1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2 ; RUN: opt < %s -instcombine -S | FileCheck %s
4 ; InstCombine should mark null-checked argument as nonnull at callsite
5 declare void @dummy(i32*, i32)
7 define void @test(i32* %a, i32 %b) {
10 ; CHECK-NEXT: [[COND1:%.*]] = icmp eq i32* [[A:%.*]], null
11 ; CHECK-NEXT: br i1 [[COND1]], label [[DEAD:%.*]], label [[NOT_NULL:%.*]]
13 ; CHECK-NEXT: [[COND2:%.*]] = icmp eq i32 [[B:%.*]], 0
14 ; CHECK-NEXT: br i1 [[COND2]], label [[DEAD]], label [[NOT_ZERO:%.*]]
16 ; CHECK-NEXT: call void @dummy(i32* nonnull [[A]], i32 [[B]])
17 ; CHECK-NEXT: ret void
19 ; CHECK-NEXT: unreachable
22 %cond1 = icmp eq i32* %a, null
23 br i1 %cond1, label %dead, label %not_null
25 %cond2 = icmp eq i32 %b, 0
26 br i1 %cond2, label %dead, label %not_zero
28 call void @dummy(i32* %a, i32 %b)
34 ; The nonnull attribute in the 'bar' declaration is
35 ; propagated to the parameters of the 'baz' callsite.
37 declare void @bar(i8*, i8* nonnull noundef)
38 declare void @bar_without_noundef(i8*, i8* nonnull)
39 declare void @baz(i8*, i8*)
41 define void @deduce_nonnull_from_another_call(i8* %a, i8* %b) {
42 ; CHECK-LABEL: @deduce_nonnull_from_another_call(
43 ; CHECK-NEXT: call void @bar(i8* [[A:%.*]], i8* [[B:%.*]])
44 ; CHECK-NEXT: call void @baz(i8* nonnull [[B]], i8* nonnull [[B]])
45 ; CHECK-NEXT: ret void
47 call void @bar(i8* %a, i8* %b)
48 call void @baz(i8* %b, i8* %b)
53 define void @deduce_nonnull_from_another_call2(i8* %a, i8* %b) {
54 ; CHECK-LABEL: @deduce_nonnull_from_another_call2(
55 ; CHECK-NEXT: call void @bar_without_noundef(i8* [[A:%.*]], i8* [[B:%.*]])
56 ; CHECK-NEXT: call void @baz(i8* [[B]], i8* [[B]])
57 ; CHECK-NEXT: ret void
59 call void @bar_without_noundef(i8* %a, i8* %b)
60 call void @baz(i8* %b, i8* %b)