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
|
; RUN: opt -S -instcombine < %s | FileCheck %s
@c = common global i8 0, align 1
@a = common global i8 0, align 1
@b = common global i8 0, align 1
define void @func() nounwind uwtable ssp {
entry:
%0 = load i8* @c, align 1
%conv = zext i8 %0 to i32
%or = or i32 %conv, 1
%conv1 = trunc i32 %or to i8
store i8 %conv1, i8* @a, align 1
%conv2 = zext i8 %conv1 to i32
%neg = xor i32 %conv2, -1
%and = and i32 1, %neg
%conv3 = trunc i32 %and to i8
store i8 %conv3, i8* @b, align 1
%1 = load i8* @a, align 1
%conv4 = zext i8 %1 to i32
%conv5 = zext i8 %conv3 to i32
%tobool = icmp ne i32 %conv4, 0
br i1 %tobool, label %land.rhs, label %land.end
land.rhs: ; preds = %entry
%tobool8 = icmp ne i32 %conv5, 0
br label %land.end
land.end: ; preds = %land.rhs, %entry
%2 = phi i1 [ false, %entry ], [ %tobool8, %land.rhs ]
%land.ext = zext i1 %2 to i32
%mul = mul nsw i32 3, %land.ext
%conv9 = trunc i32 %mul to i8
store i8 %conv9, i8* @a, align 1
ret void
; CHECK-LABEL: @func(
; CHECK-NOT: select
}
|
