From ce86ab3ed7fea8d75a9397e8338da6a4fee89ae9 Mon Sep 17 00:00:00 2001
From: Sanjay Patel <spatel@rotateright.com>
Date: Mon, 2 Oct 2017 18:16:17 +0000
Subject: [PATCH] [InstCombine] add icmp (lshr X, C1), C2 test; NFC

llvm-svn: 314696
---
 llvm/test/Transforms/InstCombine/icmp-shr.ll | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/llvm/test/Transforms/InstCombine/icmp-shr.ll b/llvm/test/Transforms/InstCombine/icmp-shr.ll
index af608f3666e6..eba9151a4859 100644
--- a/llvm/test/Transforms/InstCombine/icmp-shr.ll
+++ b/llvm/test/Transforms/InstCombine/icmp-shr.ll
@@ -478,3 +478,18 @@ define i1 @PR24873(i64 %V) {
   ret i1 %icmp
 }
 
+declare void @foo(i32)
+
+define i1 @exact_multiuse(i32 %x) {
+; CHECK-LABEL: @exact_multiuse(
+; CHECK-NEXT:    [[SH:%.*]] = lshr exact i32 %x, 7
+; CHECK-NEXT:    [[CMP:%.*]] = icmp eq i32 [[SH]], 1024
+; CHECK-NEXT:    call void @foo(i32 [[SH]])
+; CHECK-NEXT:    ret i1 [[CMP]]
+;
+  %sh = lshr exact i32 %x, 7
+  %cmp = icmp eq i32 %sh, 1024
+  call void @foo(i32 %sh)
+  ret i1 %cmp
+}
+