xref: /llvm-project/llvm/test/Transforms/GlobalOpt/storepointer-compare-no-null-opt.ll (revision d586bd5ca231a6022f439d4c6e43cfeeb53eb1d6) 
1; RUN: opt < %s -passes=globalopt -S | FileCheck %s
2; CHECK: global
3
4@G = internal global ptr null              ; <ptr> [#uses=2]
5
6define internal void @Actual() {
7; CHECK-LABEL: Actual(
8        ret void
9}
10
11define void @init() {
12; CHECK-LABEL: init(
13; CHECK: store ptr @Actual, ptr @G
14        store ptr @Actual, ptr @G
15        ret void
16}
17
18define void @doit() #0 {
19; CHECK-LABEL: doit(
20        %FP = load ptr, ptr @G         ; <ptr> [#uses=2]
21; CHECK: %FP = load ptr, ptr @G
22        %CC = icmp eq ptr %FP, null                ; <i1> [#uses=1]
23; CHECK: %CC = icmp eq ptr %FP, null
24        br i1 %CC, label %isNull, label %DoCall
25; CHECK: br i1 %CC, label %isNull, label %DoCall
26
27DoCall:         ; preds = %0
28; CHECK: DoCall:
29; CHECK: call void %FP()
30; CHECK: ret void
31        call void %FP( )
32        ret void
33
34isNull:         ; preds = %0
35; CHECK: isNull:
36; CHECK: ret void
37        ret void
38}
39
40attributes #0 = { null_pointer_is_valid }
41