aboutsummaryrefslogtreecommitdiffstats
path: root/test/Transforms/SimplifyCFG/select-gep.ll
blob: 96c214cbc81ea807fc9077bb4b44ec590262c269 (plain)
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-LABEL: @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-LABEL: @test2(
; CHECK: %incdec.ptr.y = select i1 %cmp, i8* %incdec.ptr, i8* %y
; CHECK: ret i8* %incdec.ptr.y
}