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add testcases for the foo_with_overflow op xforms added recently and
fix bugs exposed by the tests. Testcases from Alastair Lynn! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90056 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -9934,9 +9934,9 @@ Instruction *InstCombiner::visitCallInst(CallInst &CI) {
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// Create a simple add instruction, and insert it into the struct.
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Instruction *Add = BinaryOperator::CreateAdd(LHS, RHS, "", &CI);
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Worklist.Add(Add);
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Constant *V[2];
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V[0] = UndefValue::get(LHS->getType());
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V[1] = ConstantInt::getTrue(*Context);
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Constant *V[] = {
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UndefValue::get(LHS->getType()), ConstantInt::getTrue(*Context)
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};
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Constant *Struct = ConstantStruct::get(*Context, V, 2, false);
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return InsertValueInst::Create(Struct, Add, 0);
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}
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@ -9946,9 +9946,9 @@ Instruction *InstCombiner::visitCallInst(CallInst &CI) {
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// Create a simple add instruction, and insert it into the struct.
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Instruction *Add = BinaryOperator::CreateNUWAdd(LHS, RHS, "", &CI);
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Worklist.Add(Add);
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Constant *V[2];
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V[0] = UndefValue::get(LHS->getType());
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V[1] = ConstantInt::getFalse(*Context);
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Constant *V[] = {
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UndefValue::get(LHS->getType()), ConstantInt::getFalse(*Context)
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};
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Constant *Struct = ConstantStruct::get(*Context, V, 2, false);
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return InsertValueInst::Create(Struct, Add, 0);
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}
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@ -9973,7 +9973,8 @@ Instruction *InstCombiner::visitCallInst(CallInst &CI) {
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// X + 0 -> {X, false}
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if (RHS->isZero()) {
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Constant *V[] = {
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UndefValue::get(II->getType()), ConstantInt::getFalse(*Context)
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UndefValue::get(II->getOperand(0)->getType()),
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ConstantInt::getFalse(*Context)
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};
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Constant *Struct = ConstantStruct::get(*Context, V, 2, false);
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return InsertValueInst::Create(Struct, II->getOperand(1), 0);
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@ -9992,7 +9993,8 @@ Instruction *InstCombiner::visitCallInst(CallInst &CI) {
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// X - 0 -> {X, false}
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if (RHS->isZero()) {
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Constant *V[] = {
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UndefValue::get(II->getType()), ConstantInt::getFalse(*Context)
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UndefValue::get(II->getOperand(1)->getType()),
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ConstantInt::getFalse(*Context)
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};
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Constant *Struct = ConstantStruct::get(*Context, V, 2, false);
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return InsertValueInst::Create(Struct, II->getOperand(1), 0);
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@ -10021,11 +10023,12 @@ Instruction *InstCombiner::visitCallInst(CallInst &CI) {
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// X * 1 -> {X, false}
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if (RHSI->equalsInt(1)) {
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Constant *V[2];
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V[0] = UndefValue::get(II->getType());
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V[1] = ConstantInt::getFalse(*Context);
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Constant *V[] = {
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UndefValue::get(II->getOperand(1)->getType()),
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ConstantInt::getFalse(*Context)
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};
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Constant *Struct = ConstantStruct::get(*Context, V, 2, false);
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return InsertValueInst::Create(Struct, II->getOperand(1), 1);
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return InsertValueInst::Create(Struct, II->getOperand(1), 0);
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}
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}
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break;
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@ -1,12 +1,79 @@
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; RUN: opt %s -instcombine -S | FileCheck %s
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declare {i8, i1} @llvm.uadd.with.overflow.i8(i8, i8)
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%overflow.result = type {i8, i1}
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declare %overflow.result @llvm.uadd.with.overflow.i8(i8, i8)
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declare %overflow.result @llvm.umul.with.overflow.i8(i8, i8)
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define i8 @test1(i8 %A, i8 %B) {
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%x = call {i8, i1} @llvm.uadd.with.overflow.i8(i8 %A, i8 %B)
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%y = extractvalue {i8, i1} %x, 0
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%x = call %overflow.result @llvm.uadd.with.overflow.i8(i8 %A, i8 %B)
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%y = extractvalue %overflow.result %x, 0
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ret i8 %y
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; CHECK: @test1
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; CHECK-NEXT: %y = add i8 %A, %B
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; CHECK-NEXT: ret i8 %y
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}
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define i8 @test2(i8 %A, i8 %B, i1* %overflowPtr) {
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%and.A = and i8 %A, 127
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%and.B = and i8 %B, 127
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%x = call %overflow.result @llvm.uadd.with.overflow.i8(i8 %and.A, i8 %and.B)
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%y = extractvalue %overflow.result %x, 0
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%z = extractvalue %overflow.result %x, 1
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store i1 %z, i1* %overflowPtr
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ret i8 %y
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; CHECK: @test2
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; CHECK-NEXT: %and.A = and i8 %A, 127
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; CHECK-NEXT: %and.B = and i8 %B, 127
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; CHECK-NEXT: %1 = add nuw i8 %and.A, %and.B
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; CHECK-NEXT: store i1 false, i1* %overflowPtr
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; CHECK-NEXT: ret i8 %1
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}
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define i8 @test3(i8 %A, i8 %B, i1* %overflowPtr) {
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%or.A = or i8 %A, -128
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%or.B = or i8 %B, -128
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%x = call %overflow.result @llvm.uadd.with.overflow.i8(i8 %or.A, i8 %or.B)
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%y = extractvalue %overflow.result %x, 0
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%z = extractvalue %overflow.result %x, 1
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store i1 %z, i1* %overflowPtr
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ret i8 %y
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; CHECK: @test3
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; CHECK-NEXT: %or.A = or i8 %A, -128
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; CHECK-NEXT: %or.B = or i8 %B, -128
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; CHECK-NEXT: %1 = add i8 %or.A, %or.B
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; CHECK-NEXT: store i1 true, i1* %overflowPtr
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; CHECK-NEXT: ret i8 %1
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}
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define i8 @test4(i8 %A, i1* %overflowPtr) {
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%x = call %overflow.result @llvm.uadd.with.overflow.i8(i8 undef, i8 %A)
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%y = extractvalue %overflow.result %x, 0
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%z = extractvalue %overflow.result %x, 1
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store i1 %z, i1* %overflowPtr
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ret i8 %y
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; CHECK: @test4
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; CHECK-NEXT: ret i8 undef
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}
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define i8 @test5(i8 %A, i1* %overflowPtr) {
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%x = call %overflow.result @llvm.umul.with.overflow.i8(i8 0, i8 %A)
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%y = extractvalue %overflow.result %x, 0
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%z = extractvalue %overflow.result %x, 1
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store i1 %z, i1* %overflowPtr
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ret i8 %y
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; CHECK: @test5
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; CHECK-NEXT: store i1 false, i1* %overflowPtr
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; CHECK-NEXT: ret i8 0
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}
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define i8 @test6(i8 %A, i1* %overflowPtr) {
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%x = call %overflow.result @llvm.umul.with.overflow.i8(i8 1, i8 %A)
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%y = extractvalue %overflow.result %x, 0
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%z = extractvalue %overflow.result %x, 1
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store i1 %z, i1* %overflowPtr
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ret i8 %y
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; CHECK: @test6
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; CHECK-NEXT: store i1 false, i1* %overflowPtr
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; CHECK-NEXT: ret i8 %A
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}
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