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

[InstCombine] add more tests for shuffle with different binops; NFC 

llvm-svn: 335756
This commit is contained in:
Sanjay Patel 2018-06-27 17:21:57 +00:00
parent 3209b28aa9
commit 7e45aebe55
1 changed files with 36 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

36
llvm/test/Transforms/InstCombine/shuffle_select.ll
View File

@ -296,3 +296,39 @@ define <4 x i32> @shl_mul_not_constant_shift_amount(<4 x i32> %v0) {
ret <4 x i32> %t3
}
; Or with constant can be converted to add to enable the fold.
; The 'shl' is here to allow analysis to determine that the 'or' can be transformed to 'add'.
; TODO: The 'or' constant is limited to a splat.
define <4 x i32> @add_or(<4 x i32> %v) {
; CHECK-LABEL: @add_or(
; CHECK-NEXT: [[V0:%.*]] = shl <4 x i32> [[V:%.*]], <i32 5, i32 5, i32 5, i32 5>
; CHECK-NEXT: [[T1:%.*]] = add <4 x i32> [[V0]], <i32 undef, i32 undef, i32 65536, i32 65537>
; CHECK-NEXT: [[T2:%.*]] = or <4 x i32> [[V0]], <i32 31, i32 31, i32 undef, i32 undef>
; CHECK-NEXT: [[T3:%.*]] = shufflevector <4 x i32> [[T1]], <4 x i32> [[T2]], <4 x i32> <i32 4, i32 5, i32 2, i32 3>
; CHECK-NEXT: ret <4 x i32> [[T3]]
;
%v0 = shl <4 x i32> %v, <i32 5, i32 5, i32 5, i32 5> ; clear the bottom bits
%t1 = add <4 x i32> %v0, <i32 65534, i32 65535, i32 65536, i32 65537> ; this can't be converted to 'or'
%t2 = or <4 x i32> %v0, <i32 31, i32 31, i32 31, i32 31> ; set the bottom bits
%t3 = shufflevector <4 x i32> %t1, <4 x i32> %t2, <4 x i32> <i32 4, i32 5, i32 2, i32 3>
ret <4 x i32> %t3
}
; Try with 'or' as operand 0 of the shuffle.
define <4 x i8> @or_add(<4 x i8> %v) {
; CHECK-LABEL: @or_add(
; CHECK-NEXT: [[V0:%.*]] = lshr <4 x i8> [[V:%.*]], <i8 3, i8 3, i8 3, i8 3>
; CHECK-NEXT: [[T1:%.*]] = or <4 x i8> [[V0]], <i8 undef, i8 undef, i8 -64, i8 -64>
; CHECK-NEXT: [[T2:%.*]] = add nuw nsw <4 x i8> [[V0]], <i8 1, i8 2, i8 undef, i8 undef>
; CHECK-NEXT: [[T3:%.*]] = shufflevector <4 x i8> [[T1]], <4 x i8> [[T2]], <4 x i32> <i32 4, i32 5, i32 2, i32 3>
; CHECK-NEXT: ret <4 x i8> [[T3]]
;
%v0 = lshr <4 x i8> %v, <i8 3, i8 3, i8 3, i8 3> ; clear the top bits
%t1 = or <4 x i8> %v0, <i8 192, i8 192, i8 192, i8 192> ; set some top bits
%t2 = add nsw nuw <4 x i8> %v0, <i8 1, i8 2, i8 3, i8 4> ; this can't be converted to 'or'
%t3 = shufflevector <4 x i8> %t1, <4 x i8> %t2, <4 x i32> <i32 4, i32 5, i32 2, i32 3>
ret <4 x i8> %t3
}