1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
|
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2
; RUN: opt -passes='function(dse),cgscc(inline),function(sroa,gvn,sccp)' -S %s | FileCheck %s
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture)
declare void @llvm.assume(i1 noundef)
declare i1 @cond() #0
define internal i1 @check_cond(ptr %a) #0 {
%l = load i32, ptr %a
%c = icmp eq i32 %l, 1
br i1 %c, label %then, label %else
then:
%res = call i1 @cond()
ret i1 %res
else:
ret i1 0
}
define i32 @test() {
; CHECK-LABEL: define i32 @test() {
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[THEN_I:%.*]]
; CHECK: then.i:
; CHECK-NEXT: [[RES_I:%.*]] = call i1 @cond()
; CHECK-NEXT: br label [[CHECK_COND_EXIT:%.*]]
; CHECK: check_cond.exit:
; CHECK-NEXT: call void @llvm.assume(i1 [[RES_I]])
; CHECK-NEXT: ret i32 0
;
entry:
%a = alloca i32, align 4
call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %a)
store i32 1, ptr %a, align 4
%res = call i1 @check_cond(ptr %a)
call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %a)
call void @llvm.assume(i1 %res)
ret i32 0
}
attributes #0 = { nounwind readonly willreturn }
|
