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
| ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=i686-linux -mattr=+sse4.2 | FileCheck %s --check-prefix=X86
; RUN: llc < %s -mtriple=x86_64-linux -mattr=+sse4.2 | FileCheck %s --check-prefix=X64
; PR4891
; Both loads should happen before either store.
define void @short2_int_swap(<2 x i16>* nocapture %b, i32* nocapture %c) nounwind {
; X86-LABEL: short2_int_swap:
; X86: # %bb.0: # %entry
; X86-NEXT: pushl %esi
; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
; X86-NEXT: movl {{[0-9]+}}(%esp), %ecx
; X86-NEXT: movl (%ecx), %edx
; X86-NEXT: movl (%eax), %esi
; X86-NEXT: movl %edx, (%eax)
; X86-NEXT: movl %esi, (%ecx)
; X86-NEXT: popl %esi
; X86-NEXT: retl
;
; X64-LABEL: short2_int_swap:
; X64: # %bb.0: # %entry
; X64-NEXT: movl (%rsi), %eax
; X64-NEXT: movl (%rdi), %ecx
; X64-NEXT: movl %eax, (%rdi)
; X64-NEXT: movl %ecx, (%rsi)
; X64-NEXT: retq
entry:
%0 = load <2 x i16>, <2 x i16>* %b, align 2 ; <<2 x i16>> [#uses=1]
%1 = load i32, i32* %c, align 4 ; <i32> [#uses=1]
%tmp1 = bitcast i32 %1 to <2 x i16> ; <<2 x i16>> [#uses=1]
store <2 x i16> %tmp1, <2 x i16>* %b, align 2
%tmp5 = bitcast <2 x i16> %0 to <1 x i32> ; <<1 x i32>> [#uses=1]
%tmp3 = extractelement <1 x i32> %tmp5, i32 0 ; <i32> [#uses=1]
store i32 %tmp3, i32* %c, align 4
ret void
}
|