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[RISCV][Clang] Remove -save-restore from default features. (#76390)

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It's unnecessary to defaultly pass feature `-save-restore`, since risc-v
backend defaultly disables save-restore functionality.
This commit is contained in:
Yeting Kuo
2023-12-27 09:12:35 +08:00
committed by GitHub
parent 256bf56afa
commit ce0c149f65
3 changed files with 1 additions and 10 deletions
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7
clang/lib/Driver/ToolChains/Arch/RISCV.cpp
View File

@@ -167,13 +167,6 @@ void riscv::getRISCVTargetFeatures(const Driver &D, const llvm::Triple &Triple,
Features.push_back("-relax");
}
// GCC Compatibility: -mno-save-restore is default, unless -msave-restore is
// specified.
if (Args.hasFlag(options::OPT_msave_restore, options::OPT_mno_save_restore, false))
Features.push_back("+save-restore");
else
Features.push_back("-save-restore");
// -mno-unaligned-access is default, unless -munaligned-access is specified.
AddTargetFeature(Args, Features, options::OPT_munaligned_access,
options::OPT_mno_unaligned_access, "fast-unaligned-access");

2
clang/test/Driver/riscv-default-features.c
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@@ -2,9 +2,7 @@
// RUN: %clang --target=riscv64-unknown-elf -S -emit-llvm %s -o - | FileCheck %s -check-prefix=RV64
// RV32: "target-features"="+32bit,+a,+c,+m,+relax,
// RV32-SAME: -save-restore
// RV64: "target-features"="+64bit,+a,+c,+m,+relax,
// RV64-SAME: -save-restore
// Dummy function
int foo(void){

2
clang/test/Driver/riscv-features.c
View File

@@ -24,7 +24,7 @@
// SAVE-RESTORE: "-target-feature" "+save-restore"
// NO-SAVE-RESTORE: "-target-feature" "-save-restore"
// DEFAULT: "-target-feature" "-save-restore"
// DEFAULT-NOT: "-target-feature" "-save-restore"
// DEFAULT-NOT: "-target-feature" "+save-restore"
// RUN: %clang --target=riscv32-unknown-elf -### %s -munaligned-access 2>&1 | FileCheck %s -check-prefix=FAST-UNALIGNED-ACCESS