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Fix ABI flags in RISC-V/LoongArch ELF file generated by rustc #114332

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merged 4 commits into from
Aug 20, 2023
Merged

Fix ABI flags in RISC-V/LoongArch ELF file generated by rustc #114332

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a8a92f5
Fix ABI flags in RISC-V/LoongArch ELF file generated by rustc
nbdd0121 Aug 1, 2023
aaf1b1b
Bless test changes
nbdd0121 Aug 1, 2023
5ed556e
Add comment explanining unstable_target_features
nbdd0121 Aug 2, 2023
2f68d97
Fix ELF flag for RISC-V targets without explicit ABI
nbdd0121 Aug 4, 2023
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38 changes: 21 additions & 17 deletions compiler/rustc_codegen_ssa/src/back/metadata.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -16,6 +16,7 @@ use rustc_metadata::fs::METADATA_FILENAME;
use rustc_metadata::EncodedMetadata;
use rustc_session::cstore::MetadataLoader;
use rustc_session::Session;
use rustc_span::sym;
use rustc_target::abi::Endian;
use rustc_target::spec::{ef_avr_arch, RelocModel, Target};

Expand Down Expand Up @@ -272,35 +273,38 @@ pub(crate) fn create_object_file(sess: &Session) -> Option<write::Object<'static
Architecture::Riscv32 | Architecture::Riscv64 => {
// Source: https://github.com/riscv-non-isa/riscv-elf-psabi-doc/blob/079772828bd10933d34121117a222b4cc0ee2200/riscv-elf.adoc
let mut e_flags: u32 = 0x0;
let features = &sess.target.options.features;

// Check if compressed is enabled
if features.contains("+c") {
// `unstable_target_features` is used here because "c" is gated behind riscv_target_feature.
if sess.unstable_target_features.contains(&sym::c) {
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e_flags |= elf::EF_RISCV_RVC;
}

// Select the appropriate floating-point ABI
if features.contains("+d") {
e_flags |= elf::EF_RISCV_FLOAT_ABI_DOUBLE;
} else if features.contains("+f") {
e_flags |= elf::EF_RISCV_FLOAT_ABI_SINGLE;
} else {
e_flags |= elf::EF_RISCV_FLOAT_ABI_SOFT;
// Set the appropriate flag based on ABI
// This needs to match LLVM `RISCVELFStreamer.cpp`
match &*sess.target.llvm_abiname {
"" | "ilp32" | "lp64" => (),
"ilp32f" | "lp64f" => e_flags |= elf::EF_RISCV_FLOAT_ABI_SINGLE,
"ilp32d" | "lp64d" => e_flags |= elf::EF_RISCV_FLOAT_ABI_DOUBLE,
"ilp32e" => e_flags |= elf::EF_RISCV_RVE,
_ => bug!("unknown RISC-V ABI name"),
}

e_flags
}
Architecture::LoongArch64 => {
// Source: https://github.com/loongson/la-abi-specs/blob/release/laelf.adoc#e_flags-identifies-abi-type-and-version
let mut e_flags: u32 = elf::EF_LARCH_OBJABI_V1;
let features = &sess.target.options.features;

// Select the appropriate floating-point ABI
if features.contains("+d") {
e_flags |= elf::EF_LARCH_ABI_DOUBLE_FLOAT;
} else if features.contains("+f") {
e_flags |= elf::EF_LARCH_ABI_SINGLE_FLOAT;
} else {
e_flags |= elf::EF_LARCH_ABI_SOFT_FLOAT;
// Set the appropriate flag based on ABI
// This needs to match LLVM `LoongArchELFStreamer.cpp`
match &*sess.target.llvm_abiname {
"ilp32s" | "lp64s" => e_flags |= elf::EF_LARCH_ABI_SOFT_FLOAT,
"ilp32f" | "lp64f" => e_flags |= elf::EF_LARCH_ABI_SINGLE_FLOAT,
"ilp32d" | "lp64d" => e_flags |= elf::EF_LARCH_ABI_DOUBLE_FLOAT,
_ => bug!("unknown RISC-V ABI name"),
}

e_flags
}
Architecture::Avr => {
Expand Down
1 change: 1 addition & 0 deletions compiler/rustc_span/src/symbol.rs
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Expand Up @@ -445,6 +445,7 @@ symbols! {
bridge,
bswap,
builtin_syntax,
c,
c_str,
c_str_literals,
c_unwind,
Expand Down
68 changes: 34 additions & 34 deletions tests/ui/or-patterns/missing-bindings.stderr
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Expand Up @@ -79,6 +79,14 @@ LL | let (A(A(..) | B(a), _) | B(A(a, _) | B(a))) = Y;
| |
| pattern doesn't bind `a`

error[E0408]: variable `c` is not bound in all patterns
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what happened here... I assume this is related to adding c as a known symbol???
Yeah, I renamed c to builtin_syntax and the error changed in nightly. Looks like it's sorting the symbols by their index? That's strange and bad, but luckily not your problem.

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yeah I see, I'll fix it

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#114454

--> $DIR/missing-bindings.rs:45:12
|
LL | let (A(A(a, b) | B(c), d) | B(e)) = Y;
| ^^^^^^^ - variable not in all patterns
| |
| pattern doesn't bind `c`

error[E0408]: variable `a` is not bound in all patterns
--> $DIR/missing-bindings.rs:45:22
|
Expand All @@ -96,12 +104,12 @@ LL | let (A(A(a, b) | B(c), d) | B(e)) = Y;
| variable not in all patterns

error[E0408]: variable `c` is not bound in all patterns
--> $DIR/missing-bindings.rs:45:12
--> $DIR/missing-bindings.rs:45:33
|
LL | let (A(A(a, b) | B(c), d) | B(e)) = Y;
| ^^^^^^^ - variable not in all patterns
| |
| pattern doesn't bind `c`
| - ^^^^ pattern doesn't bind `c`
| |
| variable not in all patterns

error[E0408]: variable `d` is not bound in all patterns
--> $DIR/missing-bindings.rs:45:33
Expand Down Expand Up @@ -135,14 +143,6 @@ LL | let (A(A(a, b) | B(c), d) | B(e)) = Y;
| |
| variable not in all patterns

error[E0408]: variable `c` is not bound in all patterns
--> $DIR/missing-bindings.rs:45:33
|
LL | let (A(A(a, b) | B(c), d) | B(e)) = Y;
| - ^^^^ pattern doesn't bind `c`
| |
| variable not in all patterns

error[E0408]: variable `a` is not bound in all patterns
--> $DIR/missing-bindings.rs:61:29
|
Expand Down Expand Up @@ -185,6 +185,28 @@ LL | B(b),
LL | B(_)
| ^^^^ pattern doesn't bind `b`

error[E0408]: variable `c` is not bound in all patterns
--> $DIR/missing-bindings.rs:57:13
|
LL | / V1(
LL | |
LL | |
LL | | A(
... |
LL | | B(Ok(a) | Err(a))
LL | | ) |
| |_____________^ pattern doesn't bind `c`
LL | / V2(
LL | | A(
LL | | A(_, a) |
LL | | B(b),
... |
LL | |
LL | | ) |
| |_____________^ pattern doesn't bind `c`
LL | V3(c),
| - variable not in all patterns

error[E0408]: variable `a` is not bound in all patterns
--> $DIR/missing-bindings.rs:76:13
|
Expand Down Expand Up @@ -215,28 +237,6 @@ LL | B(b),
LL | V3(c),
| ^^^^^ pattern doesn't bind `b`

error[E0408]: variable `c` is not bound in all patterns
--> $DIR/missing-bindings.rs:57:13
|
LL | / V1(
LL | |
LL | |
LL | | A(
... |
LL | | B(Ok(a) | Err(a))
LL | | ) |
| |_____________^ pattern doesn't bind `c`
LL | / V2(
LL | | A(
LL | | A(_, a) |
LL | | B(b),
... |
LL | |
LL | | ) |
| |_____________^ pattern doesn't bind `c`
LL | V3(c),
| - variable not in all patterns

error: aborting due to 26 previous errors

For more information about this error, try `rustc --explain E0408`.
18 changes: 9 additions & 9 deletions tests/ui/resolve/resolve-inconsistent-names.stderr
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Expand Up @@ -14,6 +14,15 @@ LL | a | b => {}
| |
| pattern doesn't bind `b`

error[E0408]: variable `c` is not bound in all patterns
--> $DIR/resolve-inconsistent-names.rs:19:9
|
LL | (A, B) | (ref B, c) | (c, A) => ()
| ^^^^^^ - - variable not in all patterns
| | |
| | variable not in all patterns
| pattern doesn't bind `c`

error[E0408]: variable `A` is not bound in all patterns
--> $DIR/resolve-inconsistent-names.rs:19:18
|
Expand All @@ -37,15 +46,6 @@ LL | (A, B) | (ref B, c) | (c, A) => ()
| | variable not in all patterns
| variable not in all patterns

error[E0408]: variable `c` is not bound in all patterns
--> $DIR/resolve-inconsistent-names.rs:19:9
|
LL | (A, B) | (ref B, c) | (c, A) => ()
| ^^^^^^ - - variable not in all patterns
| | |
| | variable not in all patterns
| pattern doesn't bind `c`

error[E0409]: variable `B` is bound inconsistently across alternatives separated by `|`
--> $DIR/resolve-inconsistent-names.rs:19:23
|
Expand Down
20 changes: 10 additions & 10 deletions tests/ui/span/issue-39698.stderr
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@@ -1,3 +1,13 @@
error[E0408]: variable `c` is not bound in all patterns
--> $DIR/issue-39698.rs:10:9
|
LL | T::T1(a, d) | T::T2(d, b) | T::T3(c) | T::T4(a) => { println!("{:?}", a); }
| ^^^^^^^^^^^ ^^^^^^^^^^^ - ^^^^^^^^ pattern doesn't bind `c`
| | | |
| | | variable not in all patterns
| | pattern doesn't bind `c`
| pattern doesn't bind `c`

error[E0408]: variable `d` is not bound in all patterns
--> $DIR/issue-39698.rs:10:37
|
Expand Down Expand Up @@ -28,16 +38,6 @@ LL | T::T1(a, d) | T::T2(d, b) | T::T3(c) | T::T4(a) => { println!("{:?}
| | variable not in all patterns
| pattern doesn't bind `b`

error[E0408]: variable `c` is not bound in all patterns
--> $DIR/issue-39698.rs:10:9
|
LL | T::T1(a, d) | T::T2(d, b) | T::T3(c) | T::T4(a) => { println!("{:?}", a); }
| ^^^^^^^^^^^ ^^^^^^^^^^^ - ^^^^^^^^ pattern doesn't bind `c`
| | | |
| | | variable not in all patterns
| | pattern doesn't bind `c`
| pattern doesn't bind `c`

error: aborting due to 4 previous errors

For more information about this error, try `rustc --explain E0408`.
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