[llvm] r333756 - [InstCombine] add baseline test for bug with div+select transform (D47576)

[Sanjay Patel via llvm-commits]

Author: spatel
Date: Fri Jun  1 07:39:05 2018
New Revision: 333756

URL: http://llvm.org/viewvc/llvm-project?rev=333756&view=rev
Log:
[InstCombine] add baseline test for bug with div+select transform (D47576)

Added:
    llvm/trunk/test/Transforms/InstCombine/sdiv-guard.ll

Added: llvm/trunk/test/Transforms/InstCombine/sdiv-guard.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Transforms/InstCombine/sdiv-guard.ll?rev=333756&view=auto
==============================================================================
--- llvm/trunk/test/Transforms/InstCombine/sdiv-guard.ll (added)
+++ llvm/trunk/test/Transforms/InstCombine/sdiv-guard.ll Fri Jun  1 07:39:05 2018
@@ -0,0 +1,21 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt < %s -instcombine -S | FileCheck %s
+
+declare void @llvm.experimental.guard(i1, ...)
+
+; FIXME: If %flag is false then %s == 0 and guard should be triggered.
+
+define i32 @a(i1 %flag, i32 %X) nounwind readnone {
+; CHECK-LABEL: @a(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp ne i32 [[X:%.*]], 0
+; CHECK-NEXT:    call void (i1, ...) @llvm.experimental.guard(i1 [[CMP]]) #1 [ "deopt"() ]
+; CHECK-NEXT:    [[R:%.*]] = sdiv i32 100, [[X]]
+; CHECK-NEXT:    ret i32 [[R]]
+;
+  %s = select i1 %flag, i32 %X, i32 0
+  %cmp = icmp ne i32 %s, 0
+  call void(i1, ...) @llvm.experimental.guard( i1 %cmp )[ "deopt"() ]
+  %r = sdiv i32 100, %s
+  ret i32 %r
+}
+