[llvm] r226401 - [PowerPC] Add some FIXMEs for fastcc and FPR <-> GPR moves

[Hal Finkel]

Author: hfinkel
Date: Sun Jan 18 08:31:10 2015
New Revision: 226401

URL: http://llvm.org/viewvc/llvm-project?rev=226401&view=rev
Log:
[PowerPC] Add some FIXMEs for fastcc and FPR <-> GPR moves

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.

Modified:
    llvm/trunk/lib/Target/PowerPC/PPCISelLowering.cpp

Modified: llvm/trunk/lib/Target/PowerPC/PPCISelLowering.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/PowerPC/PPCISelLowering.cpp?rev=226401&r1=226400&r2=226401&view=diff
==============================================================================
--- llvm/trunk/lib/Target/PowerPC/PPCISelLowering.cpp (original)
+++ llvm/trunk/lib/Target/PowerPC/PPCISelLowering.cpp Sun Jan 18 08:31:10 2015
@@ -2858,6 +2858,9 @@ PPCTargetLowering::LowerFormalArguments_
         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(SDVa
       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.