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[AArch64][VecLib] Add libmvec support for AArch64 targets #143696

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Merged
merged 3 commits into from
Jun 17, 2025
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[AArch64][VecLib] Add libmvec support for AArch64 targets #143696

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02b08f2
[AArch64][VecLib] Add libmvec support for AArch64 targets
marykass-arm Jun 5, 2025
95453d8
Merge VF2, VF4 and Scalable libmvec function macros
marykass-arm Jun 12, 2025
8264797
Added test cases for <2 x float> vectors, fixed typos in function map…
marykass-arm Jun 16, 2025
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2 changes: 2 additions & 0 deletions clang/docs/ReleaseNotes.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -357,6 +357,8 @@ Modified Compiler Flags

- The ``-fchar8_t`` flag is no longer considered in non-C++ languages modes. (#GH55373)

- The ``-fveclib=libmvec`` option now supports AArch64 targets (requires GLIBC 2.40 or newer).

Removed Compiler Flags
-------------------------

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5 changes: 3 additions & 2 deletions clang/include/clang/Driver/Options.td
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Expand Up @@ -3473,8 +3473,9 @@ def fveclib : Joined<["-"], "fveclib=">, Group<f_Group>,
Visibility<[ClangOption, CC1Option, FlangOption, FC1Option]>,
HelpText<"Use the given vector functions library">,
HelpTextForVariants<[ClangOption, CC1Option],
"Use the given vector functions library. "
"Note: -fveclib={ArmPL,SLEEF} implies -fno-math-errno">,
"Use the given vector functions library.\n"
" Note: -fveclib={ArmPL,SLEEF,libmvec} implies -fno-math-errno.\n"
" Note: -fveclib=libmvec on AArch64 requires GLIBC 2.40 or newer.">,
Values<"Accelerate,libmvec,MASSV,SVML,SLEEF,Darwin_libsystem_m,ArmPL,AMDLIBM,none">,
NormalizedValuesScope<"llvm::driver::VectorLibrary">,
NormalizedValues<["Accelerate", "LIBMVEC", "MASSV", "SVML", "SLEEF",
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9 changes: 8 additions & 1 deletion clang/lib/Driver/ToolChains/Clang.cpp
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Expand Up @@ -5683,11 +5683,18 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA,
Triple.getArch() != llvm::Triple::x86_64)
D.Diag(diag::err_drv_unsupported_opt_for_target)
<< Name << Triple.getArchName();
} else if (Name == "libmvec" || Name == "AMDLIBM") {
} else if (Name == "AMDLIBM") {
if (Triple.getArch() != llvm::Triple::x86 &&
Triple.getArch() != llvm::Triple::x86_64)
D.Diag(diag::err_drv_unsupported_opt_for_target)
<< Name << Triple.getArchName();
} else if (Name == "libmvec") {
if (Triple.getArch() != llvm::Triple::x86 &&
Triple.getArch() != llvm::Triple::x86_64 &&
Triple.getArch() != llvm::Triple::aarch64 &&
Triple.getArch() != llvm::Triple::aarch64_be)
D.Diag(diag::err_drv_unsupported_opt_for_target)
<< Name << Triple.getArchName();
} else if (Name == "SLEEF" || Name == "ArmPL") {
if (Triple.getArch() != llvm::Triple::aarch64 &&
Triple.getArch() != llvm::Triple::aarch64_be &&
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10 changes: 9 additions & 1 deletion clang/test/Driver/fveclib.c
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@@ -1,6 +1,7 @@
// RUN: %clang -### -c -fveclib=none %s 2>&1 | FileCheck --check-prefix=CHECK-NOLIB %s
// RUN: %clang -### -c -fveclib=Accelerate %s 2>&1 | FileCheck --check-prefix=CHECK-ACCELERATE %s
// RUN: %clang -### -c --target=x86_64-unknown-linux-gnu -fveclib=libmvec %s 2>&1 | FileCheck --check-prefix=CHECK-libmvec %s
// RUN: %clang -### -c --target=aarch64-linux-gnu -fveclib=libmvec %s 2>&1 | FileCheck --check-prefix=CHECK-LIBMVEC-AARCH64 %s
// RUN: %clang -### -c --target=x86_64-unknown-linux-gnu -fveclib=AMDLIBM %s 2>&1 | FileCheck --check-prefix=CHECK-AMDLIBM %s
// RUN: %clang -### -c -fveclib=MASSV %s 2>&1 | FileCheck --check-prefix=CHECK-MASSV %s
// RUN: %clang -### -c -fveclib=Darwin_libsystem_m %s 2>&1 | FileCheck --check-prefix=CHECK-DARWIN_LIBSYSTEM_M %s
Expand All @@ -12,6 +13,7 @@
// CHECK-NOLIB: "-fveclib=none"
// CHECK-ACCELERATE: "-fveclib=Accelerate"
// CHECK-libmvec: "-fveclib=libmvec"
// CHECK-LIBMVEC-AARCH64: "-fveclib=libmvec"
// CHECK-AMDLIBM: "-fveclib=AMDLIBM"
// CHECK-MASSV: "-fveclib=MASSV"
// CHECK-DARWIN_LIBSYSTEM_M: "-fveclib=Darwin_libsystem_m"
Expand All @@ -23,7 +25,6 @@

// RUN: not %clang --target=x86 -c -fveclib=SLEEF %s 2>&1 | FileCheck --check-prefix=CHECK-ERROR %s
// RUN: not %clang --target=x86 -c -fveclib=ArmPL %s 2>&1 | FileCheck --check-prefix=CHECK-ERROR %s
// RUN: not %clang --target=aarch64 -c -fveclib=libmvec %s 2>&1 | FileCheck --check-prefix=CHECK-ERROR %s
// RUN: not %clang --target=aarch64 -c -fveclib=SVML %s 2>&1 | FileCheck --check-prefix=CHECK-ERROR %s
// RUN: not %clang --target=aarch64 -c -fveclib=AMDLIBM %s 2>&1 | FileCheck --check-prefix=CHECK-ERROR %s
// CHECK-ERROR: unsupported option {{.*}} for target
Expand All @@ -43,6 +44,9 @@
// RUN: %clang -### --target=x86_64-unknown-linux-gnu -fveclib=libmvec -flto %s 2>&1 | FileCheck --check-prefix=CHECK-LTO-LIBMVEC %s
// CHECK-LTO-LIBMVEC: "-plugin-opt=-vector-library=LIBMVEC"

// RUN: %clang -### --target=aarch64-linux-gnu -fveclib=libmvec -flto %s 2>&1 | FileCheck --check-prefix=CHECK-LTO-LIBMVEC-AARCH64 %s
// CHECK-LTO-LIBMVEC-AARCH64: "-plugin-opt=-vector-library=LIBMVEC"

// RUN: %clang -### --target=x86_64-unknown-linux-gnu -fveclib=AMDLIBM -flto %s 2>&1 | FileCheck --check-prefix=CHECK-LTO-AMDLIBM %s
// CHECK-LTO-AMDLIBM: "-plugin-opt=-vector-library=AMDLIBM"

Expand All @@ -68,6 +72,10 @@
// CHECK-ERRNO-LIBMVEC: "-fveclib=libmvec"
// CHECK-ERRNO-LIBMVEC-SAME: "-fmath-errno"

// RUN: %clang -### --target=aarch64-linux-gnu -fveclib=libmvec %s 2>&1 | FileCheck --check-prefix=CHECK-ERRNO-LIBMVEC-AARCH64 %s
// CHECK-ERRNO-LIBMVEC-AARCH64: "-fveclib=libmvec"
// CHECK-ERRNO-LIBMVEC-AARCH64-SAME: "-fmath-errno"

// RUN: %clang -### --target=x86_64-unknown-linux-gnu -fveclib=AMDLIBM %s 2>&1 | FileCheck --check-prefix=CHECK-ERRNO-AMDLIBM %s
// CHECK-ERRNO-AMDLIBM: "-fveclib=AMDLIBM"
// CHECK-ERRNO-AMDLIBM-SAME: "-fmath-errno"
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