Commit cb494e4e authored by Hans Wennborg's avatar Hans Wennborg
Browse files

Merging r322223: 

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r322223 | matze | 2018-01-10 12:49:57 -0800 (Wed, 10 Jan 2018) | 5 lines

TargetLoweringBase: The ios simulator has no bzero function.

Make sure I really get back to the beahvior before my rewrite in r321035
which turned out not to be completely NFC as I changed the behavior for
the ios simulator environment.
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llvm-svn: 322681
parent 95aeee71

llvm/lib/CodeGen/TargetLoweringBase.cpp

+12 −3
Original line number Diff line number Diff line
@@ -132,9 +132,18 @@ void TargetLoweringBase::InitLibcalls(const Triple &TT) { 
    setLibcallName(RTLIB::FPEXT_F16_F32, "__extendhfsf2");

    setLibcallName(RTLIB::FPROUND_F32_F16, "__truncsfhf2");



    // Darwin 10 and higher has an optimized __bzero.

    if (!TT.isMacOSX() || !TT.isMacOSXVersionLT(10, 6) || TT.isArch64Bit()) {

      setLibcallName(RTLIB::BZERO, TT.isAArch64() ? "bzero" : "__bzero");

    // Some darwins have an optimized __bzero/bzero function.

    switch (TT.getArch()) {

    case Triple::x86:

    case Triple::x86_64:

      if (TT.isMacOSX() && !TT.isMacOSXVersionLT(10, 6))

        setLibcallName(RTLIB::BZERO, "__bzero");

      break;

    case Triple::aarch64:

      setLibcallName(RTLIB::BZERO, "bzero");

      break;

    default:

      break;

    }



    if (darwinHasSinCos(TT)) {

llvm/test/CodeGen/X86/darwin-bzero.ll

+6 −3
Original line number Diff line number Diff line 
; RUN: llc < %s -mtriple=i386-apple-darwin10 | FileCheck %s

; RUN: llc < %s -mtriple=x86_64-apple-darwin10 | FileCheck %s

; RUN: llc < %s -mtriple=i386-apple-darwin10 | FileCheck -check-prefixes=CHECK,BZERO %s

; RUN: llc < %s -mtriple=x86_64-apple-darwin10 | FileCheck -check-prefixes=CHECK,BZERO %s

; RUN: llc < %s -mtriple=x86_64-unknown-unknown | FileCheck -check-prefixes=CHECK,NOBZERO %s

; RUN: llc < %s -mtriple=x86_64-apple-ios10.0-simulator | FileCheck -check-prefixes=CHECK,NOBZERO %s



declare void @llvm.memset.p0i8.i32(i8* nocapture, i8, i32, i32, i1) nounwind



; CHECK-LABEL: foo:

; CHECK: {{calll|callq}} ___bzero

; BZERO: {{calll|callq}} ___bzero

; NOBZERO-NOT: bzero

define void @foo(i8* %p, i32 %len) {

  call void @llvm.memset.p0i8.i32(i8* %p, i8 0, i32 %len, i32 1, i1 false)

  ret void