1; RUN: llc < %s -march=x86 | FileCheck %s
2
3;; Simple case
4define i32 @test1(i8 %x) nounwind readnone {
5  %A = and i8 %x, -32
6  %B = zext i8 %A to i32
7  ret i32 %B
8}
9; CHECK: test1
10; CHECK: movzbl
11; CHECK-NEXT: andl {{.*}}224
12
13;; Multiple uses of %x but easily extensible.
14define i32 @test2(i8 %x) nounwind readnone {
15  %A = and i8 %x, -32
16  %B = zext i8 %A to i32
17  %C = or i8 %x, 63
18  %D = zext i8 %C to i32
19  %E = add i32 %B, %D
20  ret i32 %E
21}
22; CHECK: test2
23; CHECK: movzbl
24; CHECK: orl $63
25; CHECK: andl $224
26
27declare void @use(i32, i8)
28
29;; Multiple uses of %x where we shouldn't extend the load.
30define void @test3(i8 %x) nounwind readnone {
31  %A = and i8 %x, -32
32  %B = zext i8 %A to i32
33  call void @use(i32 %B, i8 %x)
34  ret void
35}
36; CHECK: test3
37; CHECK: movzbl 16(%esp), [[REGISTER:%e[a-z]{2}]]
38; CHECK-NEXT: movl [[REGISTER]], 4(%esp)
39; CHECK-NEXT: andl $224, [[REGISTER]]
40; CHECK-NEXT: movl [[REGISTER]], (%esp)
41; CHECK-NEXT: call{{.*}}use
42