[all-commits] [llvm/llvm-project] cc5391: [CodeGen] Use __extendhfsf2 and __truncsfhf2 by de...

[Nikita Popov via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: cc539138acf742f53ef455147182a8de11980a02
      https://github.com/llvm/llvm-project/commit/cc539138acf742f53ef455147182a8de11980a02
  Author: Nikita Popov <npopov at redhat.com>
  Date:   2025-02-19 (Wed, 19 Feb 2025)

  Changed paths:
    A lld/test/wasm/lto/Inputs/libcall-return-addr.ll
    R lld/test/wasm/lto/Inputs/libcall-truncsfhf2.ll
    A lld/test/wasm/lto/libcall-return-addr.ll
    R lld/test/wasm/lto/libcall-truncsfhf2.ll
    M llvm/include/llvm/IR/RuntimeLibcalls.def
    M llvm/lib/IR/RuntimeLibcalls.cpp
    M llvm/lib/Target/ARM/ARMISelLowering.cpp
    M llvm/lib/Target/Hexagon/HexagonISelLowering.cpp
    M llvm/lib/Target/RISCV/RISCVISelLowering.cpp
    M llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp
    M llvm/lib/Target/WebAssembly/WebAssemblyRuntimeLibcallSignatures.cpp
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/test/CodeGen/AArch64/16bit-float-promotion-with-nofp.ll
    M llvm/test/CodeGen/AArch64/atomicrmw-fadd.ll
    M llvm/test/CodeGen/AArch64/atomicrmw-fmax.ll
    M llvm/test/CodeGen/AArch64/atomicrmw-fmin.ll
    M llvm/test/CodeGen/AArch64/atomicrmw-fsub.ll
    M llvm/test/CodeGen/AArch64/strictfp_f16_abi_promote.ll
    M llvm/test/CodeGen/LoongArch/fp16-promote.ll
    M llvm/test/CodeGen/Mips/fp16-promote.ll
    M llvm/test/CodeGen/Mips/ldexp.ll
    M llvm/test/CodeGen/PowerPC/atomics.ll
    M llvm/test/CodeGen/PowerPC/handle-f16-storage-type.ll
    M llvm/test/CodeGen/PowerPC/pr48519.ll
    M llvm/test/CodeGen/PowerPC/pr49092.ll
    M llvm/test/CodeGen/PowerPC/vector-llrint.ll
    M llvm/test/CodeGen/PowerPC/vector-lrint.ll
    M llvm/test/CodeGen/SPARC/fp16-promote.ll
    M llvm/test/CodeGen/VE/Scalar/fp_extload_truncstore.ll
    M llvm/test/CodeGen/X86/cvt16.ll
    M llvm/test/CodeGen/X86/fmf-flags.ll
    M llvm/test/CodeGen/X86/fp-i129.ll
    M llvm/test/CodeGen/X86/fp128-cast-strict.ll
    M llvm/test/CodeGen/X86/fptosi-sat-scalar.ll
    M llvm/test/CodeGen/X86/fptoui-sat-scalar.ll
    M llvm/test/CodeGen/X86/frem.ll
    M llvm/test/CodeGen/X86/half-constrained.ll
    M llvm/test/CodeGen/X86/ldexp.ll
    M llvm/test/CodeGen/X86/llvm.frexp.ll
    M llvm/unittests/CodeGen/GlobalISel/LegalizerHelperTest.cpp

  Log Message:
  -----------
  [CodeGen] Use __extendhfsf2 and __truncsfhf2 by default (#126880)

The standard libcalls for half to float and float to half conversion are
__extendhfsf2 and __truncsfhf2. However, LLVM currently uses
__gnu_h2f_ieee and __gnu_f2h_ieee instead. As far as I can tell, these
libcalls are an ARM-ism and only provided by libgcc on that platform.
compiler-rt always provides both libcalls.

Use the standard libcalls by default, and only use the __gnu libcalls on
ARM.



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