[InstCombine] add icmp tests with extra uses; NFC

llvm-svn: 371939

diff --git a/llvm/test/Transforms/InstCombine/icmp.ll b/llvm/test/Transforms/InstCombine/icmp.ll
index 3fecf97..07ec4e7 100644 (file)
--- a/llvm/test/Transforms/InstCombine/icmp.ll
+++ b/llvm/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(