From: Hal Finkel <hfinkel@anl.gov>
Date: Sun, 18 Jan 2015 14:31:10 +0000 (+0000)
Subject: [PowerPC] Add some FIXMEs for fastcc and FPR <-> GPR moves
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=180f89537ac8a53025b528540746debde034bf62;p=oota-llvm.git

[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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@226401 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/PowerPC/PPCISelLowering.cpp b/lib/Target/PowerPC/PPCISelLowering.cpp
index 58eddd7e910..2001e427705 100644
--- a/lib/Target/PowerPC/PPCISelLowering.cpp
+++ b/lib/Target/PowerPC/PPCISelLowering.cpp
@@ -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.