forked from OSchip/llvm-project
220 lines
5.9 KiB
LLVM
220 lines
5.9 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -instcombine -S | FileCheck %s
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; icmp u/s (a ^ signmask), (b ^ signmask) --> icmp s/u a, b
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define i1 @slt_to_ult(i8 %x, i8 %y) {
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; CHECK-LABEL: @slt_to_ult(
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; CHECK-NEXT: [[CMP:%.*]] = icmp ult i8 %x, %y
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; CHECK-NEXT: ret i1 [[CMP]]
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;
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%a = xor i8 %x, 128
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%b = xor i8 %y, 128
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%cmp = icmp slt i8 %a, %b
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ret i1 %cmp
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}
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; PR33138 - https://bugs.llvm.org/show_bug.cgi?id=33138
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define <2 x i1> @slt_to_ult_splat(<2 x i8> %x, <2 x i8> %y) {
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; CHECK-LABEL: @slt_to_ult_splat(
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; CHECK-NEXT: [[CMP:%.*]] = icmp ult <2 x i8> %x, %y
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; CHECK-NEXT: ret <2 x i1> [[CMP]]
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;
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%a = xor <2 x i8> %x, <i8 128, i8 128>
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%b = xor <2 x i8> %y, <i8 128, i8 128>
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%cmp = icmp slt <2 x i8> %a, %b
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ret <2 x i1> %cmp
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}
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; Make sure that unsigned -> signed works too.
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define i1 @ult_to_slt(i8 %x, i8 %y) {
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; CHECK-LABEL: @ult_to_slt(
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; CHECK-NEXT: [[CMP:%.*]] = icmp slt i8 %x, %y
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; CHECK-NEXT: ret i1 [[CMP]]
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;
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%a = xor i8 %x, 128
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%b = xor i8 %y, 128
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%cmp = icmp ult i8 %a, %b
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ret i1 %cmp
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}
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define <2 x i1> @ult_to_slt_splat(<2 x i8> %x, <2 x i8> %y) {
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; CHECK-LABEL: @ult_to_slt_splat(
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; CHECK-NEXT: [[CMP:%.*]] = icmp slt <2 x i8> %x, %y
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; CHECK-NEXT: ret <2 x i1> [[CMP]]
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;
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%a = xor <2 x i8> %x, <i8 128, i8 128>
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%b = xor <2 x i8> %y, <i8 128, i8 128>
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%cmp = icmp ult <2 x i8> %a, %b
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ret <2 x i1> %cmp
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}
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; icmp u/s (a ^ maxsignval), (b ^ maxsignval) --> icmp s/u' a, b
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define i1 @slt_to_ugt(i8 %x, i8 %y) {
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; CHECK-LABEL: @slt_to_ugt(
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; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i8 %x, %y
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; CHECK-NEXT: ret i1 [[CMP]]
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;
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%a = xor i8 %x, 127
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%b = xor i8 %y, 127
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%cmp = icmp slt i8 %a, %b
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ret i1 %cmp
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}
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define <2 x i1> @slt_to_ugt_splat(<2 x i8> %x, <2 x i8> %y) {
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; CHECK-LABEL: @slt_to_ugt_splat(
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; CHECK-NEXT: [[CMP:%.*]] = icmp ugt <2 x i8> %x, %y
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; CHECK-NEXT: ret <2 x i1> [[CMP]]
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;
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%a = xor <2 x i8> %x, <i8 127, i8 127>
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%b = xor <2 x i8> %y, <i8 127, i8 127>
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%cmp = icmp slt <2 x i8> %a, %b
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ret <2 x i1> %cmp
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}
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; Make sure that unsigned -> signed works too.
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define i1 @ult_to_sgt(i8 %x, i8 %y) {
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; CHECK-LABEL: @ult_to_sgt(
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; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i8 %x, %y
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; CHECK-NEXT: ret i1 [[CMP]]
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;
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%a = xor i8 %x, 127
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%b = xor i8 %y, 127
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%cmp = icmp ult i8 %a, %b
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ret i1 %cmp
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}
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define <2 x i1> @ult_to_sgt_splat(<2 x i8> %x, <2 x i8> %y) {
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; CHECK-LABEL: @ult_to_sgt_splat(
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; CHECK-NEXT: [[CMP:%.*]] = icmp sgt <2 x i8> %x, %y
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; CHECK-NEXT: ret <2 x i1> [[CMP]]
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;
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%a = xor <2 x i8> %x, <i8 127, i8 127>
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%b = xor <2 x i8> %y, <i8 127, i8 127>
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%cmp = icmp ult <2 x i8> %a, %b
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ret <2 x i1> %cmp
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}
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; icmp u/s (a ^ signmask), C --> icmp s/u a, C'
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define i1 @sge_to_ugt(i8 %x) {
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; CHECK-LABEL: @sge_to_ugt(
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; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i8 %x, -114
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; CHECK-NEXT: ret i1 [[CMP]]
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;
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%a = xor i8 %x, 128
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%cmp = icmp sge i8 %a, 15
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ret i1 %cmp
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}
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define <2 x i1> @sge_to_ugt_splat(<2 x i8> %x) {
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; CHECK-LABEL: @sge_to_ugt_splat(
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; CHECK-NEXT: [[CMP:%.*]] = icmp ugt <2 x i8> %x, <i8 -114, i8 -114>
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; CHECK-NEXT: ret <2 x i1> [[CMP]]
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;
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%a = xor <2 x i8> %x, <i8 128, i8 128>
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%cmp = icmp sge <2 x i8> %a, <i8 15, i8 15>
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ret <2 x i1> %cmp
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}
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; Make sure that unsigned -> signed works too.
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define i1 @uge_to_sgt(i8 %x) {
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; CHECK-LABEL: @uge_to_sgt(
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; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i8 %x, -114
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; CHECK-NEXT: ret i1 [[CMP]]
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;
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%a = xor i8 %x, 128
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%cmp = icmp uge i8 %a, 15
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ret i1 %cmp
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}
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define <2 x i1> @uge_to_sgt_splat(<2 x i8> %x) {
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; CHECK-LABEL: @uge_to_sgt_splat(
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; CHECK-NEXT: [[CMP:%.*]] = icmp sgt <2 x i8> %x, <i8 -114, i8 -114>
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; CHECK-NEXT: ret <2 x i1> [[CMP]]
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;
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%a = xor <2 x i8> %x, <i8 128, i8 128>
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%cmp = icmp uge <2 x i8> %a, <i8 15, i8 15>
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ret <2 x i1> %cmp
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}
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; icmp u/s (a ^ maxsignval), C --> icmp s/u' a, C'
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define i1 @sge_to_ult(i8 %x) {
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; CHECK-LABEL: @sge_to_ult(
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; CHECK-NEXT: [[CMP:%.*]] = icmp ult i8 %x, 113
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; CHECK-NEXT: ret i1 [[CMP]]
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;
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%a = xor i8 %x, 127
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%cmp = icmp sge i8 %a, 15
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ret i1 %cmp
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}
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define <2 x i1> @sge_to_ult_splat(<2 x i8> %x) {
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; CHECK-LABEL: @sge_to_ult_splat(
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; CHECK-NEXT: [[CMP:%.*]] = icmp ult <2 x i8> %x, <i8 113, i8 113>
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; CHECK-NEXT: ret <2 x i1> [[CMP]]
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;
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%a = xor <2 x i8> %x, <i8 127, i8 127>
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%cmp = icmp sge <2 x i8> %a, <i8 15, i8 15>
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ret <2 x i1> %cmp
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}
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; Make sure that unsigned -> signed works too.
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define i1 @uge_to_slt(i8 %x) {
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; CHECK-LABEL: @uge_to_slt(
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; CHECK-NEXT: [[CMP:%.*]] = icmp slt i8 %x, 113
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; CHECK-NEXT: ret i1 [[CMP]]
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;
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%a = xor i8 %x, 127
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%cmp = icmp uge i8 %a, 15
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ret i1 %cmp
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}
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define <2 x i1> @uge_to_slt_splat(<2 x i8> %x) {
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; CHECK-LABEL: @uge_to_slt_splat(
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; CHECK-NEXT: [[CMP:%.*]] = icmp slt <2 x i8> %x, <i8 113, i8 113>
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; CHECK-NEXT: ret <2 x i1> [[CMP]]
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;
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%a = xor <2 x i8> %x, <i8 127, i8 127>
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%cmp = icmp uge <2 x i8> %a, <i8 15, i8 15>
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ret <2 x i1> %cmp
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}
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; PR33138, part 2: https://bugs.llvm.org/show_bug.cgi?id=33138
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; Bitcast canonicalization ensures that we recognize the signbit constant.
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define <8 x i1> @sgt_to_ugt_bitcasted_splat(<2 x i32> %x, <2 x i32> %y) {
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; CHECK-LABEL: @sgt_to_ugt_bitcasted_splat(
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; CHECK-NEXT: [[TMP1:%.*]] = bitcast <2 x i32> %x to <8 x i8>
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; CHECK-NEXT: [[TMP2:%.*]] = bitcast <2 x i32> %y to <8 x i8>
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; CHECK-NEXT: [[E:%.*]] = icmp ugt <8 x i8> [[TMP1]], [[TMP2]]
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; CHECK-NEXT: ret <8 x i1> [[E]]
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;
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%a = xor <2 x i32> %x, <i32 2155905152, i32 2155905152> ; 0x80808080
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%b = xor <2 x i32> %y, <i32 2155905152, i32 2155905152>
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%c = bitcast <2 x i32> %a to <8 x i8>
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%d = bitcast <2 x i32> %b to <8 x i8>
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%e = icmp sgt <8 x i8> %c, %d
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ret <8 x i1> %e
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}
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; Bitcast canonicalization ensures that we recognize the signbit constant.
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define <2 x i1> @negative_simplify_splat(<4 x i8> %x) {
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; CHECK-LABEL: @negative_simplify_splat(
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; CHECK-NEXT: ret <2 x i1> zeroinitializer
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;
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%a = or <4 x i8> %x, <i8 0, i8 128, i8 0, i8 128>
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%b = bitcast <4 x i8> %a to <2 x i16>
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%c = icmp sgt <2 x i16> %b, zeroinitializer
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ret <2 x i1> %c
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}
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