From 81ce279f2bc2afa1056a47beaf528927e1b9f768 Mon Sep 17 00:00:00 2001 From: Sanjay Patel Date: Sun, 15 Sep 2019 20:13:27 +0000 Subject: [PATCH] [InstCombine] add icmp tests with extra uses; NFC git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@371939 91177308-0d34-0410-b5e6-96231b3b80d8 --- test/Transforms/InstCombine/icmp.ll | 34 +++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) diff --git a/test/Transforms/InstCombine/icmp.ll b/test/Transforms/InstCombine/icmp.ll index 3fecf97e89d..07ec4e7b40f 100644 --- a/test/Transforms/InstCombine/icmp.ll +++ b/test/Transforms/InstCombine/icmp.ll @@ -556,6 +556,23 @@ define i1 @test27(i32 %x, i32 %y, i32 %z) { ret i1 %c } +define i1 @test27_extra_uses(i32 %x, i32 %y, i32 %z) { +; CHECK-LABEL: @test27_extra_uses( +; CHECK-NEXT: [[LHS:%.*]] = sub nsw i32 [[X:%.*]], [[Z:%.*]] +; CHECK-NEXT: call void @foo(i32 [[LHS]]) +; CHECK-NEXT: [[RHS:%.*]] = sub nsw i32 [[Y:%.*]], [[Z]] +; CHECK-NEXT: call void @foo(i32 [[RHS]]) +; CHECK-NEXT: [[C:%.*]] = icmp sgt i32 [[LHS]], [[RHS]] +; CHECK-NEXT: ret i1 [[C]] +; + %lhs = sub nsw i32 %x, %z + call void @foo(i32 %lhs) + %rhs = sub nsw i32 %y, %z + call void @foo(i32 %rhs) + %c = icmp sgt i32 %lhs, %rhs + ret i1 %c +} + ; X - Z > Y - Z -> X > Y if there is no overflow. define i1 @test28(i32 %x, i32 %y, i32 %z) { ; CHECK-LABEL: @test28( @@ -568,6 +585,23 @@ define i1 @test28(i32 %x, i32 %y, i32 %z) { ret i1 %c } +define i1 @test28_extra_uses(i32 %x, i32 %y, i32 %z) { +; CHECK-LABEL: @test28_extra_uses( +; CHECK-NEXT: [[LHS:%.*]] = sub nuw i32 [[X:%.*]], [[Z:%.*]] +; CHECK-NEXT: call void @foo(i32 [[LHS]]) +; CHECK-NEXT: [[RHS:%.*]] = sub nuw i32 [[Y:%.*]], [[Z]] +; CHECK-NEXT: call void @foo(i32 [[RHS]]) +; CHECK-NEXT: [[C:%.*]] = icmp ugt i32 [[LHS]], [[RHS]] +; CHECK-NEXT: ret i1 [[C]] +; + %lhs = sub nuw i32 %x, %z + call void @foo(i32 %lhs) + %rhs = sub nuw i32 %y, %z + call void @foo(i32 %rhs) + %c = icmp ugt i32 %lhs, %rhs + ret i1 %c +} + ; X + Y > X -> Y > 0 if there is no overflow. define i1 @test29(i32 %x, i32 %y) { ; CHECK-LABEL: @test29( -- 2.40.0