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Restrict sin/cos optimization to 64-bit only for now. 32-bit is a bit messy and less critical.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173987 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2013-01-30 22:56:35 +00:00
parent bc977bab42
commit a66f40a8cc
2 changed files with 14 additions and 10 deletions
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21
lib/Target/X86/X86ISelLowering.cpp
View File

@ -1294,7 +1294,7 @@ X86TargetLowering::X86TargetLowering(X86TargetMachine &TM)
if (Subtarget->hasSinCos()) {
setLibcallName(RTLIB::SINCOS_F32, "sincosf");
setLibcallName(RTLIB::SINCOS_F64, "sincos");
if (Subtarget->isTargetDarwin() && Subtarget->is64Bit()) {
if (Subtarget->isTargetDarwin()) {
// For MacOSX, we don't want to the normal expansion of a libcall to
// sincos. We want to issue a libcall to __sincos_stret to avoid memory
// traffic.
@ -12037,7 +12037,7 @@ static SDValue LowerADDC_ADDE_SUBC_SUBE(SDValue Op, SelectionDAG &DAG) {
}
SDValue X86TargetLowering::LowerFSINCOS(SDValue Op, SelectionDAG &DAG) const {
assert(Subtarget->isTargetDarwin());
assert(Subtarget->isTargetDarwin() && Subtarget->is64Bit());
// For MacOSX, we want to call an alternative entry point: __sincos_stret,
// which returns the values in two XMM registers.
@ -12054,18 +12054,21 @@ SDValue X86TargetLowering::LowerFSINCOS(SDValue Op, SelectionDAG &DAG) const {
Entry.isSExt = false;
Entry.isZExt = false;
Args.push_back(Entry);
// Only optimize x86_64 for now. i386 is a bit messy. For f32,
// the small struct {f32, f32} is returned in (eax, edx). For f64,
// the results are returned via SRet in memory.
const char *LibcallName = (ArgVT == MVT::f64)
? "__sincos_stret" : "__sincosf_stret";
SDValue Callee = DAG.getExternalSymbol(LibcallName, getPointerTy());
StructType *RetTy = StructType::get(ArgTy, ArgTy, NULL);
TargetLowering::
CallLoweringInfo CLI(DAG.getEntryNode(), RetTy,
false, false, false, false, 0,
CallingConv::C, /*isTaillCall=*/false,
/*doesNotRet=*/false, /*isReturnValueUsed*/true,
Callee, Args, DAG, dl);
CallLoweringInfo CLI(DAG.getEntryNode(), RetTy,
false, false, false, false, 0,
CallingConv::C, /*isTaillCall=*/false,
/*doesNotRet=*/false, /*isReturnValueUsed*/true,
Callee, Args, DAG, dl);
std::pair<SDValue, SDValue> CallResult = LowerCallTo(CLI);
return CallResult.first;
}

3
lib/Target/X86/X86Subtarget.cpp
View File

@ -157,7 +157,8 @@ const char *X86Subtarget::getBZeroEntry() const {
bool X86Subtarget::hasSinCos() const {
return getTargetTriple().isMacOSX() &&
!getTargetTriple().isMacOSXVersionLT(10, 9);
!getTargetTriple().isMacOSXVersionLT(10, 9) &&
is64Bit();
}
/// IsLegalToCallImmediateAddr - Return true if the subtarget allows calls