Commit d31f4c61 authored by Finkel, Hal's avatar Finkel, Hal
Browse files

Merging r215793: 

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r215793 | hfinkel | 2014-08-16 00:16:29 +0000 (Sat, 16 Aug 2014) | 9 lines

[PowerPC] Darwin byval arguments are not immutable

On PPC/Darwin, byval arguments occur at fixed stack offsets in the callee's
frame, but are not immutable -- the pointer value is directly available to the
higher-level code as the address of the argument, and the value of the byval
argument can be modified at the IR level.

This is necessary, but not sufficient, to fix PR20280. When PR20280 is fixed in
a follow-up commit, its test case will cover this change.
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llvm-svn: 223735
parent ea9e182a

llvm/lib/Target/PowerPC/PPCISelLowering.cpp

+1 −1
Original line number Diff line number Diff line
@@ -3056,7 +3056,7 @@ PPCTargetLowering::LowerFormalArguments_Darwin( 
        CurArgOffset = CurArgOffset + (4 - ObjSize);

      }

      // The value of the object is its address.

      int FI = MFI->CreateFixedObject(ObjSize, CurArgOffset, true);

      int FI = MFI->CreateFixedObject(ObjSize, CurArgOffset, false);

      SDValue FIN = DAG.getFrameIndex(FI, PtrVT);

      InVals.push_back(FIN);

      if (ObjSize==1 || ObjSize==2) {