xref: /llvm-project/llvm/test/Transforms/Inline/instsimplify-null-pointer-is-valid.ll (revision ff4fcbb5f4bc96cf848ac7de49ddb562eb1a27f5)
1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2
2; RUN: opt -passes=inline < %s -S | FileCheck %s
3
4; Test that instsimplify invoked by the inliner respects null_pointer_is_valid
5; (by ensuring that the instruction is inserted into the function when invoking
6; instsimplify).
7
8define internal i1 @f(ptr %p) null_pointer_is_valid {
9  %g = getelementptr inbounds i8, ptr %p, i32 -1
10  %r = icmp eq ptr %g, null
11  ret i1 %r
12}
13
14define i1 @g(ptr %p) null_pointer_is_valid {
15; CHECK-LABEL: define i1 @g
16; CHECK-SAME: (ptr [[P:%.*]]) #[[ATTR0:[0-9]+]] {
17; CHECK-NEXT:    [[G_I:%.*]] = getelementptr inbounds i8, ptr [[P]], i32 -1
18; CHECK-NEXT:    [[R_I:%.*]] = icmp eq ptr [[G_I]], null
19; CHECK-NEXT:    ret i1 [[R_I]]
20;
21  %r = call i1 @f(ptr %p)
22  ret i1 %r
23}
24
25define internal i1 @f2(ptr %p) {
26  %g = getelementptr inbounds i8, ptr %p, i32 -1
27  %r = icmp eq ptr %g, null
28  ret i1 %r
29}
30
31define i1 @g2(ptr %p) null_pointer_is_valid {
32; CHECK-LABEL: define i1 @g2
33; CHECK-SAME: (ptr [[P:%.*]]) #[[ATTR0]] {
34; CHECK-NEXT:    [[G_I:%.*]] = getelementptr inbounds i8, ptr [[P]], i32 -1
35; CHECK-NEXT:    [[R_I:%.*]] = icmp eq ptr [[G_I]], null
36; CHECK-NEXT:    ret i1 [[R_I]]
37;
38  %r = call i1 @f2(ptr %p)
39  ret i1 %r
40}
41
42