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Add fastcc cc: pass and return VFP / NEON values in registers. Controlled by -arm-fastcc for now.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117119 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng
2010-10-22 18:23:05 +00:00
parent 81faa805ce
commit 76f920d316
2 changed files with 51 additions and 12 deletions
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34
lib/Target/ARM/ARMISelLowering.cpp
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@@ -69,6 +69,10 @@ ARMInterworking("arm-interworking", cl::Hidden,
cl::desc("Enable / disable ARM interworking (for debugging only)"),
cl::init(true));
static cl::opt<bool>
ARMFastCC("arm-fastcc", cl::Hidden,
cl::desc("Use AAPCS / AAPCS-VFP calling conventions for fastcc"));
void ARMTargetLowering::addTypeForNEON(EVT VT, EVT PromotedLdStVT,
EVT PromotedBitwiseVT) {
if (VT != PromotedLdStVT) {
@@ -955,23 +959,29 @@ CCAssignFn *ARMTargetLowering::CCAssignFnForNode(CallingConv::ID CC,
switch (CC) {
default:
llvm_unreachable("Unsupported calling convention");
case CallingConv::C:
case CallingConv::Fast:
if (ARMFastCC && Subtarget->hasVFP2() && !isVarArg) {
if (!Subtarget->isAAPCS_ABI())
return (Return ? RetFastCC_ARM_APCS : FastCC_ARM_APCS);
// For AAPCS ABI targets, just use VFP variant of the calling convention.
return (Return ? RetCC_ARM_AAPCS_VFP : CC_ARM_AAPCS_VFP);
}
// Fallthrough
case CallingConv::C: {
// Use target triple & subtarget features to do actual dispatch.
if (Subtarget->isAAPCS_ABI()) {
if (Subtarget->hasVFP2() &&
FloatABIType == FloatABI::Hard && !isVarArg)
return (Return ? RetCC_ARM_AAPCS_VFP: CC_ARM_AAPCS_VFP);
else
return (Return ? RetCC_ARM_AAPCS: CC_ARM_AAPCS);
} else
return (Return ? RetCC_ARM_APCS: CC_ARM_APCS);
if (!Subtarget->isAAPCS_ABI())
return (Return ? RetCC_ARM_APCS : CC_ARM_APCS);
else if (Subtarget->hasVFP2() &&
FloatABIType == FloatABI::Hard && !isVarArg)
return (Return ? RetCC_ARM_AAPCS_VFP : CC_ARM_AAPCS_VFP);
return (Return ? RetCC_ARM_AAPCS : CC_ARM_AAPCS);
}
case CallingConv::ARM_AAPCS_VFP:
return (Return ? RetCC_ARM_AAPCS_VFP: CC_ARM_AAPCS_VFP);
return (Return ? RetCC_ARM_AAPCS_VFP : CC_ARM_AAPCS_VFP);
case CallingConv::ARM_AAPCS:
return (Return ? RetCC_ARM_AAPCS: CC_ARM_AAPCS);
return (Return ? RetCC_ARM_AAPCS : CC_ARM_AAPCS);
case CallingConv::ARM_APCS:
return (Return ? RetCC_ARM_APCS: CC_ARM_APCS);
return (Return ? RetCC_ARM_APCS : CC_ARM_APCS);
}
}