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CallHandlers.h
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CallHandlers.h
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// Call handlers: flexible map of call targets to arbitrary handling code
//
// Each handler needs DEF_CALL_HANDLER and SETUP_CALL_HANDLER
//
// Call handlers emit the code that the call will be replaced by. If that
// emitted code contains calls, it must add the targets to Declares,
// which are reported as declared but not implemented symbols, so that
// JS linking brings them in.
#include "llvm/Support/ScopedPrinter.h"
typedef std::string (JSWriter::*CallHandler)(const Instruction*, std::string Name, int NumArgs);
typedef std::map<std::string, CallHandler> CallHandlerMap;
CallHandlerMap CallHandlers;
// Definitions
unsigned getNumArgOperands(const Instruction *I) {
return ImmutableCallSite(I).arg_size();
}
const Value *getActuallyCalledValue(const Instruction *I) {
const Value *CV = ImmutableCallSite(I).getCalledValue();
// if the called value is a bitcast of a function, then we just call it directly, properly
// for example, extern void x() in C will turn into void x(...) in LLVM IR, then the IR bitcasts
// it to the proper form right before the call. this both causes an unnecessary indirect
// call, and it is done with the wrong type. TODO: don't even put it into the function table
if (const Function *F = dyn_cast<const Function>(stripPointerCastsWithoutSideEffects(CV))) {
CV = F;
}
return CV;
}
// We can't and shouldn't try to invoke an LLVM intrinsic which we overload with a call hander -
// it would end up in a function table, which makes no sense.
bool canInvoke(const Value *V) {
const Function *F = dyn_cast<const Function>(V);
if (F && F->isDeclaration() && F->isIntrinsic()) {
auto Intrin = F->getIntrinsicID();
if (Intrin == Intrinsic::memcpy || Intrin == Intrinsic::memset || Intrin == Intrinsic::memmove) {
return false;
}
}
return true;
}
#define DEF_CALL_HANDLER(Ident, Code) \
std::string CH_##Ident(const Instruction *CI, std::string Name, int NumArgs=-1) { Code }
void RegisterMathUse(const std::string &Name) {
if (Name == "Math_floor") JSWriter::UsesMathFloor = true;
else if (Name == "Math_abs") JSWriter::UsesMathAbs = true;
else if (Name == "Math_sqrt") JSWriter::UsesMathSqrt = true;
else if (Name == "Math_pow") JSWriter::UsesMathPow = true;
else if (Name == "Math_cos") JSWriter::UsesMathCos = true;
else if (Name == "Math_sin") JSWriter::UsesMathSin = true;
else if (Name == "Math_tan") JSWriter::UsesMathAcos = true;
else if (Name == "Math_asin") JSWriter::UsesMathAsin = true;
else if (Name == "Math_atan") JSWriter::UsesMathAtan = true;
else if (Name == "Math_atan2") JSWriter::UsesMathAtan2 = true;
else if (Name == "Math_exp") JSWriter::UsesMathExp = true;
else if (Name == "Math_log") JSWriter::UsesMathLog = true;
else if (Name == "Math_ceil") JSWriter::UsesMathCeil = true;
else if (Name == "Math_imul") JSWriter::UsesMathImul = true;
else if (Name == "Math_min") JSWriter::UsesMathMin = true;
else if (Name == "Math_max") JSWriter::UsesMathMax = true;
else if (Name == "Math_clz32") JSWriter::UsesMathClz32 = true;
else if (Name == "Math_fround") JSWriter::UsesMathFround = true;
}
DEF_CALL_HANDLER(__default__, {
if (!CI) return ""; // we are just called from a handler that was called from getFunctionIndex, only to ensure the handler was run at least once
const Value *CV = getActuallyCalledValue(CI);
bool NeedCasts = true;
FunctionType *FT;
bool Invoke = false;
bool Emulated = false;
if (InvokeState == 1) {
InvokeState = 2;
Invoke = canInvoke(CV);
}
std::string Sig;
bool IsMath = Name.find("Math_") == 0;
if (IsMath) RegisterMathUse(Name);
bool ForcedNumArgs = NumArgs != -1;
if (!ForcedNumArgs) NumArgs = getNumArgOperands(CI);
const Function *F = dyn_cast<const Function>(CV);
if (F) {
NeedCasts = F->isDeclaration(); // if ffi call, need casts
if (IsMath && !NeedCasts) {
// this was renamed to a math function, but the actual function is implemented, presumably from libc; use that
IsMath = false;
Name = getJSName(F);
}
FT = F->getFunctionType();
} else {
FT = dyn_cast<FunctionType>(dyn_cast<PointerType>(CV->getType())->getElementType());
if (isAbsolute(CV->stripPointerCasts())) {
Name = "abort /* segfault, call an absolute addr */ ";
} else {
// function pointer call
ensureFunctionTable(FT);
if (!Invoke) {
Sig = getFunctionSignature(FT);
if (!EmulatedFunctionPointers) {
Name = std::string("FUNCTION_TABLE_") + Sig + '[' + Name + " & #FM_" + Sig + "#]";
NeedCasts = false; // function table call, so stays in asm module
} else {
Name = std::string(Relocatable ? "mftCall_" : "ftCall_") + Sig + '(' + getCast(Name, Type::getInt32Ty(CI->getContext()));
if (NumArgs > 0) Name += ',';
Emulated = true;
if (WebAssembly) {
// this call uses the wasm Table
NeedCasts = false;
}
}
}
}
}
if (!FT->isVarArg() && !ForcedNumArgs) {
int TypeNumArgs = FT->getNumParams();
if (TypeNumArgs != NumArgs) {
if (EmscriptenAssertions) prettyWarning() << "unexpected number of arguments " << utostr(NumArgs) << " in call to '" << F->getName() << "', should be " << utostr(TypeNumArgs) << "\n";
if (NumArgs > TypeNumArgs) NumArgs = TypeNumArgs; // lop off the extra params that will not be used and just break validation
}
if (EmscriptenAssertions) {
for (int i = 0; i < std::min(TypeNumArgs, NumArgs); i++) {
Type *TypeType = FT->getParamType(i);
Type *ActualType = CI->getOperand(i)->getType();
if (getFunctionSignatureLetter(TypeType) != getFunctionSignatureLetter(ActualType)) {
prettyWarning() << "unexpected argument type " << *ActualType << " at index " << utostr(i) << " in call to '" << F->getName() << "', should be " << *TypeType << "\n";
}
}
}
}
if (EmscriptenAssertions) {
Type *TypeType = FT->getReturnType();
Type *ActualType = CI->getType();
if (getFunctionSignatureLetter(TypeType) != getFunctionSignatureLetter(ActualType)) {
prettyWarning() << "unexpected return type " << *ActualType << " in call to '" << F->getName() << "', should be " << *TypeType << "\n";
}
}
if (Invoke) {
Sig = getFunctionSignature(FT);
Name = "invoke_" + Sig;
rememberUsedInvokeFunction(Name);
NeedCasts = true;
}
std::string text = Name;
if (!Emulated) text += '(';
if (Invoke) {
// add first param
if (F) {
text += relocateFunctionPointer(utostr(getFunctionIndex(F))); // convert to function pointer
} else {
text += getValueAsCastStr(CV); // already a function pointer
}
if (NumArgs > 0) text += ',';
}
// this is an ffi call if we need casts, and it is not a special Math_ builtin or wasm-only intrinsic
bool FFI = LegalizeJavaScriptFFI && NeedCasts;
if (FFI) {
if (IsMath && (Name == "Math_ceil" || Name == "Math_floor" || Name == "Math_min" || Name == "Math_max" || Name == "Math_sqrt" || Name == "Math_abs")) {
// This special Math builtin is optimizable with all types, including floats, so can treat it as non-ffi
FFI = false;
} else if (OnlyWebAssembly && Name == "f32_copysign") {
// f32_copysign doesn't need to use a +() coercion which an ffi would need, it's a simple f32 operation
FFI = false;
}
}
unsigned FFI_OUT = FFI ? ASM_FFI_OUT : 0;
for (int i = 0; i < NumArgs; i++) {
if (!NeedCasts) {
text += getValueAsStr(CI->getOperand(i));
} else {
text += getValueAsCastParenStr(CI->getOperand(i), ASM_NONSPECIFIC | FFI_OUT);
}
if (i < NumArgs - 1) text += ',';
}
text += ')';
// handle return value
Type *InstRT = CI->getType();
Type *ActualRT = FT->getReturnType();
if (!InstRT->isVoidTy() && ActualRT->isVoidTy()) {
// the function we are calling was cast to something returning a value, but it really
// does not return a value
getAssignIfNeeded(CI); // ensure the variable is defined, but do not emit it here
// it should have 0 uses, but just to be safe
} else if (!ActualRT->isVoidTy()) {
unsigned FFI_IN = FFI ? ASM_FFI_IN : 0;
text = '(' + getCast(text, ActualRT, ASM_NONSPECIFIC | FFI_IN) + ')';
// in wasm-only mode, we may have full i64s, and LLVM may bitcast them at the call site, e.g.
// %5 = call zeroext i1 bitcast (i64 (i8*, i64*, i64, i32, i32, i32)* @__atomic_compare_exchange_8 to i1 (i8*, i8*, i64, i32, i32)*)(i8* nonnull %4, i8* nonnull %3, i64 undef, i32 2, i32 2)
// in such a case we must add a truncation operation
if (OnlyWebAssembly && InstRT->isIntegerTy() && InstRT->getIntegerBitWidth() < 64 &&
ActualRT->isIntegerTy() && ActualRT->getIntegerBitWidth() == 64) {
text = "i64_trunc(" + text + ")";
}
text = getAssignIfNeeded(CI) + text;
}
return text;
})
// exceptions support
DEF_CALL_HANDLER(emscripten_preinvoke, {
UsesThrew = true;
// InvokeState is normally 0 here, but might be otherwise if a block was split apart TODO: add a function attribute for this
InvokeState = 1;
return "__THREW__ = 0";
})
DEF_CALL_HANDLER(emscripten_postinvoke, {
UsesThrew = true;
// InvokeState is normally 2 here, but can be 1 if the call in between was optimized out, or 0 if a block was split apart
InvokeState = 0;
return getAssign(CI) + "__THREW__; __THREW__ = 0";
})
DEF_CALL_HANDLER(emscripten_landingpad, {
unsigned Num = getNumArgOperands(CI);
std::string target = "__cxa_find_matching_catch_" + utostr(Num);
Declares.insert(target);
std::string Ret = getAssign(CI) + '_' + target + '(';
for (unsigned i = 1; i < Num-1; i++) { // ignore personality and cleanup XXX - we probably should not be doing that!
if (i > 1) Ret += ',';
Ret += getValueAsCastStr(CI->getOperand(i));
}
Ret += ")|0";
return Ret;
})
DEF_CALL_HANDLER(emscripten_resume, {
Declares.insert("__resumeException");
return "___resumeException(" + getValueAsCastStr(CI->getOperand(0)) + ')';
})
std::string getTempRet0() {
return "(getTempRet0() | 0)";
}
std::string setTempRet0(std::string Value) {
return "setTempRet0((" + Value + ") | 0)";
}
// setjmp support
DEF_CALL_HANDLER(emscripten_prep_setjmp, {
UsesInt32Array = true;
return getAdHocAssign("_setjmpTableSize", Type::getInt32Ty(CI->getContext())) + "4;" +
getAdHocAssign("_setjmpTable", Type::getInt32Ty(CI->getContext())) + "_malloc(40) | 0;" +
"HEAP32[_setjmpTable>>2]=0";
})
DEF_CALL_HANDLER(emscripten_cleanup_setjmp, {
return "_free(_setjmpTable|0)";
})
DEF_CALL_HANDLER(emscripten_setjmp, {
// env, label, table
Declares.insert("saveSetjmp");
return "_setjmpTable = _saveSetjmp(" + getValueAsStr(CI->getOperand(0)) + ',' + getValueAsStr(CI->getOperand(1)) + ",_setjmpTable|0,_setjmpTableSize|0)|0;_setjmpTableSize = " + getTempRet0();
})
DEF_CALL_HANDLER(emscripten_longjmp, {
Declares.insert("longjmp");
return CH___default__(CI, "_longjmp");
})
DEF_CALL_HANDLER(emscripten_check_longjmp, {
UsesThrewValue = true;
std::string Threw = getValueAsStr(CI->getOperand(0));
std::string Target = getJSName(CI);
std::string Assign = getAssign(CI);
Declares.insert("testSetjmp");
Declares.insert("longjmp");
UsesInt32Array = true;
return "if (((" + Threw + "|0) != 0) & ((threwValue|0) != 0)) { " +
Assign + "_testSetjmp(HEAP32[" + Threw + ">>2]|0, _setjmpTable|0, _setjmpTableSize|0)|0; " +
"if ((" + Target + "|0) == 0) { _longjmp(" + Threw + "|0, threwValue|0); } " + // rethrow
setTempRet0("threwValue") + "; " +
"} else { " + Assign + "-1; }";
})
DEF_CALL_HANDLER(emscripten_get_longjmp_result, {
std::string Threw = getValueAsStr(CI->getOperand(0));
return getAssign(CI) + getTempRet0();
})
// supporting async functions, see `<emscripten>/src/library_async.js` for detail.
DEF_CALL_HANDLER(emscripten_alloc_async_context, {
Declares.insert("emscripten_alloc_async_context");
// insert sp as the 2nd parameter
return getAssign(CI) + "_emscripten_alloc_async_context(" + getValueAsStr(CI->getOperand(0)) + ",sp)|0";
})
DEF_CALL_HANDLER(emscripten_check_async, {
return getAssign(CI) + "___async";
})
// prevent unwinding the stack
// preserve the return value of the return inst
DEF_CALL_HANDLER(emscripten_do_not_unwind, {
return "sp = STACKTOP";
})
// prevent unwinding the async stack
DEF_CALL_HANDLER(emscripten_do_not_unwind_async, {
return "___async_unwind = 0";
})
DEF_CALL_HANDLER(emscripten_get_async_return_value_addr, {
return getAssign(CI) + "___async_retval";
})
// emscripten instrinsics
DEF_CALL_HANDLER(emscripten_debugger, {
CantValidate = "emscripten_debugger is used";
return "debugger";
})
DEF_CALL_HANDLER(llvm_debugtrap, {
CantValidate = "llvm.debugtrap is used";
return "debugger";
})
// i64 support
DEF_CALL_HANDLER(getHigh32, {
return getAssign(CI) + getTempRet0();
})
DEF_CALL_HANDLER(setHigh32, {
return setTempRet0(getValueAsStr(CI->getOperand(0)));
})
// XXX float handling here is not optimal
#define TO_I(low, high) \
DEF_CALL_HANDLER(low, { \
std::string Input = getValueAsStr(CI->getOperand(0)); \
if (PreciseF32 && CI->getOperand(0)->getType()->isFloatTy()) Input = '+' + Input; \
return getAssign(CI) + "(~~" + Input + ")>>>0"; \
}) \
DEF_CALL_HANDLER(high, { \
std::string Input = getValueAsStr(CI->getOperand(0)); \
if (PreciseF32 && CI->getOperand(0)->getType()->isFloatTy()) Input = '+' + Input; \
UsesMathAbs = UsesMathMin = UsesMathFloor = UsesMathCeil = true; \
return getAssign(CI) + "+Math_abs(" + Input + ") >= +1 ? " + Input + " > +0 ? (~~+Math_min(+Math_floor(" + Input + " / +4294967296), +4294967295)) >>> 0 : ~~+Math_ceil((" + Input + " - +(~~" + Input + " >>> 0)) / +4294967296) >>> 0 : 0"; \
})
TO_I(FtoILow, FtoIHigh);
TO_I(DtoILow, DtoIHigh);
DEF_CALL_HANDLER(BDtoILow, {
UsesFloat64Array = true;
UsesInt32Array = true;
return "HEAPF64[tempDoublePtr>>3] = " + getValueAsStr(CI->getOperand(0)) + ';' + getAssign(CI) + "HEAP32[tempDoublePtr>>2]|0";
})
DEF_CALL_HANDLER(BDtoIHigh, {
UsesInt32Array = true;
return getAssign(CI) + "HEAP32[tempDoublePtr+4>>2]|0";
})
DEF_CALL_HANDLER(SItoF, {
std::string Ret = "(+" + getValueAsCastParenStr(CI->getOperand(0), ASM_UNSIGNED) + ") + " +
"(+4294967296*(+" + getValueAsCastParenStr(CI->getOperand(1), ASM_SIGNED) + "))";
if (PreciseF32 && CI->getType()->isFloatTy()) {
UsesMathFround = true;
Ret = "Math_fround(" + Ret + ')';
}
return getAssign(CI) + Ret;
})
DEF_CALL_HANDLER(UItoF, {
std::string Ret = "(+" + getValueAsCastParenStr(CI->getOperand(0), ASM_UNSIGNED) + ") + " +
"(+4294967296*(+" + getValueAsCastParenStr(CI->getOperand(1), ASM_UNSIGNED) + "))";
if (PreciseF32 && CI->getType()->isFloatTy()) {
UsesMathFround = true;
Ret = "Math_fround(" + Ret + ')';
}
return getAssign(CI) + Ret;
})
DEF_CALL_HANDLER(SItoD, {
return getAssign(CI) + "(+" + getValueAsCastParenStr(CI->getOperand(0), ASM_UNSIGNED) + ") + " +
"(+4294967296*(+" + getValueAsCastParenStr(CI->getOperand(1), ASM_SIGNED) + "))";
})
DEF_CALL_HANDLER(UItoD, {
return getAssign(CI) + "(+" + getValueAsCastParenStr(CI->getOperand(0), ASM_UNSIGNED) + ") + " +
"(+4294967296*(+" + getValueAsCastParenStr(CI->getOperand(1), ASM_UNSIGNED) + "))";
})
DEF_CALL_HANDLER(BItoD, {
UsesInt32Array = true;
UsesFloat64Array = true;
return "HEAP32[tempDoublePtr>>2] = " + getValueAsStr(CI->getOperand(0)) + ';' +
"HEAP32[tempDoublePtr+4>>2] = " + getValueAsStr(CI->getOperand(1)) + ';' +
getAssign(CI) + "+HEAPF64[tempDoublePtr>>3]";
})
// misc
DEF_CALL_HANDLER(llvm_nacl_atomic_store_i32, {
UsesInt32Array = true;
return "HEAP32[" + getValueAsStr(CI->getOperand(0)) + ">>2]=" + getValueAsStr(CI->getOperand(1));
})
#define CMPXCHG_HANDLER(name, HeapName) \
DEF_CALL_HANDLER(name, { \
if (!strcmp(HeapName, "HEAP8")) UsesInt8Array = true; \
else if (!strcmp(HeapName, "HEAP16")) UsesInt16Array = true; \
else if (!strcmp(HeapName, "HEAP32")) UsesInt32Array = true; \
const Value *P = CI->getOperand(0); \
if (EnablePthreads) { \
return getAssign(CI) + "(Atomics_compareExchange(" HeapName ", " + getShiftedPtr(CI->getOperand(0), 4) + ',' + getValueAsStr(CI->getOperand(1)) + ',' + getValueAsStr(CI->getOperand(2)) + ")|0)"; \
} else { \
return getLoad(CI, P, CI->getType(), 0) + ';' + \
"if ((" + getCast(getJSName(CI), CI->getType()) + ") == " + getValueAsCastParenStr(CI->getOperand(1)) + ") " + \
getStore(CI, P, CI->getType(), getValueAsStr(CI->getOperand(2)), 0); \
} \
})
CMPXCHG_HANDLER(llvm_nacl_atomic_cmpxchg_i8, "HEAP8");
CMPXCHG_HANDLER(llvm_nacl_atomic_cmpxchg_i16, "HEAP16");
CMPXCHG_HANDLER(llvm_nacl_atomic_cmpxchg_i32, "HEAP32");
#define UNROLL_LOOP_MAX 8
#define WRITE_LOOP_MAX 128
DEF_CALL_HANDLER(llvm_memcpy_p0i8_p0i8_i32, {
if (CI) {
ConstantInt *AlignInt = dyn_cast<ConstantInt>(CI->getOperand(3));
if (AlignInt) {
ConstantInt *LenInt = dyn_cast<ConstantInt>(CI->getOperand(2));
if (LenInt) {
// we can emit inline code for this
unsigned Len = LenInt->getZExtValue();
if (Len <= WRITE_LOOP_MAX) {
unsigned Align = AlignInt->getZExtValue();
if (OnlyWebAssembly) {
// wasm
if (Align > 8) Align = 8;
else if (Align == 0) Align = 1; // align 0 means 1 in memcpy and memset (unlike other places where it means 'default')
unsigned Pos = 0;
std::string Ret;
std::string Dest = getValueAsStr(CI->getOperand(0));
std::string Src = getValueAsStr(CI->getOperand(1));
unsigned Size = 8; // start by writing out i64 copies
while (Len > 0) {
// handle as much as we can in the current size
unsigned CurrLen = Size*(Len/Size);
for (unsigned Offset = 0; Offset < CurrLen; Offset += Size) {
unsigned PosOffset = Pos + Offset;
std::string Add = PosOffset == 0 ? "" : ('+' + utostr(PosOffset) + " | 0");
Ret += "; store" + utostr(Size) + '(' + Dest + Add +
",load" + utostr(Size) + '(' + Src + Add + ',' + utostr(std::min(Align, Size)) + ')' +
',' + utostr(std::min(Align, Size)) + ')';
}
Pos += CurrLen;
Len -= CurrLen;
Size /= 2;
}
return Ret;
} else {
// asm.js
if (Align > 4) Align = 4;
else if (Align == 0) Align = 1; // align 0 means 1 in memcpy and memset (unlike other places where it means 'default/4')
if (Align == 1 && Len > 1 && WarnOnUnaligned) {
errs() << "emcc: warning: unaligned memcpy in " << CI->getParent()->getParent()->getName() << ':' << *CI << " (compiler's fault?)\n";
}
unsigned Pos = 0;
std::string Ret;
std::string Dest = getValueAsStr(CI->getOperand(0));
std::string Src = getValueAsStr(CI->getOperand(1));
while (Len > 0) {
// handle as much as we can in the current alignment
unsigned CurrLen = Align*(Len/Align);
unsigned Factor = CurrLen/Align;
if (Factor <= UNROLL_LOOP_MAX) {
// unroll
for (unsigned Offset = 0; Offset < CurrLen; Offset += Align) {
unsigned PosOffset = Pos + Offset;
std::string Add = PosOffset == 0 ? "" : ('+' + utostr(PosOffset));
Ret += ';' + getHeapAccess(Dest + Add, Align) + '=' + getHeapAccess(Src + Add, Align) + "|0";
}
} else {
// emit a loop
UsedVars["dest"] = UsedVars["src"] = UsedVars["stop"] = Type::getInt32Ty(TheModule->getContext());
std::string Add = Pos == 0 ? "" : ('+' + utostr(Pos) + "|0");
Ret += "dest=" + Dest + Add + "; src=" + Src + Add + "; stop=dest+" + utostr(CurrLen) + "|0; do { " + getHeapAccess("dest", Align) + '=' + getHeapAccess("src", Align) + "|0; dest=dest+" + utostr(Align) + "|0; src=src+" + utostr(Align) + "|0; } while ((dest|0) < (stop|0))";
}
Pos += CurrLen;
Len -= CurrLen;
Align /= 2;
}
return Ret;
}
}
}
}
}
Declares.insert("memcpy");
return CH___default__(CI, "_memcpy", 3) + "|0";
})
DEF_CALL_HANDLER(llvm_memset_p0i8_i32, {
if (CI) {
ConstantInt *AlignInt = dyn_cast<ConstantInt>(CI->getOperand(3));
if (AlignInt) {
ConstantInt *LenInt = dyn_cast<ConstantInt>(CI->getOperand(2));
if (LenInt) {
ConstantInt *ValInt = dyn_cast<ConstantInt>(CI->getOperand(1));
if (ValInt) {
// we can emit inline code for this
unsigned Len = LenInt->getZExtValue();
if (Len <= WRITE_LOOP_MAX) {
unsigned Align = AlignInt->getZExtValue();
if (OnlyWebAssembly) {
// wasm
uint64_t Val64 = ValInt->getZExtValue();
if (Align > 8) Align = 8;
else if (Align == 0) Align = 1; // align 0 means 1 in memcpy and memset (unlike other places where it means 'default')
unsigned Pos = 0;
std::string Ret;
std::string Dest = getValueAsStr(CI->getOperand(0));
std::string Src = getValueAsStr(CI->getOperand(1));
unsigned Size = 8; // start by writing out i64 copies
while (Len > 0) {
// handle as much as we can in the current size
unsigned CurrLen = Size*(Len/Size);
uint64_t FullVal = 0;
for (unsigned i = 0; i < Size; i++) {
FullVal <<= 8;
FullVal |= Val64;
}
std::string ValStr = Size < 8 ? utostr(FullVal) : emitI64Const(FullVal);
for (unsigned Offset = 0; Offset < CurrLen; Offset += Size) {
unsigned PosOffset = Pos + Offset;
std::string Add = PosOffset == 0 ? "" : ('+' + utostr(PosOffset) + "|0");
Ret += "; store" + utostr(Size) + '(' + Dest + Add + ',' + ValStr + ',' + utostr(std::min(Align, Size)) + ')';
}
Pos += CurrLen;
Len -= CurrLen;
Size /= 2;
}
return Ret;
} else {
// asm.js
unsigned Val = ValInt->getZExtValue();
if (Align > 4) Align = 4;
else if (Align == 0) Align = 1; // align 0 means 1 in memcpy and memset (unlike other places where it means 'default/4')
if (Align == 1 && Len > 1 && WarnOnUnaligned) {
errs() << "emcc: warning: unaligned memcpy in " << CI->getParent()->getParent()->getName() << ':' << *CI << " (compiler's fault?)\n";
}
unsigned Pos = 0;
std::string Ret;
std::string Dest = getValueAsStr(CI->getOperand(0));
while (Len > 0) {
// handle as much as we can in the current alignment
unsigned CurrLen = Align*(Len/Align);
unsigned FullVal = 0;
for (unsigned i = 0; i < Align; i++) {
FullVal <<= 8;
FullVal |= Val;
}
unsigned Factor = CurrLen/Align;
if (Factor <= UNROLL_LOOP_MAX) {
// unroll
for (unsigned Offset = 0; Offset < CurrLen; Offset += Align) {
unsigned PosOffset = Pos + Offset;
std::string Add = PosOffset == 0 ? "" : ('+' + utostr(PosOffset));
Ret += ';' + getHeapAccess(Dest + Add, Align) + '=' + utostr(FullVal) + "|0";
}
} else {
// emit a loop
UsedVars["dest"] = UsedVars["stop"] = Type::getInt32Ty(TheModule->getContext());
std::string Add = Pos == 0 ? "" : ('+' + utostr(Pos) + "|0");
Ret += "dest=" + Dest + Add + "; stop=dest+" + utostr(CurrLen) + "|0; do { " + getHeapAccess("dest", Align) + '=' + utostr(FullVal) + "|0; dest=dest+" + utostr(Align) + "|0; } while ((dest|0) < (stop|0))";
}
Pos += CurrLen;
Len -= CurrLen;
Align /= 2;
}
return Ret;
}
}
}
}
}
}
Declares.insert("memset");
return CH___default__(CI, "_memset", 3) + "|0";
})
DEF_CALL_HANDLER(llvm_memmove_p0i8_p0i8_i32, {
Declares.insert("memmove");
return CH___default__(CI, "_memmove", 3) + "|0";
})
DEF_CALL_HANDLER(llvm_expect_i32, {
return getAssign(CI) + getValueAsStr(CI->getOperand(0));
})
DEF_CALL_HANDLER(llvm_expect_i1, {
return getAssign(CI) + getValueAsStr(CI->getOperand(0));
})
DEF_CALL_HANDLER(llvm_dbg_declare, {
if (!EnableCyberDWARF || !EnableCyberDWARFIntrinsics)
return "";
auto VariableOffset = "0";
auto AssignedValue = cast<MetadataAsValue>(CI->getOperand(0))->getMetadata();
auto const LocalVariableMD = cast<MetadataAsValue>(CI->getOperand(1))->getMetadata();
auto const LocalVariableDI = cast<DILocalVariable>(LocalVariableMD);
auto const LocalVariableType = LocalVariableDI->getRawType();
auto const DwarfOp = cast<MetadataAsValue>(CI->getOperand(2))->getMetadata();
std::string LocalVariableName = LocalVariableDI->getName().str();
auto VarMD = utostr(getIDForMetadata(LocalVariableType))
+ ',' + VariableOffset + ',' + utostr(getIDForMetadata(DwarfOp))
+ ",\"" + LocalVariableName + '"';
if (auto const *ValAsAssign = dyn_cast<LocalAsMetadata>(AssignedValue)) {
Declares.insert("metadata_llvm_dbg_value_local");
auto LocalVarName = getJSName(ValAsAssign->getValue()->stripPointerCasts());
return "_metadata_llvm_dbg_value_local(" + LocalVarName + ',' + VarMD + ')';
} else if (auto const *ValAsAssign = dyn_cast<ConstantAsMetadata>(AssignedValue)) {
Declares.insert("metadata_llvm_dbg_value_constant");
return "_metadata_llvm_dbg_value_constant(\"" + getValueAsStr(ValAsAssign->getValue())
+ ',' + VarMD + ')';
}
return "";
})
DEF_CALL_HANDLER(llvm_dbg_value, {
if (!EnableCyberDWARF || !EnableCyberDWARFIntrinsics)
return "";
auto VariableOffset = getValueAsStr(CI->getOperand(1));
auto AssignedValue = cast<MetadataAsValue>(CI->getOperand(0))->getMetadata();
auto const LocalVariableMD = cast<MetadataAsValue>(CI->getOperand(1))->getMetadata();
auto const LocalVariableDI = cast<DILocalVariable>(LocalVariableMD);
auto const LocalVariableType = LocalVariableDI->getRawType();
auto const DwarfOp = cast<MetadataAsValue>(CI->getOperand(2))->getMetadata();
std::string LocalVariableName = LocalVariableDI->getName().str();
auto VarMD = utostr(getIDForMetadata(LocalVariableType))
+ ',' + VariableOffset + ',' + utostr(getIDForMetadata(DwarfOp))
+ ",\"" + LocalVariableName + '"';
if (auto const *ValAsAssign = dyn_cast<LocalAsMetadata>(AssignedValue)) {
Declares.insert("metadata_llvm_dbg_value_local");
auto LocalVarName = getJSName(ValAsAssign->getValue()->stripPointerCasts());
return "_metadata_llvm_dbg_value_local(" + LocalVarName + ',' + VarMD + ')';
} else if (auto const *ValAsAssign = dyn_cast<ConstantAsMetadata>(AssignedValue)) {
Declares.insert("metadata_llvm_dbg_value_constant");
return "_metadata_llvm_dbg_value_constant(\"" + getValueAsStr(ValAsAssign->getValue())
+ ',' + VarMD + ')';
}
return "";
})
DEF_CALL_HANDLER(llvm_lifetime_start, {
return "";
})
DEF_CALL_HANDLER(llvm_lifetime_end, {
return "";
})
DEF_CALL_HANDLER(llvm_lifetime_start_p0i8, {
return "";
})
DEF_CALL_HANDLER(llvm_lifetime_end_p0i8, {
return "";
})
DEF_CALL_HANDLER(llvm_invariant_start, {
return "";
})
DEF_CALL_HANDLER(llvm_invariant_end, {
return "";
})
DEF_CALL_HANDLER(llvm_invariant_start_p0i8, {
return "";
})
DEF_CALL_HANDLER(llvm_invariant_end_p0i8, {
return "";
})
DEF_CALL_HANDLER(llvm_prefetch, {
return "";
})
DEF_CALL_HANDLER(llvm_objectsize_i32_p0i8, {
return getAssign(CI) + ((cast<ConstantInt>(CI->getOperand(1)))->getZExtValue() == 0 ? "-1" : "0");
})
DEF_CALL_HANDLER(llvm_flt_rounds, {
// FLT_ROUNDS helper. We don't support setting the rounding mode dynamically,
// so it's always round-to-nearest (1).
return getAssign(CI) + '1';
})
DEF_CALL_HANDLER(bitshift64Lshr, {
Declares.insert("bitshift64Lshr");
return CH___default__(CI, "_bitshift64Lshr", 3);
})
DEF_CALL_HANDLER(bitshift64Ashr, {
Declares.insert("bitshift64Ashr");
return CH___default__(CI, "_bitshift64Ashr", 3);
})
DEF_CALL_HANDLER(bitshift64Shl, {
Declares.insert("bitshift64Shl");
return CH___default__(CI, "_bitshift64Shl", 3);
})
DEF_CALL_HANDLER(llvm_ctlz_i32, {
UsesMathClz32 = true;
return CH___default__(CI, "Math_clz32", 1);
})
DEF_CALL_HANDLER(llvm_cttz_i32, {
if (OnlyWebAssembly) {
return CH___default__(CI, "i32_cttz", 1);
}
Declares.insert("llvm_cttz_i32");
return CH___default__(CI, "_llvm_cttz_i32", 1);
})
DEF_CALL_HANDLER(llvm_ctlz_i64, {
if (OnlyWebAssembly) {
return CH___default__(CI, "i64_ctlz", 1);
}
Declares.insert("llvm_ctlz_i64");
return CH___default__(CI, "_llvm_ctlz_i64");
})
DEF_CALL_HANDLER(llvm_cttz_i64, {
if (OnlyWebAssembly) {
return CH___default__(CI, "i64_cttz", 1);
}
Declares.insert("llvm_cttz_i64");
return CH___default__(CI, "_llvm_cttz_i64");
})
DEF_CALL_HANDLER(llvm_ctpop_i32, {
if (OnlyWebAssembly) {
return CH___default__(CI, "i32_ctpop", 1);
}
Declares.insert("llvm_ctpop_i32");
return CH___default__(CI, "_llvm_ctpop_i32");
})
DEF_CALL_HANDLER(llvm_ctpop_i64, {
if (OnlyWebAssembly) {
return CH___default__(CI, "i64_ctpop", 1);
}
Declares.insert("llvm_ctpop_i64");
return CH___default__(CI, "_llvm_ctpop_i64");
})
DEF_CALL_HANDLER(llvm_copysign_f32, {
if (OnlyWebAssembly) {
return CH___default__(CI, "f32_copysign", 2);
}
Declares.insert("llvm_copysign_f32");
return CH___default__(CI, "_llvm_copysign_f32", 2);
})
DEF_CALL_HANDLER(llvm_copysign_f64, {
if (OnlyWebAssembly) {
return CH___default__(CI, "(f64_copysign)", 2); // XXX add parens as this will be +f64_copysign(...), which triggers +f64 => f64.0. TODO fix regex in emscripten.py
}
Declares.insert("llvm_copysign_f64");
return CH___default__(CI, "_llvm_copysign_f64", 2);
})
DEF_CALL_HANDLER(llvm_rint_f32, {
Declares.insert("llvm_rint_f32");
return CH___default__(CI, "_llvm_rint_f32");
})
DEF_CALL_HANDLER(llvm_rint_f64, {
Declares.insert("llvm_rint_f64");
return CH___default__(CI, "_llvm_rint_f64");
})
// EM_ASM support
// callType specifies in which thread's context a given EM_ASM block will be executed in.
enum EmAsmCallType
{
EmAsmOnCallingThread,
EmAsmSyncOnMainThread,
EmAsmAsyncOnMainThread,
};
std::string handleAsmConst(const Instruction *CI, EmAsmCallType callType) {
unsigned Num = getNumArgOperands(CI);
std::string Sig;
Sig += getFunctionSignatureLetter(CI->getType());
for (unsigned i = 1; i < Num; i++) {
Sig += getFunctionSignatureLetter(CI->getOperand(i)->getType());
}
const char *callTypeFunc;
switch(callType)
{
case EmAsmOnCallingThread: callTypeFunc = ""; break;
case EmAsmSyncOnMainThread: callTypeFunc = "sync_on_main_thread_"; break;
case EmAsmAsyncOnMainThread: callTypeFunc = "async_on_main_thread_"; break;
}
std::string func = callTypeFunc + Sig;
std::string ret = "_emscripten_asm_const_" + func + '(' + utostr(getAsmConstId(CI->getOperand(0), callTypeFunc, Sig));
for (unsigned i = 1; i < Num; i++) {
ret += ',' + getValueAsCastParenStr(CI->getOperand(i), ASM_NONSPECIFIC);
}
return ret + ')';
}
DEF_CALL_HANDLER(emscripten_asm_const, {
Declares.insert("emscripten_asm_const");
return handleAsmConst(CI, EmAsmOnCallingThread);
})
DEF_CALL_HANDLER(emscripten_asm_const_int, {
Declares.insert("emscripten_asm_const_int");
return getAssign(CI) + getCast(handleAsmConst(CI, EmAsmOnCallingThread), Type::getInt32Ty(CI->getContext()));
})
DEF_CALL_HANDLER(emscripten_asm_const_double, {
Declares.insert("emscripten_asm_const_double");
return getAssign(CI) + getCast(handleAsmConst(CI, EmAsmOnCallingThread), Type::getDoubleTy(CI->getContext()));
})
DEF_CALL_HANDLER(emscripten_asm_const_sync_on_main_thread, {
Declares.insert("emscripten_asm_const_sync_on_main_thread");
return handleAsmConst(CI, EmAsmSyncOnMainThread);
})
DEF_CALL_HANDLER(emscripten_asm_const_int_sync_on_main_thread, {
Declares.insert("emscripten_asm_const_int_sync_on_main_thread");
return getAssign(CI) + getCast(handleAsmConst(CI, EmAsmSyncOnMainThread), Type::getInt32Ty(CI->getContext()));
})
DEF_CALL_HANDLER(emscripten_asm_const_double_sync_on_main_thread, {
Declares.insert("emscripten_asm_const_double_sync_on_main_thread");
return getAssign(CI) + getCast(handleAsmConst(CI, EmAsmSyncOnMainThread), Type::getDoubleTy(CI->getContext()));
})
DEF_CALL_HANDLER(emscripten_asm_const_async_on_main_thread, {
Declares.insert("emscripten_asm_const_async_on_main_thread");
return handleAsmConst(CI, EmAsmAsyncOnMainThread);
})
DEF_CALL_HANDLER(emscripten_atomic_exchange_u8, {
UsesInt8Array = true;
if (!CI) return ""; // we are just called from a handler that was called from getFunctionIndex, only to ensure the handler was run at least once
return getAssign(CI) + "(Atomics_exchange(HEAP8, " + getValueAsStr(CI->getOperand(0)) + ',' + getValueAsStr(CI->getOperand(1)) + ")|0)";
})
DEF_CALL_HANDLER(emscripten_atomic_exchange_u16, {
UsesInt16Array = true;
if (!CI) return ""; // we are just called from a handler that was called from getFunctionIndex, only to ensure the handler was run at least once
return getAssign(CI) + "(Atomics_exchange(HEAP16, " + getShiftedPtr(CI->getOperand(0), 2) + ',' + getValueAsStr(CI->getOperand(1)) + ")|0)";
})
DEF_CALL_HANDLER(emscripten_atomic_exchange_u32, {
UsesInt32Array = true;
if (!CI) return ""; // we are just called from a handler that was called from getFunctionIndex, only to ensure the handler was run at least once
return getAssign(CI) + "(Atomics_exchange(HEAP32, " + getShiftedPtr(CI->getOperand(0), 4) + ',' + getValueAsStr(CI->getOperand(1)) + ")|0)";
})
DEF_CALL_HANDLER(__atomic_exchange_8, {
if (!CI) return ""; // we are just called from a handler that was called from getFunctionIndex, only to ensure the handler was run at least once
if (EnablePthreads) {
return getAssign(CI) + '(' + (OnlyWebAssembly ? "i64_atomics_exchange" : "_emscripten_atomic_exchange_u64") + '(' + getValueAsStr(CI->getOperand(0)) + ',' + getValueAsStr(CI->getOperand(1)) + ")|0)";
} else {
return getAssign(CI) + getStore(CI, CI->getOperand(0), CI->getType(), getValueAsStr(CI->getOperand(1)), 0);
}
})
DEF_CALL_HANDLER(emscripten_atomic_cas_u8, {
UsesInt8Array = true;
if (!CI) return ""; // we are just called from a handler that was called from getFunctionIndex, only to ensure the handler was run at least once
return getAssign(CI) + "(Atomics_compareExchange(HEAP8, " + getValueAsStr(CI->getOperand(0)) + ',' + getValueAsStr(CI->getOperand(1)) + ',' + getValueAsStr(CI->getOperand(2)) + ")|0)";
})
DEF_CALL_HANDLER(emscripten_atomic_cas_u16, {
UsesInt16Array = true;
if (!CI) return ""; // we are just called from a handler that was called from getFunctionIndex, only to ensure the handler was run at least once
return getAssign(CI) + "(Atomics_compareExchange(HEAP16, " + getShiftedPtr(CI->getOperand(0), 2) + ',' + getValueAsStr(CI->getOperand(1)) + ',' + getValueAsStr(CI->getOperand(2)) + ")|0)";
})
DEF_CALL_HANDLER(emscripten_atomic_cas_u32, {
UsesInt32Array = true;
if (!CI) return ""; // we are just called from a handler that was called from getFunctionIndex, only to ensure the handler was run at least once
return getAssign(CI) + "(Atomics_compareExchange(HEAP32, " + getShiftedPtr(CI->getOperand(0), 4) + ',' + getValueAsStr(CI->getOperand(1)) + ',' + getValueAsStr(CI->getOperand(2)) + ")|0)";
})
DEF_CALL_HANDLER(emscripten_atomic_load_u8, {
UsesInt8Array = true;
if (!CI) return ""; // we are just called from a handler that was called from getFunctionIndex, only to ensure the handler was run at least once
return getAssign(CI) + "(Atomics_load(HEAP8, " + getValueAsStr(CI->getOperand(0)) + ")|0)";
})
DEF_CALL_HANDLER(emscripten_atomic_load_u16, {
UsesInt16Array = true;
if (!CI) return ""; // we are just called from a handler that was called from getFunctionIndex, only to ensure the handler was run at least once
return getAssign(CI) + "(Atomics_load(HEAP16, " + getShiftedPtr(CI->getOperand(0), 2) + ")|0)";
})
DEF_CALL_HANDLER(emscripten_atomic_load_u32, {
UsesInt32Array = true;
if (!CI) return ""; // we are just called from a handler that was called from getFunctionIndex, only to ensure the handler was run at least once
return getAssign(CI) + "(Atomics_load(HEAP32, " + getShiftedPtr(CI->getOperand(0), 4) + ")|0)";
})
DEF_CALL_HANDLER(emscripten_atomic_load_f32, {
// TODO: If https://bugzilla.mozilla.org/show_bug.cgi?id=1131613 is implemented, we could use the commented out version. Until then,
// we must emulate manually.
Declares.insert("_Atomics_load_f32_emulated");
UsesMathFround = true;
if (!CI) return ""; // we are just called from a handler that was called from getFunctionIndex, only to ensure the handler was run at least once
return getAssign(CI) + (PreciseF32 ? "Math_fround(" : "+") + "__Atomics_load_f32_emulated(" + getShiftedPtr(CI->getOperand(0), 4) + (PreciseF32 ? "))" : ")");
// return getAssign(CI) + "Atomics_load(HEAPF32, " + getShiftedPtr(CI->getOperand(0), 4) + ')';
})
DEF_CALL_HANDLER(emscripten_atomic_load_f64, {
// TODO: If https://bugzilla.mozilla.org/show_bug.cgi?id=1131624 is implemented, we could use the commented out version. Until then,
// we must emulate manually.
Declares.insert("emscripten_atomic_load_f64");
if (!CI) return ""; // we are just called from a handler that was called from getFunctionIndex, only to ensure the handler was run at least once
return getAssign(CI) + "+_emscripten_atomic_load_f64(" + getShiftedPtr(CI->getOperand(0), 8) + ')';
// return getAssign(CI) + "Atomics_load(HEAPF64, " + getShiftedPtr(CI->getOperand(0), 8) + ')';
})
DEF_CALL_HANDLER(__atomic_load_8, {
const char *op;
if (EnablePthreads && OnlyWebAssembly) op = "i64_atomics_load";
else if (OnlyWebAssembly) op = "load8";
else op = "_emscripten_atomic_load_u64";
if (!CI) return ""; // we are just called from a handler that was called from getFunctionIndex, only to ensure the handler was run at least once
return getAssign(CI) + '(' + op + '(' + getValueAsStr(CI->getOperand(0)) + ")|0)";
})
DEF_CALL_HANDLER(emscripten_atomic_store_u8, {
UsesInt8Array = true;
if (!CI) return ""; // we are just called from a handler that was called from getFunctionIndex, only to ensure the handler was run at least once
return getAssign(CI) + "(Atomics_store(HEAP8, " + getValueAsStr(CI->getOperand(0)) + ',' + getValueAsStr(CI->getOperand(1)) + ")|0)";
})
DEF_CALL_HANDLER(emscripten_atomic_store_u16, {
UsesInt16Array = true;
if (!CI) return ""; // we are just called from a handler that was called from getFunctionIndex, only to ensure the handler was run at least once
return getAssign(CI) + "(Atomics_store(HEAP16, " + getShiftedPtr(CI->getOperand(0), 2) + ',' + getValueAsStr(CI->getOperand(1)) + ")|0)";
})
DEF_CALL_HANDLER(emscripten_atomic_store_u32, {
UsesInt32Array = true;
if (!CI) return ""; // we are just called from a handler that was called from getFunctionIndex, only to ensure the handler was run at least once
return getAssign(CI) + "(Atomics_store(HEAP32, " + getShiftedPtr(CI->getOperand(0), 4) + ',' + getValueAsStr(CI->getOperand(1)) + ")|0)";
})
DEF_CALL_HANDLER(emscripten_atomic_store_f32, {
// TODO: If https://bugzilla.mozilla.org/show_bug.cgi?id=1131613 is implemented, we could use the commented out version. Until then,
// we must emulate manually.
Declares.insert("emscripten_atomic_store_f32");
if (!CI) return ""; // we are just called from a handler that was called from getFunctionIndex, only to ensure the handler was run at least once
return getAssign(CI) + "_emscripten_atomic_store_f32(" + getShiftedPtr(CI->getOperand(0), 4) + ',' + getValueAsStr(CI->getOperand(1)) + ')';
// return getAssign(CI) + "Atomics_store(HEAPF32, " + getShiftedPtr(CI->getOperand(0), 4) + ',' + getValueAsStr(CI->getOperand(1)) + ')';
})
DEF_CALL_HANDLER(emscripten_atomic_store_f64, {
// TODO: If https://bugzilla.mozilla.org/show_bug.cgi?id=1131624 is implemented, we could use the commented out version. Until then,
// we must emulate manually.
Declares.insert("emscripten_atomic_store_f64");
if (!CI) return ""; // we are just called from a handler that was called from getFunctionIndex, only to ensure the handler was run at least once
return getAssign(CI) + "+_emscripten_atomic_store_f64(" + getShiftedPtr(CI->getOperand(0), 8) + ',' + getValueAsStr(CI->getOperand(1)) + ')';
// return getAssign(CI) + "Atomics_store(HEAPF64, " + getShiftedPtr(CI->getOperand(0), 8) + ',' + getValueAsStr(CI->getOperand(1)) + ')';
})
DEF_CALL_HANDLER(__atomic_store_8, {
const char *op;
if (EnablePthreads && OnlyWebAssembly) op = "i64_atomics_store";
else if (OnlyWebAssembly) op = "store8";
else op = "_emscripten_atomic_store_u64";
if (!CI) return ""; // we are just called from a handler that was called from getFunctionIndex, only to ensure the handler was run at least once
return std::string("(") + op + '(' + getValueAsStr(CI->getOperand(0)) + ',' + getValueAsStr(CI->getOperand(1)) + ")|0)";
})
DEF_CALL_HANDLER(emscripten_atomic_add_u8, {
UsesInt8Array = true;
if (!CI) return ""; // we are just called from a handler that was called from getFunctionIndex, only to ensure the handler was run at least once
return getAssign(CI) + "(Atomics_add(HEAP8, " + getValueAsStr(CI->getOperand(0)) + ',' + getValueAsStr(CI->getOperand(1)) + ")|0)";
})
DEF_CALL_HANDLER(emscripten_atomic_add_u16, {
UsesInt16Array = true;
if (!CI) return ""; // we are just called from a handler that was called from getFunctionIndex, only to ensure the handler was run at least once
return getAssign(CI) + "(Atomics_add(HEAP16, " + getShiftedPtr(CI->getOperand(0), 2) + ',' + getValueAsStr(CI->getOperand(1)) + ")|0)";
})
DEF_CALL_HANDLER(emscripten_atomic_add_u32, {
UsesInt32Array = true;
if (!CI) return ""; // we are just called from a handler that was called from getFunctionIndex, only to ensure the handler was run at least once
return getAssign(CI) + "(Atomics_add(HEAP32, " + getShiftedPtr(CI->getOperand(0), 4) + ',' + getValueAsStr(CI->getOperand(1)) + ")|0)";
})
DEF_CALL_HANDLER(__atomic_fetch_add_8, {
const char *op;
if (EnablePthreads && OnlyWebAssembly) op = "i64_atomics_add";
else if (OnlyWebAssembly) op = "i64_add";
else op = "__emscripten_atomic_fetch_and_add_u64";
if (!CI) return ""; // we are just called from a handler that was called from getFunctionIndex, only to ensure the handler was run at least once
return getAssign(CI) + '(' + op + '(' + getValueAsStr(CI->getOperand(0)) + ',' + getValueAsStr(CI->getOperand(1)) + ")|0)";
})
DEF_CALL_HANDLER(emscripten_atomic_sub_u8, {
UsesInt8Array = true;
if (!CI) return ""; // we are just called from a handler that was called from getFunctionIndex, only to ensure the handler was run at least once
return getAssign(CI) + "(Atomics_sub(HEAP8, " + getValueAsStr(CI->getOperand(0)) + ',' + getValueAsStr(CI->getOperand(1)) + ")|0)";
})
DEF_CALL_HANDLER(emscripten_atomic_sub_u16, {
UsesInt16Array = true;
if (!CI) return ""; // we are just called from a handler that was called from getFunctionIndex, only to ensure the handler was run at least once
return getAssign(CI) + "(Atomics_sub(HEAP16, " + getShiftedPtr(CI->getOperand(0), 2) + ',' + getValueAsStr(CI->getOperand(1)) + ")|0)";
})
DEF_CALL_HANDLER(emscripten_atomic_sub_u32, {
UsesInt32Array = true;
if (!CI) return ""; // we are just called from a handler that was called from getFunctionIndex, only to ensure the handler was run at least once