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[Driver][LoongArch] Enable linker relaxation by default for loongarch64 (#156315)

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ZhaoQi 2025-09-05 14:14:21 +08:00 committed by GitHub
parent 33a583d377
commit a4f4d5ed94
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6 changed files with 27 additions and 29 deletions
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1
clang/docs/ReleaseNotes.rst
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@ -391,6 +391,7 @@ Windows Support
LoongArch Support
^^^^^^^^^^^^^^^^^
- Enable linker relaxation by default for loongarch64.
RISC-V Support
^^^^^^^^^^^^^^

29
clang/lib/Driver/ToolChains/Arch/LoongArch.cpp
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@ -134,22 +134,19 @@ void loongarch::getLoongArchTargetFeatures(const Driver &D,
(!Args.hasArgNoClaim(clang::driver::options::OPT_march_EQ)))
Features.push_back("+lsx");
// FIXME: Now we must use -mrelax to enable relax, maybe -mrelax will be set
// as default in the future.
if (const Arg *A =
Args.getLastArg(options::OPT_mrelax, options::OPT_mno_relax)) {
if (A->getOption().matches(options::OPT_mrelax)) {
Features.push_back("+relax");
// -gsplit-dwarf -mrelax requires DW_AT_high_pc/DW_AT_ranges/... indexing
// into .debug_addr, which is currently not implemented.
Arg *A;
if (getDebugFissionKind(D, Args, A) != DwarfFissionKind::None)
D.Diag(
clang::diag::err_drv_loongarch_unsupported_with_linker_relaxation)
<< A->getAsString(Args);
} else {
Features.push_back("-relax");
}
// -mrelax is default, unless -mno-relax is specified.
// FIXME: Only for loongarch64, loongarch32 has not been fully verified.
if (Args.hasFlag(options::OPT_mrelax, options::OPT_mno_relax,
Triple.isLoongArch64() ? true : false)) {
Features.push_back("+relax");
// -gsplit-dwarf -mrelax requires DW_AT_high_pc/DW_AT_ranges/... indexing
// into .debug_addr, which is currently not implemented.
Arg *A;
if (getDebugFissionKind(D, Args, A) != DwarfFissionKind::None)
D.Diag(clang::diag::err_drv_loongarch_unsupported_with_linker_relaxation)
<< A->getAsString(Args);
} else if (Args.getLastArg(options::OPT_mno_relax)) {
Features.push_back("-relax");
}
std::string ArchName;

2
clang/test/Driver/loongarch-features.c
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@ -2,7 +2,7 @@
// RUN: %clang --target=loongarch64 -S -emit-llvm %s -o - | FileCheck %s --check-prefix=LA64
// LA32: "target-features"="+32bit"
// LA64: "target-features"="+64bit,+d,+f,+lsx,+ual"
// LA64: "target-features"="+64bit,+d,+f,+lsx,+relax,+ual"
int foo(void) {
return 3;

20
clang/test/Driver/loongarch-march.c
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@ -21,39 +21,39 @@
// CC1-LOONGARCH64: "-target-cpu" "loongarch64"
// CC1-LOONGARCH64-NOT: "-target-feature"
// CC1-LOONGARCH64: "-target-feature" "+64bit" "-target-feature" "+f" "-target-feature" "+d" "-target-feature" "+ual"
// CC1-LOONGARCH64: "-target-feature" "+relax" "-target-feature" "+64bit" "-target-feature" "+f" "-target-feature" "+d" "-target-feature" "+ual"
// CC1-LOONGARCH64-NOT: "-target-feature"
// CC1-LOONGARCH64: "-target-abi" "lp64d"
// CC1-LA464: "-target-cpu" "la464"
// CC1-LA464-NOT: "-target-feature"
// CC1-LA464: "-target-feature" "+64bit" "-target-feature" "+f" "-target-feature" "+d" "-target-feature" "+lsx" "-target-feature" "+lasx" "-target-feature" "+ual"
// CC1-LA464: "-target-feature" "+relax" "-target-feature" "+64bit" "-target-feature" "+f" "-target-feature" "+d" "-target-feature" "+lsx" "-target-feature" "+lasx" "-target-feature" "+ual"
// CC1-LA464-NOT: "-target-feature"
// CC1-LA464: "-target-abi" "lp64d"
// CC1-LA64V1P0: "-target-cpu" "loongarch64"
// CC1-LA64V1P0-NOT: "-target-feature"
// CC1-LA64V1P0: "-target-feature" "+64bit" "-target-feature" "+d" "-target-feature" "+lsx" "-target-feature" "+ual"
// CC1-LA64V1P0: "-target-feature" "+relax" "-target-feature" "+64bit" "-target-feature" "+d" "-target-feature" "+lsx" "-target-feature" "+ual"
// CC1-LA64V1P0-NOT: "-target-feature"
// CC1-LA64V1P0: "-target-abi" "lp64d"
// CC1-LA64V1P1: "-target-cpu" "loongarch64"
// CC1-LA64V1P1-NOT: "-target-feature"
// CC1-LA64V1P1: "-target-feature" "+64bit" "-target-feature" "+d" "-target-feature" "+lsx" "-target-feature" "+ual" "-target-feature" "+frecipe" "-target-feature" "+lam-bh" "-target-feature" "+lamcas" "-target-feature" "+ld-seq-sa" "-target-feature" "+div32" "-target-feature" "+scq"
// CC1-LA64V1P1: "-target-feature" "+relax" "-target-feature" "+64bit" "-target-feature" "+d" "-target-feature" "+lsx" "-target-feature" "+ual" "-target-feature" "+frecipe" "-target-feature" "+lam-bh" "-target-feature" "+lamcas" "-target-feature" "+ld-seq-sa" "-target-feature" "+div32" "-target-feature" "+scq"
// CC1-LA64V1P1-NOT: "-target-feature"
// CC1-LA64V1P1: "-target-abi" "lp64d"
// CC1-LA664: "-target-cpu" "la664"
// CC1-LA664-NOT: "-target-feature"
// CC1-LA664: "-target-feature" "+64bit" "-target-feature" "+f" "-target-feature" "+d" "-target-feature" "+lsx" "-target-feature" "+lasx" "-target-feature" "+ual" "-target-feature" "+frecipe" "-target-feature" "+lam-bh" "-target-feature" "+lamcas" "-target-feature" "+ld-seq-sa" "-target-feature" "+div32" "-target-feature" "+scq"
// CC1-LA664: "-target-feature" "+relax" "-target-feature" "+64bit" "-target-feature" "+f" "-target-feature" "+d" "-target-feature" "+lsx" "-target-feature" "+lasx" "-target-feature" "+ual" "-target-feature" "+frecipe" "-target-feature" "+lam-bh" "-target-feature" "+lamcas" "-target-feature" "+ld-seq-sa" "-target-feature" "+div32" "-target-feature" "+scq"
// CC1-LA664-NOT: "-target-feature"
// CC1-LA664: "-target-abi" "lp64d"
// IR-LOONGARCH64: attributes #[[#]] ={{.*}}"target-cpu"="loongarch64" {{.*}}"target-features"="+64bit,+d,+f,+ual"
// IR-LA464: attributes #[[#]] ={{.*}}"target-cpu"="la464" {{.*}}"target-features"="+64bit,+d,+f,+lasx,+lsx,+ual"
// IR-LA64V1P0: attributes #[[#]] ={{.*}}"target-cpu"="loongarch64" {{.*}}"target-features"="+64bit,+d,+lsx,+ual"
// IR-LA64V1P1: attributes #[[#]] ={{.*}}"target-cpu"="loongarch64" {{.*}}"target-features"="+64bit,+d,+div32,+frecipe,+lam-bh,+lamcas,+ld-seq-sa,+lsx,+scq,+ual"
// IR-LA664: attributes #[[#]] ={{.*}}"target-cpu"="la664" {{.*}}"target-features"="+64bit,+d,+div32,+f,+frecipe,+lam-bh,+lamcas,+lasx,+ld-seq-sa,+lsx,+scq,+ual"
// IR-LOONGARCH64: attributes #[[#]] ={{.*}}"target-cpu"="loongarch64" {{.*}}"target-features"="+64bit,+d,+f,+relax,+ual"
// IR-LA464: attributes #[[#]] ={{.*}}"target-cpu"="la464" {{.*}}"target-features"="+64bit,+d,+f,+lasx,+lsx,+relax,+ual"
// IR-LA64V1P0: attributes #[[#]] ={{.*}}"target-cpu"="loongarch64" {{.*}}"target-features"="+64bit,+d,+lsx,+relax,+ual"
// IR-LA64V1P1: attributes #[[#]] ={{.*}}"target-cpu"="loongarch64" {{.*}}"target-features"="+64bit,+d,+div32,+frecipe,+lam-bh,+lamcas,+ld-seq-sa,+lsx,+relax,+scq,+ual"
// IR-LA664: attributes #[[#]] ={{.*}}"target-cpu"="la664" {{.*}}"target-features"="+64bit,+d,+div32,+f,+frecipe,+lam-bh,+lamcas,+lasx,+ld-seq-sa,+lsx,+relax,+scq,+ual"
int foo(void) {
return 3;

2
clang/test/Driver/loongarch-relax-features.c
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@ -17,7 +17,7 @@
// RUN: not %clang -c --target=loongarch64 -mrelax -gsplit-dwarf=single %s 2>&1 | FileCheck %s --check-prefix=ERR-SPLIT-DWARF
// LA32: "target-features"="+32bit"
// LA64: "target-features"="+64bit,+d,+f,+lsx,+ual"
// LA64: "target-features"="+64bit,+d,+f,+lsx,+relax,+ual"
// LA32-NORELAX: "target-features"="+32bit,-relax"
// LA64-NORELAX: "target-features"="+64bit,+d,+f,+lsx,+ual,-relax"

2
flang/test/Driver/target-cpu-features.f90
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@ -95,7 +95,7 @@
! CHECK-AMDGPU-R600-SAME: "-target-cpu" "cayman"
! CHECK-LOONGARCH64: "-fc1" "-triple" "loongarch64-unknown-linux-gnu"
! CHECK-LOONGARCH64-SAME: "-target-cpu" "loongarch64" "-target-feature" "+lsx" "-target-feature" "+64bit" "-target-feature" "+f" "-target-feature" "+d" "-target-feature" "+ual"
! CHECK-LOONGARCH64-SAME: "-target-cpu" "loongarch64" "-target-feature" "+lsx" "-target-feature" "+relax" "-target-feature" "+64bit" "-target-feature" "+f" "-target-feature" "+d" "-target-feature" "+ual"
! CHECK-SPARC-VIS: "-fc1" "-triple" "sparc64-{{[^"]+}}"
! CHECK-SPARC-VIS-SAME: "-target-feature" "+vis"