maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity

[X86] Add a couple of missed ADD combine tests 

Noticed while investigating PR40483

llvm-svn: 353042
This commit is contained in:
Simon Pilgrim 2019-02-04 12:37:38 +00:00
parent 9899967464
commit fb222aa319
1 changed files with 42 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

42
llvm/test/CodeGen/X86/combine-add.ll
View File

@ -99,6 +99,48 @@ define <4 x i32> @combine_vec_add_sub1(<4 x i32> %a, <4 x i32> %b) {
ret <4 x i32> %2
}
; FIXME: fold ((A-B)+(C-A)) -> (C-B)
define <4 x i32> @combine_vec_add_sub_sub0(<4 x i32> %a, <4 x i32> %b, <4 x i32> %c) {
; SSE-LABEL: combine_vec_add_sub_sub0:
; SSE: # %bb.0:
; SSE-NEXT: psubd %xmm0, %xmm2
; SSE-NEXT: psubd %xmm1, %xmm0
; SSE-NEXT: paddd %xmm2, %xmm0
; SSE-NEXT: retq
;
; AVX-LABEL: combine_vec_add_sub_sub0:
; AVX: # %bb.0:
; AVX-NEXT: vpsubd %xmm1, %xmm0, %xmm1
; AVX-NEXT: vpsubd %xmm0, %xmm2, %xmm0
; AVX-NEXT: vpaddd %xmm0, %xmm1, %xmm0
; AVX-NEXT: retq
%1 = sub <4 x i32> %a, %b
%2 = sub <4 x i32> %c, %a
%3 = add <4 x i32> %1, %2
ret <4 x i32> %3
}
; FIXME: fold ((A-B)+(B-C)) -> (A-C)
define <4 x i32> @combine_vec_add_sub_sub1(<4 x i32> %a, <4 x i32> %b, <4 x i32> %c) {
; SSE-LABEL: combine_vec_add_sub_sub1:
; SSE: # %bb.0:
; SSE-NEXT: psubd %xmm1, %xmm0
; SSE-NEXT: psubd %xmm2, %xmm1
; SSE-NEXT: paddd %xmm1, %xmm0
; SSE-NEXT: retq
;
; AVX-LABEL: combine_vec_add_sub_sub1:
; AVX: # %bb.0:
; AVX-NEXT: vpsubd %xmm1, %xmm0, %xmm0
; AVX-NEXT: vpsubd %xmm2, %xmm1, %xmm1
; AVX-NEXT: vpaddd %xmm1, %xmm0, %xmm0
; AVX-NEXT: retq
%1 = sub <4 x i32> %a, %b
%2 = sub <4 x i32> %b, %c
%3 = add <4 x i32> %1, %2
ret <4 x i32> %3
}
; fold (A+(B-(A+C))) to (B-C)
define <4 x i32> @combine_vec_add_sub_add0(<4 x i32> %a, <4 x i32> %b, <4 x i32> %c) {
; SSE-LABEL: combine_vec_add_sub_add0: