1; RUN: llc --show-mc-encoding < %s | FileCheck %s
2
3target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
4target triple = "x86_64-apple-darwin10.0.0"
5
6define i32 @f0(i32* nocapture %x) nounwind readonly ssp {
7entry:
8  %tmp1 = load i32, i32* %x                            ; <i32> [#uses=2]
9  %tobool = icmp eq i32 %tmp1, 0                  ; <i1> [#uses=1]
10  br i1 %tobool, label %if.end, label %return
11
12if.end:                                           ; preds = %entry
13
14; Check that we lower to the short form of cmpl, which has a fixed %eax
15; register.
16;
17; CHECK: cmpl $16777216, %eax
18; CHECK: # encoding: [0x3d,0x00,0x00,0x00,0x01]
19  %cmp = icmp eq i32 %tmp1, 16777216              ; <i1> [#uses=1]
20
21  %conv = zext i1 %cmp to i32                     ; <i32> [#uses=1]
22  ret i32 %conv
23
24return:                                           ; preds = %entry
25  ret i32 0
26}
27
28define i32 @f1() nounwind {
29  %ax = tail call i16 asm sideeffect "", "={ax},~{dirflag},~{fpsr},~{flags}"()
30  %conv = sext i16 %ax to i32
31  ret i32 %conv
32
33; CHECK-LABEL: f1:
34; CHECK: cwtl ## encoding: [0x98]
35}
36
37define i64 @f2() nounwind {
38  %eax = tail call i32 asm sideeffect "", "={ax},~{dirflag},~{fpsr},~{flags}"()
39  %conv = sext i32 %eax to i64
40  ret i64 %conv
41
42; CHECK-LABEL: f2:
43; CHECK: cltq ## encoding: [0x48,0x98]
44}
45