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Don't look for leaf values to store when lowering stores of
empty structs. This fixes PR2612. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54226 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -2928,9 +2928,7 @@ void SelectionDAGLowering::visitLoad(LoadInst &I) {
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void SelectionDAGLowering::visitStore(StoreInst &I) {
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Value *SrcV = I.getOperand(0);
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SDValue Src = getValue(SrcV);
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Value *PtrV = I.getOperand(1);
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SDValue Ptr = getValue(PtrV);
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SmallVector<MVT, 4> ValueVTs;
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SmallVector<uint64_t, 4> Offsets;
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@ -2939,6 +2937,12 @@ void SelectionDAGLowering::visitStore(StoreInst &I) {
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if (NumValues == 0)
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return;
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// Get the lowered operands. Note that we do this after
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// checking if NumResults is zero, because with zero results
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// the operands won't have values in the map.
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SDValue Src = getValue(SrcV);
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SDValue Ptr = getValue(PtrV);
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SDValue Root = getRoot();
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SmallVector<SDValue, 4> Chains(NumValues);
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MVT PtrVT = Ptr.getValueType();
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18
test/CodeGen/Generic/empty-load-store.ll
Normal file
18
test/CodeGen/Generic/empty-load-store.ll
Normal file
@ -0,0 +1,18 @@
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; RUN: llvm-as < %s | llc
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; PR2612
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@current_foo = internal global { } zeroinitializer
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define i32 @foo() {
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entry:
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%retval = alloca i32
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store i32 0, i32* %retval
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%local_foo = alloca { }
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load { }* @current_foo
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store { } %0, { }* %local_foo
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br label %return
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return:
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load i32* %retval
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ret i32 %1
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}
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