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Teach GetUnderlyingObject / BasicAA about addrspacecast
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@213025 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -309,7 +309,8 @@ DecomposeGEPExpression(const Value *V, int64_t &BaseOffs,
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return V;
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}
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if (Op->getOpcode() == Instruction::BitCast) {
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if (Op->getOpcode() == Instruction::BitCast ||
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Op->getOpcode() == Instruction::AddrSpaceCast) {
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V = Op->getOperand(0);
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continue;
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}
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@ -1901,7 +1901,8 @@ llvm::GetUnderlyingObject(Value *V, const DataLayout *TD, unsigned MaxLookup) {
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for (unsigned Count = 0; MaxLookup == 0 || Count < MaxLookup; ++Count) {
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if (GEPOperator *GEP = dyn_cast<GEPOperator>(V)) {
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V = GEP->getPointerOperand();
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} else if (Operator::getOpcode(V) == Instruction::BitCast) {
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} else if (Operator::getOpcode(V) == Instruction::BitCast ||
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Operator::getOpcode(V) == Instruction::AddrSpaceCast) {
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V = cast<Operator>(V)->getOperand(0);
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} else if (GlobalAlias *GA = dyn_cast<GlobalAlias>(V)) {
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if (GA->mayBeOverridden())
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@ -45,9 +45,9 @@ define void @test4(i8* %P) {
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store i8 19, i8* %P ;; dead
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%A = getelementptr i8* %P, i32 3
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store i8 42, i8* %A ;; dead
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%Q = bitcast i8* %P to double*
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store double 0.0, double* %Q
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ret void
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@ -61,7 +61,7 @@ define void @test5(i32 %i) nounwind ssp {
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%C = getelementptr i8* %B, i32 %i
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store i8 10, i8* %C ;; Dead store to variable index.
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store i32 20, i32* %A
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call void @test5a(i32* %A)
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ret void
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; CHECK-LABEL: @test5(
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@ -69,3 +69,19 @@ define void @test5(i32 %i) nounwind ssp {
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; CHECK-NEXT: store i32 20
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; CHECK-NEXT: call void @test5a
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}
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declare void @test5a_as1(i32*)
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define void @test5_addrspacecast(i32 %i) nounwind ssp {
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%A = alloca i32
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%B = addrspacecast i32* %A to i8 addrspace(1)*
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%C = getelementptr i8 addrspace(1)* %B, i32 %i
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store i8 10, i8 addrspace(1)* %C ;; Dead store to variable index.
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store i32 20, i32* %A
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call void @test5a(i32* %A)
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ret void
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; CHECK-LABEL: @test5_addrspacecast(
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; CHECK-NEXT: alloca
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; CHECK-NEXT: store i32 20
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; CHECK-NEXT: call void @test5a
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}
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@ -172,6 +172,23 @@ define i32* @test13() {
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; CHECK-NEXT: call void
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}
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define i32 addrspace(1)* @test13_addrspacecast() {
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%p = tail call i8* @malloc(i32 4)
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%p.bc = bitcast i8* %p to i32*
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%P = addrspacecast i32* %p.bc to i32 addrspace(1)*
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%DEAD = load i32 addrspace(1)* %P
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%DEAD2 = add i32 %DEAD, 1
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store i32 %DEAD2, i32 addrspace(1)* %P
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call void @test13f( )
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store i32 0, i32 addrspace(1)* %P
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ret i32 addrspace(1)* %P
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; CHECK: @test13_addrspacecast()
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; CHECK-NEXT: malloc
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; CHECK-NEXT: bitcast
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; CHECK-NEXT: addrspacecast
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; CHECK-NEXT: call void
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}
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declare noalias i8* @malloc(i32)
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declare noalias i8* @calloc(i32, i32)
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