Fix stack size processing now that the return address isn't an implied

push onto the top of the stack like x86, which uses the local area
offset.  This will allow the removal of PowerPCPEI.cpp soon.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15573 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/PowerPC/PowerPCRegisterInfo.cpp b/lib/Target/PowerPC/PowerPCRegisterInfo.cpp
index 42f2d3e9e8337ef432803b9d0b3faa43eafd49f3..7607a0582458d241616199970ee1b989cc52107e 100644 (file)
--- a/lib/Target/PowerPC/PowerPCRegisterInfo.cpp
+++ b/lib/Target/PowerPC/PowerPCRegisterInfo.cpp
@@ -210,9 +210,11 @@ void PowerPCRegisterInfo::emitPrologue(MachineFunction &MF) const {
   // Do we need to allocate space on the stack?
   if (NumBytes == 0) return;
 
-  // Round the size to a multiple of the alignment
+  // Add the size of R1 to  NumBytes size for the store of R1 to the bottom 
+  // of the stack and round the size to a multiple of the alignment.
   unsigned Align = MF.getTarget().getFrameInfo()->getStackAlignment();
-  NumBytes = (NumBytes+Align-1)/Align*Align;
+  unsigned Size = getRegClass(PPC32::R1)->getSize();
+  NumBytes = (NumBytes+Size+Align-1)/Align*Align;
 
   // Update frame info to pretend that this is part of the stack...
   MFI->setStackSize(NumBytes);