[llvm] 4fdaac0 - [PowerPC][NFC] Remove Darwin specific logic in frame finalization.

[Sean Fertile via llvm-commits]

Author: Sean Fertile
Date: 2020-02-21T09:32:24-05:00
New Revision: 4fdaac0e1eb8e75fe59de0bd01cf72329dacbdb4

URL: https://github.com/llvm/llvm-project/commit/4fdaac0e1eb8e75fe59de0bd01cf72329dacbdb4
DIFF: https://github.com/llvm/llvm-project/commit/4fdaac0e1eb8e75fe59de0bd01cf72329dacbdb4.diff

LOG: [PowerPC][NFC] Remove Darwin specific logic in frame finalization.

Remove some cumbersome Darwin specific logic for updating the frame
offsets of the condition-register spill slots. The containing function has an
early return if the subtarget is not ELF based which makes the Darwin logic
dead.

Added: 
    

Modified: 
    llvm/lib/Target/PowerPC/PPCFrameLowering.cpp

Removed: 
    


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diff  --git a/llvm/lib/Target/PowerPC/PPCFrameLowering.cpp b/llvm/lib/Target/PowerPC/PPCFrameLowering.cpp
index 6c49fce838ae..de79752541dd 100644
--- a/llvm/lib/Target/PowerPC/PPCFrameLowering.cpp
+++ b/llvm/lib/Target/PowerPC/PPCFrameLowering.cpp
@@ -1990,19 +1990,13 @@ void PPCFrameLowering::processFunctionBeforeFrameFinalized(MachineFunction &MF,
   // to the stack pointer and hence does not need an adjustment here.
   // Only CR2 (the first nonvolatile spilled) has an associated frame
   // index so that we have a single uniform save area.
-  if (spillsCR(MF) && !(Subtarget.isPPC64() && Subtarget.isSVR4ABI())) {
+  if (spillsCR(MF) && Subtarget.is32BitELFABI()) {
     // Adjust the frame index of the CR spill slot.
-    for (unsigned i = 0, e = CSI.size(); i != e; ++i) {
-      unsigned Reg = CSI[i].getReg();
-
-      if ((Subtarget.isSVR4ABI() && Reg == PPC::CR2)
-          // Leave Darwin logic as-is.
-          || (!Subtarget.isSVR4ABI() &&
-              (PPC::CRBITRCRegClass.contains(Reg) ||
-               PPC::CRRCRegClass.contains(Reg)))) {
-        int FI = CSI[i].getFrameIdx();
-
+    for (const auto &CSInfo : CSI) {
+      if (CSInfo.getReg() == PPC::CR2) {
+        int FI = CSInfo.getFrameIdx();
         MFI.setObjectOffset(FI, LowerBound + MFI.getObjectOffset(FI));
+        break;
       }
     }