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
|
; RUN: llvm-as < %s | llc -march=x86 | FileCheck %s
define i32 @test1(i32 %x, i32 %n, i32 %w, i32 %v) nounwind readnone {
entry:
; CHECK: test1:
; CHECK: btl
; CHECK-NEXT: movl $12, %eax
; CHECK-NEXT: cmovae 16(%esp), %eax
; CHECK-NEXT: ret
%0 = lshr i32 %x, %n ; <i32> [#uses=1]
%1 = and i32 %0, 1 ; <i32> [#uses=1]
%toBool = icmp eq i32 %1, 0 ; <i1> [#uses=1]
%.0 = select i1 %toBool, i32 %v, i32 12 ; <i32> [#uses=1]
ret i32 %.0
}
define i32 @test2(i32 %x, i32 %n, i32 %w, i32 %v) nounwind readnone {
entry:
; CHECK: test2:
; CHECK: btl
; CHECK-NEXT: movl $12, %eax
; CHECK-NEXT: cmovb 16(%esp), %eax
; CHECK-NEXT: ret
%0 = lshr i32 %x, %n ; <i32> [#uses=1]
%1 = and i32 %0, 1 ; <i32> [#uses=1]
%toBool = icmp eq i32 %1, 0 ; <i1> [#uses=1]
%.0 = select i1 %toBool, i32 12, i32 %v ; <i32> [#uses=1]
ret i32 %.0
}
|
