[PATCH] D153435: [test] Add test for null_pointer_is_valid and Inliner instsimplify interaction

[Arthur Eubanks via Phabricator via llvm-commits]

aeubanks created this revision.
aeubanks added a reviewer: arsenm.
Herald added a project: All.
aeubanks requested review of this revision.
Herald added subscribers: llvm-commits, wdng.
Herald added a project: LLVM.

As requested in D151254 <https://reviews.llvm.org/D151254>


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D153435

Files:
  llvm/test/Transforms/Inline/instsimplify-null-pointer-is-valid.ll


Index: llvm/test/Transforms/Inline/instsimplify-null-pointer-is-valid.ll
===================================================================
--- /dev/null
+++ llvm/test/Transforms/Inline/instsimplify-null-pointer-is-valid.ll
@@ -0,0 +1,19 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2
+; RUN: opt -passes=inline < %s -S | FileCheck %s
+
+define internal i1 @f(ptr %p) null_pointer_is_valid {
+  %g = getelementptr inbounds i8, ptr %p, i32 -1
+  %r = icmp eq ptr %g, null
+  ret i1 %r
+}
+
+define i1 @g(ptr %p) null_pointer_is_valid {
+; CHECK-LABEL: define i1 @g
+; CHECK-SAME: (ptr [[P:%.*]]) #[[ATTR0:[0-9]+]] {
+; CHECK-NEXT:    [[G_I:%.*]] = getelementptr inbounds i8, ptr [[P]], i32 -1
+; CHECK-NEXT:    [[R_I:%.*]] = icmp eq ptr [[G_I]], null
+; CHECK-NEXT:    ret i1 [[R_I]]
+;
+  %r = call i1 @f(ptr %p)
+  ret i1 %r
+}


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