loop-strength-reduce5.ll
1.43 KB
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
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=i686-- | FileCheck %s
@X = weak global i16 0 ; <i16*> [#uses=1]
@Y = weak global i16 0 ; <i16*> [#uses=1]
define void @foo(i32 %N) nounwind {
; CHECK-LABEL: foo:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: movl {{[0-9]+}}(%esp), %eax
; CHECK-NEXT: testl %eax, %eax
; CHECK-NEXT: jle .LBB0_3
; CHECK-NEXT: # %bb.1: # %bb.preheader
; CHECK-NEXT: xorl %ecx, %ecx
; CHECK-NEXT: xorl %edx, %edx
; CHECK-NEXT: .p2align 4, 0x90
; CHECK-NEXT: .LBB0_2: # %bb
; CHECK-NEXT: # =>This Inner Loop Header: Depth=1
; CHECK-NEXT: movw %dx, X
; CHECK-NEXT: movw %cx, Y
; CHECK-NEXT: incl %edx
; CHECK-NEXT: addl $4, %ecx
; CHECK-NEXT: cmpl %edx, %eax
; CHECK-NEXT: jne .LBB0_2
; CHECK-NEXT: .LBB0_3: # %return
; CHECK-NEXT: retl
entry:
%tmp1019 = icmp sgt i32 %N, 0 ; <i1> [#uses=1]
br i1 %tmp1019, label %bb, label %return
bb: ; preds = %bb, %entry
%i.014.0 = phi i32 [ 0, %entry ], [ %indvar.next, %bb ] ; <i32> [#uses=2]
%tmp1 = trunc i32 %i.014.0 to i16 ; <i16> [#uses=2]
store volatile i16 %tmp1, i16* @X, align 2
%tmp34 = shl i16 %tmp1, 2 ; <i16> [#uses=1]
store volatile i16 %tmp34, i16* @Y, align 2
%indvar.next = add i32 %i.014.0, 1 ; <i32> [#uses=2]
%exitcond = icmp eq i32 %indvar.next, %N ; <i1> [#uses=1]
br i1 %exitcond, label %return, label %bb
return: ; preds = %bb, %entry
ret void
}