[InstCombine] add icmp (lshr X, C1), C2 test; NFC

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@314696 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/InstCombine/icmp-shr.ll b/test/Transforms/InstCombine/icmp-shr.ll
index af608f3666e6dff56e0c3d18d15fffdc66c1ee6f..eba9151a485929b066988cffb91d8215b1ce65cf 100644 (file)
--- a/test/Transforms/InstCombine/icmp-shr.ll
+++ b/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
+}
+