Subzero: Improve handling of alloca instructions of constant size.

src/IceTargetLoweringARM32.h

Index: src/IceTargetLoweringARM32.h
diff --git a/src/IceTargetLoweringARM32.h b/src/IceTargetLoweringARM32.h
index 6085eed48b016b3459e4dd343a5413eeee002077..1907096b530239fb6c4b95731f034e2594254589 100644
--- a/src/IceTargetLoweringARM32.h
+++ b/src/IceTargetLoweringARM32.h
@@ -110,7 +110,8 @@ public:
   Operand *loOperand(Operand *Operand);
   Operand *hiOperand(Operand *Operand);
   void finishArgumentLowering(Variable *Arg, Variable *FramePtr,
-                              size_t BasicFrameOffset, size_t &InArgsSizeBytes);
+                              size_t BasicFrameOffset, size_t StackAdjBytes,

[John, 2015/09/23 15:28:59]

What's the point of the ARM changes? you're passing an extra parameter, but it
seems you're not using it?... maybe revert and backport this later?

[Jim Stichnoth, 2015/09/23 20:17:01]

Good point - for some reason I thought finishArgumentLowering() was virtual and
I needed to change the signature everywhere.  Reverted.

+                              size_t &InArgsSizeBytes);
 
   bool hasCPUFeature(TargetARM32Features::ARM32InstructionSet I) const {
     return CPUFeatures.hasFeature(I);