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[InstCombine] add tests for funnel-shift to bswap; NFC 

llvm-svn: 364184
This commit is contained in:
Sanjay Patel 2019-06-24 14:47:02 +00:00
parent 15e678e843
commit f27f794d47
1 changed files with 37 additions and 0 deletions
llvm/test/Transforms/InstCombine
fsh.ll

37
llvm/test/Transforms/InstCombine/fsh.ll
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@ -538,6 +538,7 @@ define i33 @expanded_fshr_multi_use(i33 %a) {
declare i16 @llvm.fshl.i16(i16, i16, i16)
declare i16 @llvm.fshr.i16(i16, i16, i16)
declare <3 x i16> @llvm.fshl.v3i16(<3 x i16>, <3 x i16>, <3 x i16>)
; Special-case: rotate a 16-bit value left/right by 8-bits is bswap.
@ -559,6 +560,42 @@ define i16 @fshr_bswap(i16 %x) {
ret i16 %r
}
define <3 x i16> @fshl_bswap_vector(<3 x i16> %x) {
; CHECK-LABEL: @fshl_bswap_vector(
; CHECK-NEXT: [[R:%.*]] = call <3 x i16> @llvm.fshl.v3i16(<3 x i16> [[X:%.*]], <3 x i16> [[X]], <3 x i16> <i16 8, i16 8, i16 8>)
; CHECK-NEXT: ret <3 x i16> [[R]]
;
%r = call <3 x i16> @llvm.fshl.v3i16(<3 x i16> %x, <3 x i16> %x, <3 x i16> <i16 8, i16 8, i16 8>)
ret <3 x i16> %r
}
define i16 @fshl_bswap_wrong_op(i16 %x, i16 %y) {
; CHECK-LABEL: @fshl_bswap_wrong_op(
; CHECK-NEXT: [[R:%.*]] = call i16 @llvm.fshl.i16(i16 [[X:%.*]], i16 [[Y:%.*]], i16 8)
; CHECK-NEXT: ret i16 [[R]]
;
%r = call i16 @llvm.fshl.i16(i16 %x, i16 %y, i16 8)
ret i16 %r
}
define i16 @fshr_bswap_wrong_amount(i16 %x) {
; CHECK-LABEL: @fshr_bswap_wrong_amount(
; CHECK-NEXT: [[R:%.*]] = call i16 @llvm.fshl.i16(i16 [[X:%.*]], i16 [[X]], i16 12)
; CHECK-NEXT: ret i16 [[R]]
;
%r = call i16 @llvm.fshr.i16(i16 %x, i16 %x, i16 4)
ret i16 %r
}
define i32 @fshl_bswap_wrong_width(i32 %x) {
; CHECK-LABEL: @fshl_bswap_wrong_width(
; CHECK-NEXT: [[R:%.*]] = call i32 @llvm.fshl.i32(i32 [[X:%.*]], i32 [[X]], i32 8)
; CHECK-NEXT: ret i32 [[R]]
;
%r = call i32 @llvm.fshl.i32(i32 %x, i32 %x, i32 8)
ret i32 %r
}
define i32 @fshl_mask_args_same1(i32 %a) {
; CHECK-LABEL: @fshl_mask_args_same1(
; CHECK-NEXT: [[TMP2:%.*]] = lshr i32 [[A:%.*]], 16