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
|
; RUN: opt < %s -instcombine -mem2reg -S | grep {%A = alloca}
; RUN: opt < %s -instcombine -mem2reg -S | \
; RUN: not grep {%B = alloca}
; END.
; Ensure that instcombine doesn't sink the loads in entry/cond_true into
; cond_next. Doing so prevents mem2reg from promoting the B alloca.
define i32 @test2(i32 %C) {
entry:
%A = alloca i32
%B = alloca i32
%tmp = call i32 (...)* @bar( i32* %A ) ; <i32> [#uses=0]
%T = load i32* %A ; <i32> [#uses=1]
%tmp2 = icmp eq i32 %C, 0 ; <i1> [#uses=1]
br i1 %tmp2, label %cond_next, label %cond_true
cond_true: ; preds = %entry
store i32 123, i32* %B
call i32 @test2( i32 123 ) ; <i32>:0 [#uses=0]
%T1 = load i32* %B ; <i32> [#uses=1]
br label %cond_next
cond_next: ; preds = %cond_true, %entry
%tmp1.0 = phi i32 [ %T1, %cond_true ], [ %T, %entry ] ; <i32> [#uses=1]
%tmp7 = call i32 (...)* @baq( ) ; <i32> [#uses=0]
%tmp8 = call i32 (...)* @baq( ) ; <i32> [#uses=0]
%tmp9 = call i32 (...)* @baq( ) ; <i32> [#uses=0]
%tmp10 = call i32 (...)* @baq( ) ; <i32> [#uses=0]
%tmp11 = call i32 (...)* @baq( ) ; <i32> [#uses=0]
%tmp12 = call i32 (...)* @baq( ) ; <i32> [#uses=0]
%tmp13 = call i32 (...)* @baq( ) ; <i32> [#uses=0]
%tmp14 = call i32 (...)* @baq( ) ; <i32> [#uses=0]
%tmp15 = call i32 (...)* @baq( ) ; <i32> [#uses=0]
%tmp16 = call i32 (...)* @baq( ) ; <i32> [#uses=0]
%tmp17 = call i32 (...)* @baq( ) ; <i32> [#uses=0]
%tmp18 = call i32 (...)* @baq( ) ; <i32> [#uses=0]
%tmp19 = call i32 (...)* @baq( ) ; <i32> [#uses=0]
%tmp20 = call i32 (...)* @baq( ) ; <i32> [#uses=0]
ret i32 %tmp1.0
}
declare i32 @bar(...)
declare i32 @baq(...)
|
