xref: /llvm-project/llvm/test/Transforms/JumpThreading/nonnull-gep-out-of-bounds.ll (revision 07e34d2de565a88da2724d52cdcf47b4bca873db)
1; RUN: opt -passes=jump-threading -S %s -o - | FileCheck %s
2
3define i32 @f(ptr %a, i64 %i) {
4entry:
5  store i64 0, ptr %a, align 8
6  %p = getelementptr i64, ptr %a, i64 %i
7  %c = icmp eq ptr %p, null
8  ; `%a` is non-null at the end of the block, because we store through it.
9  ; However, `%p` is derived from `%a` via a GEP that is not `inbounds`, therefore we cannot judge `%p` is non-null as well
10  ; and must retain the `icmp` instruction.
11  ; CHECK: %c = icmp eq ptr %p, null
12  br i1 %c, label %if.else, label %if.then
13if.then:
14  ret i32 0
15
16if.else:
17  ret i32 1
18}
19