[llvm] r314696 - [InstCombine] add icmp (lshr X, C1), C2 test; NFC

[Sanjay Patel via llvm-commits]

Author: spatel
Date: Mon Oct  2 11:16:17 2017
New Revision: 314696

URL: http://llvm.org/viewvc/llvm-project?rev=314696&view=rev
Log:
[InstCombine] add icmp (lshr X, C1), C2 test; NFC

Modified:
    llvm/trunk/test/Transforms/InstCombine/icmp-shr.ll

Modified: llvm/trunk/test/Transforms/InstCombine/icmp-shr.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Transforms/InstCombine/icmp-shr.ll?rev=314696&r1=314695&r2=314696&view=diff
==============================================================================
--- llvm/trunk/test/Transforms/InstCombine/icmp-shr.ll (original)
+++ llvm/trunk/test/Transforms/InstCombine/icmp-shr.ll Mon Oct  2 11:16:17 2017
@@ -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
+}
+