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Strip the pointer casts off of allocas so that the selection DAG can find them. 

PR10799

llvm-svn: 155954
This commit is contained in:
Bill Wendling 2012-05-01 22:50:45 +00:00
parent 169ec35bb3
commit b6b50c6638
2 changed files with 18 additions and 1 deletions
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2
llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
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@ -5050,7 +5050,7 @@ SelectionDAGBuilder::visitIntrinsicCall(const CallInst &I, unsigned Intrinsic) {
} }
case Intrinsic::gcroot: case Intrinsic::gcroot:
if (GFI) { if (GFI) {
const Value *Alloca = I.getArgOperand(0); const Value *Alloca = I.getArgOperand(0)->stripPointerCasts();
const Constant *TypeMap = cast<Constant>(I.getArgOperand(1)); const Constant *TypeMap = cast<Constant>(I.getArgOperand(1));
FrameIndexSDNode *FI = cast<FrameIndexSDNode>(getValue(Alloca).getNode()); FrameIndexSDNode *FI = cast<FrameIndexSDNode>(getValue(Alloca).getNode());

17
llvm/test/CodeGen/X86/GC/cg-O0.ll Normal file
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@ -0,0 +1,17 @@
; RUN: llc < %s -O0
define i32 @main() {
entry:
call void @f()
ret i32 0
}
define void @f() gc "ocaml" {
entry:
%ptr.stackref = alloca i8*
%gcroot = bitcast i8** %ptr.stackref to i8**
call void @llvm.gcroot(i8** %gcroot, i8* null)
ret void
}
declare void @llvm.gcroot(i8**, i8*) nounwind