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
|
; RUN: opt -S -simplifycfg %s | FileCheck %s
define i8* @test1(i8* %x, i64 %y) nounwind {
entry:
%tmp1 = load i8* %x, align 1
%cmp = icmp eq i8 %tmp1, 47
br i1 %cmp, label %if.then, label %if.end
if.then:
%incdec.ptr = getelementptr inbounds i8* %x, i64 %y
br label %if.end
if.end:
%x.addr = phi i8* [ %incdec.ptr, %if.then ], [ %x, %entry ]
ret i8* %x.addr
; CHECK: @test1
; CHECK-NOT: select
; CHECK: ret i8* %x.addr
}
%ST = type { i8, i8 }
define i8* @test2(%ST* %x, i8* %y) nounwind {
entry:
%cmp = icmp eq %ST* %x, null
br i1 %cmp, label %if.then, label %if.end
if.then:
%incdec.ptr = getelementptr %ST* %x, i32 0, i32 1
br label %if.end
if.end:
%x.addr = phi i8* [ %incdec.ptr, %if.then ], [ %y, %entry ]
ret i8* %x.addr
; CHECK: @test2
; CHECK: %x.addr = select i1 %cmp, i8* %incdec.ptr, i8* %y
; CHECK: ret i8* %x.addr
}
|
