[llvm] 6381d48 - [tests] Add test coverage for issue causing revert f7988d0

[Philip Reames via llvm-commits]

Author: Philip Reames
Date: 2022-05-18T08:17:57-07:00
New Revision: 6381d4845b06a6d45d5fc237b360fac2979f1193

URL: https://github.com/llvm/llvm-project/commit/6381d4845b06a6d45d5fc237b360fac2979f1193
DIFF: https://github.com/llvm/llvm-project/commit/6381d4845b06a6d45d5fc237b360fac2979f1193.diff

LOG: [tests] Add test coverage for issue causing revert f7988d0

As theorized, it does look like opnew is not getting inferred inaccessiblemmemonly.

Added: 
    llvm/test/Transforms/GVN/nonescaping.ll

Modified: 
    

Removed: 
    


################################################################################
diff  --git a/llvm/test/Transforms/GVN/nonescaping.ll b/llvm/test/Transforms/GVN/nonescaping.ll
new file mode 100644
index 0000000000000..61ec38b5bfe38
--- /dev/null
+++ b/llvm/test/Transforms/GVN/nonescaping.ll
@@ -0,0 +1,54 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt < %s -S -basic-aa -gvn 2>&1 | FileCheck %s
+
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128"
+target triple = "x86_64-apple-darwin10.0"
+
+declare noalias i8* @malloc(i64) nounwind
+declare noalias i8* @calloc(i64, i64)
+declare noalias i8* @_Znwm(i64)
+declare void @escape(i8*)
+
+define i8 @test_malloc(i8* %p) {
+; CHECK-LABEL: @test_malloc(
+; CHECK-NEXT:    [[OBJ:%.*]] = call i8* @malloc(i64 16)
+; CHECK-NEXT:    call void @escape(i8* [[OBJ]])
+; CHECK-NEXT:    ret i8 0
+;
+  %v1 = load i8, i8* %p
+  %obj = call i8* @malloc(i64 16)
+  %v2 = load i8, i8* %p
+  %sub = sub i8 %v1, %v2
+  call void @escape(i8* %obj)
+  ret i8 %sub
+}
+
+define i8 @test_calloc(i8* %p) {
+; CHECK-LABEL: @test_calloc(
+; CHECK-NEXT:    [[OBJ:%.*]] = call i8* @calloc(i64 1, i64 16)
+; CHECK-NEXT:    call void @escape(i8* [[OBJ]])
+; CHECK-NEXT:    ret i8 0
+;
+  %v1 = load i8, i8* %p
+  %obj = call i8* @calloc(i64 1, i64 16)
+  %v2 = load i8, i8* %p
+  %sub = sub i8 %v1, %v2
+  call void @escape(i8* %obj)
+  ret i8 %sub
+}
+
+define i8 @test_opnew(i8* %p) {
+; CHECK-LABEL: @test_opnew(
+; CHECK-NEXT:    [[OBJ:%.*]] = call i8* @_Znwm(i64 16)
+; CHECK-NEXT:    call void @escape(i8* [[OBJ]])
+; CHECK-NEXT:    ret i8 0
+;
+  %v1 = load i8, i8* %p
+  %obj = call i8* @_Znwm(i64 16)
+  %v2 = load i8, i8* %p
+  %sub = sub i8 %v1, %v2
+  call void @escape(i8* %obj)
+  ret i8 %sub
+}
+
+