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[InstCombine] add vector tests for truncated math; NFC 

llvm-svn: 310122
This commit is contained in:
Sanjay Patel 2017-08-04 20:38:33 +00:00
parent bbe96e50f3
commit 73ab438c48
1 changed files with 22 additions and 0 deletions
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22
llvm/test/Transforms/InstCombine/trunc.ll
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@ -533,3 +533,25 @@ define <8 x i8> @wide_lengthening_splat(<4 x i16> %v) {
ret <8 x i8> %tr
}
define <2 x i8> @narrow_add_vec_constant(<2 x i32> %x) {
; CHECK-LABEL: @narrow_add_vec_constant(
; CHECK-NEXT: [[ADD:%.*]] = add <2 x i32> %x, <i32 256, i32 -129>
; CHECK-NEXT: [[TR:%.*]] = trunc <2 x i32> [[ADD]] to <2 x i8>
; CHECK-NEXT: ret <2 x i8> [[TR]]
;
%add = add <2 x i32> %x, <i32 256, i32 -129>
%tr = trunc <2 x i32> %add to <2 x i8>
ret <2 x i8> %tr
}
define <2 x i8> @narrow_sub_vec_constant(<2 x i32> %x) {
; CHECK-LABEL: @narrow_sub_vec_constant(
; CHECK-NEXT: [[SUB:%.*]] = sub <2 x i32> <i32 256, i32 -129>, %x
; CHECK-NEXT: [[TR:%.*]] = trunc <2 x i32> [[SUB]] to <2 x i8>
; CHECK-NEXT: ret <2 x i8> [[TR]]
;
%sub = sub <2 x i32> <i32 256, i32 -129>, %x
%tr = trunc <2 x i32> %sub to <2 x i8>
ret <2 x i8> %tr
}