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[PowerPC] Add some FIXMEs for fastcc and FPR <-> GPR moves

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So we don't forget, once we support FPR <-> GPR moves on the P8, we'll likely
want to re-visit this part of the calling convention.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@226401 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Hal Finkel 2015-01-18 14:31:10 +00:00
parent 65a3a9bea3
commit 180f89537a
1 changed files with 6 additions and 0 deletions
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6
lib/Target/PowerPC/PPCISelLowering.cpp
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@ -2858,6 +2858,9 @@ PPCTargetLowering::LowerFormalArguments_64SVR4(
ArgVal = DAG.getCopyFromReg(Chain, dl, VReg, ObjectVT);
++FPR_idx;
} else if (GPR_idx != Num_GPR_Regs && CallConv != CallingConv::Fast) {
// FIXME: We may want to re-enable this for CallingConv::Fast on the P8
// once we support fp <-> gpr moves.
// This can only ever happen in the presence of f32 array types,
// since otherwise we never run out of FPRs before running out
// of GPRs.
@ -4629,6 +4632,9 @@ PPCTargetLowering::LowerCall_64SVR4(SDValue Chain, SDValue Callee,
if (!NeedGPROrStack)
;
else if (GPR_idx != NumGPRs && CallConv != CallingConv::Fast) {
// FIXME: We may want to re-enable this for CallingConv::Fast on the P8
// once we support fp <-> gpr moves.
// In the non-vararg case, this can only ever happen in the
// presence of f32 array types, since otherwise we never run
// out of FPRs before running out of GPRs.