Skip to content

InstSimplify: increase shufflevector test coverage #92407

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 8 commits into from
May 20, 2024
Merged

InstSimplify: increase shufflevector test coverage #92407

Changes from all commits
Commits
Show all changes
8 commits
Select commit Hold shift + click to select a range
1ffc5fe
InstSimplify: increase shufflevector test coverage
artagnon May 16, 2024
21e90c0
InstSimplify/test: use poison instead of undef
artagnon May 16, 2024
d99b5b5
InstSimplify/shufflevector: add more tests
artagnon May 17, 2024
bc78925
InstSimplify/shufflevector: remove redundant tests
artagnon May 18, 2024
36d7f84
InstSimplify/shufflevector: add multiuse test
artagnon May 18, 2024
2fecbeb
InstSimplify/shufflevector: add negative bitcast test
artagnon May 18, 2024
cedcc81
InstSimplify/shufflevector: add negative cast test
artagnon May 18, 2024
c1e7335
InstSimplify/shufflevector: add identity tests
artagnon May 18, 2024
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
236 changes: 230 additions & 6 deletions llvm/test/Transforms/InstSimplify/shufflevector.ll
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -249,13 +249,13 @@ define <8 x i64> @PR30630(<8 x i64> %x) {
; ret <2 x float> zeroinitializer
define <2 x float> @PR32872(<2 x float> %x) {
; CHECK-LABEL: @PR32872(
; CHECK-NEXT: [[TMP1:%.*]] = shufflevector <2 x float> [[X:%.*]], <2 x float> zeroinitializer, <4 x i32> <i32 2, i32 2, i32 0, i32 1>
; CHECK-NEXT: [[TMP4:%.*]] = shufflevector <4 x float> zeroinitializer, <4 x float> [[TMP1]], <2 x i32> <i32 4, i32 5>
; CHECK-NEXT: ret <2 x float> [[TMP4]]
; CHECK-NEXT: [[SHUF:%.*]] = shufflevector <2 x float> [[X:%.*]], <2 x float> zeroinitializer, <4 x i32> <i32 2, i32 2, i32 0, i32 1>
; CHECK-NEXT: [[SHUF2:%.*]] = shufflevector <4 x float> zeroinitializer, <4 x float> [[SHUF]], <2 x i32> <i32 4, i32 5>
; CHECK-NEXT: ret <2 x float> [[SHUF2]]
;
%tmp1 = shufflevector <2 x float> %x, <2 x float> zeroinitializer, <4 x i32> <i32 2, i32 2, i32 0, i32 1>
%tmp4 = shufflevector <4 x float> zeroinitializer, <4 x float> %tmp1, <2 x i32> <i32 4, i32 5>
ret <2 x float> %tmp4
%shuf = shufflevector <2 x float> %x, <2 x float> zeroinitializer, <4 x i32> <i32 2, i32 2, i32 0, i32 1>
%shuf2 = shufflevector <4 x float> zeroinitializer, <4 x float> %shuf, <2 x i32> <i32 4, i32 5>
ret <2 x float> %shuf2
}

define <5 x i8> @splat_inserted_constant(<4 x i8> %x) {
Expand Down Expand Up @@ -284,3 +284,227 @@ define <2 x i8> @splat_inserted_constant_not_canonical(<3 x i8> %x, <3 x i8> %y)
%splat2 = shufflevector <3 x i8> %y, <3 x i8> %ins2, <2 x i32> <i32 undef, i32 5>
ret <2 x i8> %splat2
}

define <4 x i32> @fold_identity(<4 x i32> %x) {
; CHECK-LABEL: @fold_identity(
; CHECK-NEXT: ret <4 x i32> [[X:%.*]]
;
%shuf = shufflevector <4 x i32> %x, <4 x i32> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
%revshuf = shufflevector <4 x i32> %shuf, <4 x i32> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
ret <4 x i32> %revshuf
}

define <4 x i32> @fold_identity2(<4 x i32> %x) {
; CHECK-LABEL: @fold_identity2(
; CHECK-NEXT: [[SHL:%.*]] = shl <4 x i32> [[X:%.*]], <i32 1, i32 1, i32 1, i32 1>
; CHECK-NEXT: ret <4 x i32> [[SHL]]
;
%shl = shl <4 x i32> %x, <i32 1, i32 1, i32 1, i32 1>
%shuf = shufflevector <4 x i32> %shl, <4 x i32> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
%revshuf = shufflevector <4 x i32> %shuf, <4 x i32> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
ret <4 x i32> %revshuf
}

define <4 x i32> @fold_identity3(<4 x i32> %x) {
; CHECK-LABEL: @fold_identity3(
; CHECK-NEXT: [[SHL:%.*]] = shl <4 x i32> [[X:%.*]], [[X]]
; CHECK-NEXT: ret <4 x i32> [[SHL]]
;
%shl = shl <4 x i32> %x, %x
%shuf = shufflevector <4 x i32> %shl, <4 x i32> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
%revshuf = shufflevector <4 x i32> %shuf, <4 x i32> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
ret <4 x i32> %revshuf
}

define <4 x i32> @not_fold_identity(<4 x i32> %x) {
; CHECK-LABEL: @not_fold_identity(
; CHECK-NEXT: [[SHUF:%.*]] = shufflevector <4 x i32> [[X:%.*]], <4 x i32> poison, <4 x i32> <i32 2, i32 3, i32 0, i32 1>
; CHECK-NEXT: [[REVSHUF:%.*]] = shufflevector <4 x i32> [[SHUF]], <4 x i32> poison, <4 x i32> <i32 1, i32 0, i32 3, i32 2>
; CHECK-NEXT: ret <4 x i32> [[REVSHUF]]
;
%shuf = shufflevector <4 x i32> %x, <4 x i32> poison, <4 x i32> <i32 2, i32 3, i32 0, i32 1>
%revshuf = shufflevector <4 x i32> %shuf, <4 x i32> poison, <4 x i32> <i32 1, i32 0, i32 3, i32 2>
ret <4 x i32> %revshuf
}

define <4 x i32> @not_fold_identity2(<4 x i32> %x) {
; CHECK-LABEL: @not_fold_identity2(
; CHECK-NEXT: [[SHUF:%.*]] = shufflevector <4 x i32> [[X:%.*]], <4 x i32> poison, <4 x i32> <i32 2, i32 3, i32 1, i32 0>
; CHECK-NEXT: [[REVSHUF:%.*]] = shufflevector <4 x i32> [[SHUF]], <4 x i32> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
; CHECK-NEXT: ret <4 x i32> [[REVSHUF]]
;
%shuf = shufflevector <4 x i32> %x, <4 x i32> poison, <4 x i32> <i32 2, i32 3, i32 1, i32 0>
%revshuf = shufflevector <4 x i32> %shuf, <4 x i32> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
ret <4 x i32> %revshuf
}

define <4 x i64> @fold_lookthrough_cast(<4 x i32> %x) {
; CHECK-LABEL: @fold_lookthrough_cast(
; CHECK-NEXT: [[SHUF:%.*]] = shufflevector <4 x i32> [[X:%.*]], <4 x i32> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
; CHECK-NEXT: [[ZEXT:%.*]] = zext <4 x i32> [[SHUF]] to <4 x i64>
; CHECK-NEXT: [[REVSHUF:%.*]] = shufflevector <4 x i64> [[ZEXT]], <4 x i64> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
; CHECK-NEXT: ret <4 x i64> [[REVSHUF]]
;
%shuf = shufflevector <4 x i32> %x, <4 x i32> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
%zext = zext <4 x i32> %shuf to <4 x i64>
%revshuf = shufflevector <4 x i64> %zext, <4 x i64> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
ret <4 x i64> %revshuf
}

define <4 x i64> @not_fold_lookthrough_cast(<4 x i32> %x) {
; CHECK-LABEL: @not_fold_lookthrough_cast(
; CHECK-NEXT: [[ZEXT:%.*]] = zext <4 x i32> [[X:%.*]] to <4 x i64>
; CHECK-NEXT: [[REVSHUF:%.*]] = shufflevector <4 x i64> [[ZEXT]], <4 x i64> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
; CHECK-NEXT: ret <4 x i64> [[REVSHUF]]
;
%zext = zext <4 x i32> %x to <4 x i64>
%revshuf = shufflevector <4 x i64> %zext, <4 x i64> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
ret <4 x i64> %revshuf
}

define <4 x i64> @not_fold_lookthrough_cast2(<4 x i32> %x) {
; CHECK-LABEL: @not_fold_lookthrough_cast2(
; CHECK-NEXT: [[SHUF:%.*]] = shufflevector <4 x i32> [[X:%.*]], <4 x i32> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
; CHECK-NEXT: [[ZEXT:%.*]] = zext <4 x i32> [[SHUF]] to <4 x i64>
; CHECK-NEXT: ret <4 x i64> [[ZEXT]]
;
%shuf = shufflevector <4 x i32> %x, <4 x i32> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
%zext = zext <4 x i32> %shuf to <4 x i64>
ret <4 x i64> %zext
}

define i32 @not_fold_lookthrough_bitcast(<4 x i8> %x) {
; CHECK-LABEL: @not_fold_lookthrough_bitcast(
; CHECK-NEXT: [[SHUF:%.*]] = shufflevector <4 x i8> [[X:%.*]], <4 x i8> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
; CHECK-NEXT: [[BITCAST:%.*]] = bitcast <4 x i8> [[SHUF]] to i32
; CHECK-NEXT: ret i32 [[BITCAST]]
;
%shuf = shufflevector <4 x i8> %x, <4 x i8> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
%bitcast = bitcast <4 x i8> %shuf to i32
ret i32 %bitcast
}

define <8 x i16> @not_fold_lookthrough_bitcast2(<4 x i32> %x, <8 x i16> %y) {
; CHECK-LABEL: @not_fold_lookthrough_bitcast2(
; CHECK-NEXT: [[CAST:%.*]] = bitcast <4 x i32> [[X:%.*]] to <8 x i16>
; CHECK-NEXT: [[OUT:%.*]] = shufflevector <8 x i16> [[Y:%.*]], <8 x i16> [[CAST]], <8 x i32> <i32 8, i32 1, i32 10, i32 3, i32 12, i32 5, i32 14, i32 7>
; CHECK-NEXT: ret <8 x i16> [[OUT]]
;
%cast = bitcast <4 x i32> %x to <8 x i16>
%out = shufflevector <8 x i16> %y, <8 x i16> %cast, <8 x i32> <i32 8, i32 1, i32 10, i32 3, i32 12, i32 5, i32 14, i32 7>
ret <8 x i16> %out
}

define <4 x i32> @fold_lookthrough_binop_same_operands(<4 x i32> %x) {
; CHECK-LABEL: @fold_lookthrough_binop_same_operands(
; CHECK-NEXT: [[SHUF:%.*]] = shufflevector <4 x i32> [[X:%.*]], <4 x i32> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
; CHECK-NEXT: [[ADD:%.*]] = add <4 x i32> [[SHUF]], [[SHUF]]
; CHECK-NEXT: [[REVSHUF:%.*]] = shufflevector <4 x i32> [[ADD]], <4 x i32> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
; CHECK-NEXT: ret <4 x i32> [[REVSHUF]]
;
%shuf = shufflevector <4 x i32> %x, <4 x i32> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
%add = add <4 x i32> %shuf, %shuf
%revshuf = shufflevector <4 x i32> %add, <4 x i32> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
ret <4 x i32> %revshuf
}

define <4 x i32> @fold_lookthrough_binop_different_operands(<4 x i32> %x, <4 x i32> %y) {
; CHECK-LABEL: @fold_lookthrough_binop_different_operands(
; CHECK-NEXT: [[SHUF:%.*]] = shufflevector <4 x i32> [[X:%.*]], <4 x i32> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
; CHECK-NEXT: [[ADD:%.*]] = add <4 x i32> [[SHUF]], [[Y:%.*]]
; CHECK-NEXT: [[REVSHUF:%.*]] = shufflevector <4 x i32> [[ADD]], <4 x i32> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
; CHECK-NEXT: ret <4 x i32> [[REVSHUF]]
;
%shuf = shufflevector <4 x i32> %x, <4 x i32> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
%add = add <4 x i32> %shuf, %y
%revshuf = shufflevector <4 x i32> %add, <4 x i32> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
ret <4 x i32> %revshuf
}

define <4 x i32> @fold_lookthrough_binop_multiuse(<4 x i32> %x) {
; CHECK-LABEL: @fold_lookthrough_binop_multiuse(
; CHECK-NEXT: [[SHUF:%.*]] = shufflevector <4 x i32> [[X:%.*]], <4 x i32> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
; CHECK-NEXT: [[ADD:%.*]] = add <4 x i32> [[SHUF]], [[SHUF]]
; CHECK-NEXT: [[REVSHUF:%.*]] = shufflevector <4 x i32> [[ADD]], <4 x i32> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
; CHECK-NEXT: [[ADD2:%.*]] = add <4 x i32> [[SHUF]], [[REVSHUF]]
; CHECK-NEXT: ret <4 x i32> [[ADD2]]
;
%shuf = shufflevector <4 x i32> %x, <4 x i32> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
%add = add <4 x i32> %shuf, %shuf
%revshuf = shufflevector <4 x i32> %add, <4 x i32> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
%add2 = add <4 x i32> %shuf, %revshuf
ret <4 x i32> %add2
}

define <4 x i64> @fold_lookthrough_cast_chain(<4 x i16> %x) {
; CHECK-LABEL: @fold_lookthrough_cast_chain(
; CHECK-NEXT: [[SHUF:%.*]] = shufflevector <4 x i16> [[X:%.*]], <4 x i16> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
; CHECK-NEXT: [[ZEXT:%.*]] = zext <4 x i16> [[SHUF]] to <4 x i32>
; CHECK-NEXT: [[SEXT:%.*]] = sext <4 x i32> [[ZEXT]] to <4 x i64>
; CHECK-NEXT: [[REVSHUF:%.*]] = shufflevector <4 x i64> [[SEXT]], <4 x i64> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
; CHECK-NEXT: ret <4 x i64> [[REVSHUF]]
;
%shuf = shufflevector <4 x i16> %x, <4 x i16> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
%zext = zext <4 x i16> %shuf to <4 x i32>
%sext = sext <4 x i32> %zext to <4 x i64>
%revshuf = shufflevector <4 x i64> %sext, <4 x i64> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
ret <4 x i64> %revshuf
}

define <4 x i32> @fold_lookthrough_binop_chain(<4 x i32> %x) {
; CHECK-LABEL: @fold_lookthrough_binop_chain(
; CHECK-NEXT: [[SHUF:%.*]] = shufflevector <4 x i32> [[X:%.*]], <4 x i32> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
; CHECK-NEXT: [[ADD:%.*]] = add <4 x i32> [[SHUF]], [[SHUF]]
; CHECK-NEXT: [[ADD2:%.*]] = add <4 x i32> [[ADD]], [[ADD]]
; CHECK-NEXT: [[REVSHUF:%.*]] = shufflevector <4 x i32> [[ADD2]], <4 x i32> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
; CHECK-NEXT: ret <4 x i32> [[REVSHUF]]
;
%shuf = shufflevector <4 x i32> %x, <4 x i32> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
%add = add <4 x i32> %shuf, %shuf
%add2 = add <4 x i32> %add, %add
%revshuf = shufflevector <4 x i32> %add2, <4 x i32> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
ret <4 x i32> %revshuf
}

define <4 x i64> @fold_lookthrough_cast_binop_chain(<4 x i32> %x) {
; CHECK-LABEL: @fold_lookthrough_cast_binop_chain(
; CHECK-NEXT: [[SHUF:%.*]] = shufflevector <4 x i32> [[X:%.*]], <4 x i32> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
; CHECK-NEXT: [[ZEXT:%.*]] = zext <4 x i32> [[SHUF]] to <4 x i64>
; CHECK-NEXT: [[ADD:%.*]] = add <4 x i64> [[ZEXT]], [[ZEXT]]
; CHECK-NEXT: [[REVSHUF:%.*]] = shufflevector <4 x i64> [[ADD]], <4 x i64> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
; CHECK-NEXT: ret <4 x i64> [[REVSHUF]]
;
%shuf = shufflevector <4 x i32> %x, <4 x i32> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
%zext = zext <4 x i32> %shuf to <4 x i64>
%add = add <4 x i64> %zext, %zext
%revshuf = shufflevector <4 x i64> %add, <4 x i64> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
ret <4 x i64> %revshuf
}

define <4 x i64> @not_fold_cast_mismatched_types(<4 x i32> %x) {
; CHECK-LABEL: @not_fold_cast_mismatched_types(
; CHECK-NEXT: [[SHUF:%.*]] = shufflevector <4 x i32> [[X:%.*]], <4 x i32> poison, <2 x i32> <i32 0, i32 2>
; CHECK-NEXT: [[ZEXT:%.*]] = zext <2 x i32> [[SHUF]] to <2 x i64>
; CHECK-NEXT: [[EXTSHUF:%.*]] = shufflevector <2 x i64> [[ZEXT]], <2 x i64> poison, <4 x i32> <i32 0, i32 2, i32 1, i32 3>
; CHECK-NEXT: ret <4 x i64> [[EXTSHUF]]
;
%shuf = shufflevector <4 x i32> %x, <4 x i32> poison, <2 x i32> <i32 0, i32 2>
%zext = zext <2 x i32> %shuf to <2 x i64>
%extshuf = shufflevector <2 x i64> %zext, <2 x i64> poison, <4 x i32> <i32 0, i32 2, i32 1, i32 3>
ret <4 x i64> %extshuf
}

define <4 x float> @not_fold_binop_mismatched_types(<4 x float> %x, <4 x float> %y) {
; CHECK-LABEL: @not_fold_binop_mismatched_types(
; CHECK-NEXT: [[SHUF_X:%.*]] = shufflevector <4 x float> [[X:%.*]], <4 x float> poison, <2 x i32> <i32 0, i32 2>
; CHECK-NEXT: [[SHUF_Y:%.*]] = shufflevector <4 x float> [[Y:%.*]], <4 x float> poison, <2 x i32> <i32 1, i32 3>
; CHECK-NEXT: [[FADD:%.*]] = fadd fast <2 x float> [[SHUF_X]], [[SHUF_Y]]
; CHECK-NEXT: [[EXTSHUF:%.*]] = shufflevector <2 x float> [[FADD]], <2 x float> poison, <4 x i32> <i32 0, i32 2, i32 1, i32 3>
; CHECK-NEXT: ret <4 x float> [[EXTSHUF]]
;
%shuf.x = shufflevector <4 x float> %x, <4 x float> poison, <2 x i32> <i32 0, i32 2>
%shuf.y = shufflevector <4 x float> %y, <4 x float> poison, <2 x i32> <i32 1, i32 3>
%fadd = fadd fast <2 x float> %shuf.x, %shuf.y
%extshuf = shufflevector <2 x float> %fadd, <2 x float> poison, <4 x i32> <i32 0, i32 2, i32 1, i32 3>
ret <4 x float> %extshuf
}
Loading