Add fastcc cc: pass and return VFP / NEON values in registers. Controlled by -arm-fastcc for now.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117119 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/ARMISelLowering.cpp b/lib/Target/ARM/ARMISelLowering.cpp
index c01a9dd..ceddca0 100644
--- a/lib/Target/ARM/ARMISelLowering.cpp
+++ b/lib/Target/ARM/ARMISelLowering.cpp
@@ -69,6 +69,10 @@
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 @@
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);
}
}