From: Sanjay Patel <spatel@rotateright.com>
Date: Mon, 16 Sep 2019 12:19:18 +0000 (+0000)
Subject: [InstCombine] add icmp tests with extra uses; NFC
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=8624cc4ae452179b333fd0ecca5b2784edb47ec2;p=llvm

[InstCombine] add icmp tests with extra uses; NFC

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@371979 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/test/Transforms/InstCombine/icmp.ll b/test/Transforms/InstCombine/icmp.ll
index 1e38a7b7f58..02c26ef58b8 100644
--- a/test/Transforms/InstCombine/icmp.ll
+++ b/test/Transforms/InstCombine/icmp.ll
@@ -728,6 +728,23 @@ define i1 @test37(i32 %x, i32 %y, i32 %z) {
   ret i1 %c
 }
 
+define i1 @test37_extra_uses(i32 %x, i32 %y, i32 %z) {
+; CHECK-LABEL: @test37_extra_uses(
+; CHECK-NEXT:    [[LHS:%.*]] = sub nsw i32 [[X:%.*]], [[Y:%.*]]
+; CHECK-NEXT:    call void @foo(i32 [[LHS]])
+; CHECK-NEXT:    [[RHS:%.*]] = sub nsw i32 [[X]], [[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, %y
+  call void @foo(i32 %lhs)
+  %rhs = sub nsw i32 %x, %z
+  call void @foo(i32 %rhs)
+  %c = icmp sgt i32 %lhs, %rhs
+  ret i1 %c
+}
+
 ; X - Y > X - Z -> Z > Y if there is no overflow.
 define i1 @test38(i32 %x, i32 %y, i32 %z) {
 ; CHECK-LABEL: @test38(
@@ -740,6 +757,23 @@ define i1 @test38(i32 %x, i32 %y, i32 %z) {
   ret i1 %c
 }
 
+define i1 @test38_extra_uses(i32 %x, i32 %y, i32 %z) {
+; CHECK-LABEL: @test38_extra_uses(
+; CHECK-NEXT:    [[LHS:%.*]] = sub nuw i32 [[X:%.*]], [[Y:%.*]]
+; CHECK-NEXT:    call void @foo(i32 [[LHS]])
+; CHECK-NEXT:    [[RHS:%.*]] = sub nuw i32 [[X]], [[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, %y
+  call void @foo(i32 %lhs)
+  %rhs = sub nuw i32 %x, %z
+  call void @foo(i32 %rhs)
+  %c = icmp ugt i32 %lhs, %rhs
+  ret i1 %c
+}
+
 ; PR9343 #1
 define i1 @test39(i32 %X, i32 %Y) {
 ; CHECK-LABEL: @test39(