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[InstCombine] Add tests for trunc nuw/nsw in icmp (NFC)
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‎llvm/test/Transforms/InstCombine/icmp-of-trunc-ext.ll‎

Lines changed: 325 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -268,3 +268,328 @@ define i1 @icmp_trunc_x_zext_y_fail_multiuse(i32 %x, i8 %y) {
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%r = icmp ule i16 %x16, %y16
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ret i1 %r
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}
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define i1 @trunc_unsigned_nuw(i16 %x, i16 %y) {
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; CHECK-LABEL: @trunc_unsigned_nuw(
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; CHECK-NEXT: [[XT:%.*]] = trunc nuw i16 [[X:%.*]] to i8
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; CHECK-NEXT: [[YT:%.*]] = trunc nuw i16 [[Y:%.*]] to i8
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; CHECK-NEXT: [[C:%.*]] = icmp ult i8 [[XT]], [[YT]]
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; CHECK-NEXT: ret i1 [[C]]
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;
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%xt = trunc nuw i16 %x to i8
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%yt = trunc nuw i16 %y to i8
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%c = icmp ult i8 %xt, %yt
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ret i1 %c
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}
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define i1 @trunc_unsigned_nsw(i16 %x, i16 %y) {
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; CHECK-LABEL: @trunc_unsigned_nsw(
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; CHECK-NEXT: [[XT:%.*]] = trunc nsw i16 [[X:%.*]] to i8
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; CHECK-NEXT: [[YT:%.*]] = trunc nsw i16 [[Y:%.*]] to i8
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; CHECK-NEXT: [[C:%.*]] = icmp ult i8 [[XT]], [[YT]]
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; CHECK-NEXT: ret i1 [[C]]
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;
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%xt = trunc nsw i16 %x to i8
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%yt = trunc nsw i16 %y to i8
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%c = icmp ult i8 %xt, %yt
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ret i1 %c
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}
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define i1 @trunc_unsigned_both(i16 %x, i16 %y) {
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; CHECK-LABEL: @trunc_unsigned_both(
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; CHECK-NEXT: [[XT:%.*]] = trunc nuw nsw i16 [[X:%.*]] to i8
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; CHECK-NEXT: [[YT:%.*]] = trunc nuw nsw i16 [[Y:%.*]] to i8
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; CHECK-NEXT: [[C:%.*]] = icmp ult i8 [[XT]], [[YT]]
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; CHECK-NEXT: ret i1 [[C]]
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;
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%xt = trunc nuw nsw i16 %x to i8
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%yt = trunc nuw nsw i16 %y to i8
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%c = icmp ult i8 %xt, %yt
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ret i1 %c
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}
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define i1 @trunc_unsigned_either(i16 %x, i16 %y) {
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; CHECK-LABEL: @trunc_unsigned_either(
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; CHECK-NEXT: [[XT:%.*]] = trunc nuw i16 [[X:%.*]] to i8
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; CHECK-NEXT: [[YT:%.*]] = trunc nsw i16 [[Y:%.*]] to i8
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; CHECK-NEXT: [[C:%.*]] = icmp ult i8 [[XT]], [[YT]]
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; CHECK-NEXT: ret i1 [[C]]
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;
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%xt = trunc nuw i16 %x to i8
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%yt = trunc nsw i16 %y to i8
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%c = icmp ult i8 %xt, %yt
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ret i1 %c
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}
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define i1 @trunc_signed_nuw(i16 %x, i16 %y) {
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; CHECK-LABEL: @trunc_signed_nuw(
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; CHECK-NEXT: [[XT:%.*]] = trunc nuw i16 [[X:%.*]] to i8
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; CHECK-NEXT: [[YT:%.*]] = trunc nuw i16 [[Y:%.*]] to i8
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; CHECK-NEXT: [[C:%.*]] = icmp slt i8 [[XT]], [[YT]]
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; CHECK-NEXT: ret i1 [[C]]
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;
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%xt = trunc nuw i16 %x to i8
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%yt = trunc nuw i16 %y to i8
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%c = icmp slt i8 %xt, %yt
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ret i1 %c
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}
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define i1 @trunc_signed_nsw(i16 %x, i16 %y) {
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; CHECK-LABEL: @trunc_signed_nsw(
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; CHECK-NEXT: [[XT:%.*]] = trunc nsw i16 [[X:%.*]] to i8
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; CHECK-NEXT: [[YT:%.*]] = trunc nsw i16 [[Y:%.*]] to i8
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; CHECK-NEXT: [[C:%.*]] = icmp slt i8 [[XT]], [[YT]]
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; CHECK-NEXT: ret i1 [[C]]
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;
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%xt = trunc nsw i16 %x to i8
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%yt = trunc nsw i16 %y to i8
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%c = icmp slt i8 %xt, %yt
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ret i1 %c
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}
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define i1 @trunc_signed_both(i16 %x, i16 %y) {
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; CHECK-LABEL: @trunc_signed_both(
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; CHECK-NEXT: [[XT:%.*]] = trunc nuw nsw i16 [[X:%.*]] to i8
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; CHECK-NEXT: [[YT:%.*]] = trunc nuw nsw i16 [[Y:%.*]] to i8
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; CHECK-NEXT: [[C:%.*]] = icmp slt i8 [[XT]], [[YT]]
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; CHECK-NEXT: ret i1 [[C]]
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;
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%xt = trunc nuw nsw i16 %x to i8
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%yt = trunc nuw nsw i16 %y to i8
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%c = icmp slt i8 %xt, %yt
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ret i1 %c
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}
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define i1 @trunc_signed_either(i16 %x, i16 %y) {
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; CHECK-LABEL: @trunc_signed_either(
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; CHECK-NEXT: [[XT:%.*]] = trunc nuw i16 [[X:%.*]] to i8
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; CHECK-NEXT: [[YT:%.*]] = trunc nsw i16 [[Y:%.*]] to i8
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; CHECK-NEXT: [[C:%.*]] = icmp slt i8 [[XT]], [[YT]]
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; CHECK-NEXT: ret i1 [[C]]
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;
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%xt = trunc nuw i16 %x to i8
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%yt = trunc nsw i16 %y to i8
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%c = icmp slt i8 %xt, %yt
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ret i1 %c
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}
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define i1 @trunc_equality_nuw(i16 %x, i16 %y) {
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; CHECK-LABEL: @trunc_equality_nuw(
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; CHECK-NEXT: [[XT:%.*]] = trunc nuw i16 [[X:%.*]] to i8
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; CHECK-NEXT: [[YT:%.*]] = trunc nuw i16 [[Y:%.*]] to i8
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; CHECK-NEXT: [[C:%.*]] = icmp eq i8 [[XT]], [[YT]]
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; CHECK-NEXT: ret i1 [[C]]
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;
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%xt = trunc nuw i16 %x to i8
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%yt = trunc nuw i16 %y to i8
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%c = icmp eq i8 %xt, %yt
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ret i1 %c
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}
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define i1 @trunc_equality_nsw(i16 %x, i16 %y) {
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; CHECK-LABEL: @trunc_equality_nsw(
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; CHECK-NEXT: [[XT:%.*]] = trunc nsw i16 [[X:%.*]] to i8
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; CHECK-NEXT: [[YT:%.*]] = trunc nsw i16 [[Y:%.*]] to i8
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; CHECK-NEXT: [[C:%.*]] = icmp eq i8 [[XT]], [[YT]]
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; CHECK-NEXT: ret i1 [[C]]
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;
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%xt = trunc nsw i16 %x to i8
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%yt = trunc nsw i16 %y to i8
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%c = icmp eq i8 %xt, %yt
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ret i1 %c
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}
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define i1 @trunc_equality_both(i16 %x, i16 %y) {
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; CHECK-LABEL: @trunc_equality_both(
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; CHECK-NEXT: [[XT:%.*]] = trunc nuw nsw i16 [[X:%.*]] to i8
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; CHECK-NEXT: [[YT:%.*]] = trunc nuw nsw i16 [[Y:%.*]] to i8
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; CHECK-NEXT: [[C:%.*]] = icmp eq i8 [[XT]], [[YT]]
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; CHECK-NEXT: ret i1 [[C]]
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;
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%xt = trunc nuw nsw i16 %x to i8
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%yt = trunc nuw nsw i16 %y to i8
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%c = icmp eq i8 %xt, %yt
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ret i1 %c
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}
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define i1 @trunc_equality_either(i16 %x, i16 %y) {
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; CHECK-LABEL: @trunc_equality_either(
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; CHECK-NEXT: [[XT:%.*]] = trunc nuw i16 [[X:%.*]] to i8
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; CHECK-NEXT: [[YT:%.*]] = trunc nsw i16 [[Y:%.*]] to i8
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; CHECK-NEXT: [[C:%.*]] = icmp eq i8 [[XT]], [[YT]]
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; CHECK-NEXT: ret i1 [[C]]
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;
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%xt = trunc nuw i16 %x to i8
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%yt = trunc nsw i16 %y to i8
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%c = icmp eq i8 %xt, %yt
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ret i1 %c
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}
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define i1 @trunc_unsigned_nuw_zext(i32 %x, i8 %y) {
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; CHECK-LABEL: @trunc_unsigned_nuw_zext(
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; CHECK-NEXT: [[XT:%.*]] = trunc nuw i32 [[X:%.*]] to i16
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; CHECK-NEXT: [[YE:%.*]] = zext i8 [[Y:%.*]] to i16
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; CHECK-NEXT: [[C:%.*]] = icmp ult i16 [[XT]], [[YE]]
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; CHECK-NEXT: ret i1 [[C]]
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;
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%xt = trunc nuw i32 %x to i16
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%ye = zext i8 %y to i16
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%c = icmp ult i16 %xt, %ye
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ret i1 %c
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}
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define i1 @trunc_unsigned_nuw_sext(i32 %x, i8 %y) {
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; CHECK-LABEL: @trunc_unsigned_nuw_sext(
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; CHECK-NEXT: [[XT:%.*]] = trunc nuw i32 [[X:%.*]] to i16
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; CHECK-NEXT: [[YE:%.*]] = sext i8 [[Y:%.*]] to i16
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; CHECK-NEXT: [[C:%.*]] = icmp ult i16 [[XT]], [[YE]]
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; CHECK-NEXT: ret i1 [[C]]
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;
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%xt = trunc nuw i32 %x to i16
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%ye = sext i8 %y to i16
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%c = icmp ult i16 %xt, %ye
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ret i1 %c
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}
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define i1 @trunc_unsigned_nsw_zext(i32 %x, i8 %y) {
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; CHECK-LABEL: @trunc_unsigned_nsw_zext(
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; CHECK-NEXT: [[XT:%.*]] = trunc nsw i32 [[X:%.*]] to i16
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; CHECK-NEXT: [[YE:%.*]] = zext i8 [[Y:%.*]] to i16
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; CHECK-NEXT: [[C:%.*]] = icmp ult i16 [[XT]], [[YE]]
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; CHECK-NEXT: ret i1 [[C]]
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;
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%xt = trunc nsw i32 %x to i16
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%ye = zext i8 %y to i16
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%c = icmp ult i16 %xt, %ye
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ret i1 %c
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}
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define i1 @trunc_unsigned_nsw_sext(i32 %x, i8 %y) {
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; CHECK-LABEL: @trunc_unsigned_nsw_sext(
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; CHECK-NEXT: [[XT:%.*]] = trunc nsw i32 [[X:%.*]] to i16
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; CHECK-NEXT: [[YE:%.*]] = sext i8 [[Y:%.*]] to i16
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; CHECK-NEXT: [[C:%.*]] = icmp ult i16 [[XT]], [[YE]]
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; CHECK-NEXT: ret i1 [[C]]
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;
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%xt = trunc nsw i32 %x to i16
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%ye = sext i8 %y to i16
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%c = icmp ult i16 %xt, %ye
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ret i1 %c
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}
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define i1 @trunc_signed_nsw_sext(i32 %x, i8 %y) {
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; CHECK-LABEL: @trunc_signed_nsw_sext(
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; CHECK-NEXT: [[XT:%.*]] = trunc nsw i32 [[X:%.*]] to i16
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; CHECK-NEXT: [[YE:%.*]] = sext i8 [[Y:%.*]] to i16
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; CHECK-NEXT: [[C:%.*]] = icmp slt i16 [[XT]], [[YE]]
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; CHECK-NEXT: ret i1 [[C]]
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;
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%xt = trunc nsw i32 %x to i16
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%ye = sext i8 %y to i16
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%c = icmp slt i16 %xt, %ye
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ret i1 %c
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}
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define i1 @trunc_signed_nsw_zext(i32 %x, i8 %y) {
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; CHECK-LABEL: @trunc_signed_nsw_zext(
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; CHECK-NEXT: [[XT:%.*]] = trunc nsw i32 [[X:%.*]] to i16
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; CHECK-NEXT: [[YE:%.*]] = zext i8 [[Y:%.*]] to i16
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; CHECK-NEXT: [[C:%.*]] = icmp slt i16 [[XT]], [[YE]]
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; CHECK-NEXT: ret i1 [[C]]
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;
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%xt = trunc nsw i32 %x to i16
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%ye = zext i8 %y to i16
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%c = icmp slt i16 %xt, %ye
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ret i1 %c
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}
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define i1 @trunc_signed_nuw_sext(i32 %x, i8 %y) {
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; CHECK-LABEL: @trunc_signed_nuw_sext(
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; CHECK-NEXT: [[XT:%.*]] = trunc nuw i32 [[X:%.*]] to i16
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; CHECK-NEXT: [[YE:%.*]] = sext i8 [[Y:%.*]] to i16
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; CHECK-NEXT: [[C:%.*]] = icmp slt i16 [[XT]], [[YE]]
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; CHECK-NEXT: ret i1 [[C]]
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;
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%xt = trunc nuw i32 %x to i16
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%ye = sext i8 %y to i16
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%c = icmp slt i16 %xt, %ye
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ret i1 %c
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}
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define i1 @trunc_signed_nuw_zext(i32 %x, i8 %y) {
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; CHECK-LABEL: @trunc_signed_nuw_zext(
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; CHECK-NEXT: [[XT:%.*]] = trunc nuw i32 [[X:%.*]] to i16
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; CHECK-NEXT: [[YE:%.*]] = zext i8 [[Y:%.*]] to i16
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; CHECK-NEXT: [[C:%.*]] = icmp slt i16 [[XT]], [[YE]]
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; CHECK-NEXT: ret i1 [[C]]
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;
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%xt = trunc nuw i32 %x to i16
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%ye = zext i8 %y to i16
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%c = icmp slt i16 %xt, %ye
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ret i1 %c
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}
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define i1 @trunc_equality_nuw_zext(i32 %x, i8 %y) {
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; CHECK-LABEL: @trunc_equality_nuw_zext(
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; CHECK-NEXT: [[XT:%.*]] = trunc nuw i32 [[X:%.*]] to i16
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; CHECK-NEXT: [[YE:%.*]] = zext i8 [[Y:%.*]] to i16
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; CHECK-NEXT: [[C:%.*]] = icmp ne i16 [[XT]], [[YE]]
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; CHECK-NEXT: ret i1 [[C]]
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;
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%xt = trunc nuw i32 %x to i16
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%ye = zext i8 %y to i16
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%c = icmp ne i16 %xt, %ye
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ret i1 %c
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}
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define i1 @trunc_equality_nuw_sext(i32 %x, i8 %y) {
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; CHECK-LABEL: @trunc_equality_nuw_sext(
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; CHECK-NEXT: [[XT:%.*]] = trunc nuw i32 [[X:%.*]] to i16
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; CHECK-NEXT: [[YE:%.*]] = sext i8 [[Y:%.*]] to i16
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; CHECK-NEXT: [[C:%.*]] = icmp ne i16 [[XT]], [[YE]]
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; CHECK-NEXT: ret i1 [[C]]
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;
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%xt = trunc nuw i32 %x to i16
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%ye = sext i8 %y to i16
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%c = icmp ne i16 %xt, %ye
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ret i1 %c
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}
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define i1 @trunc_equality_nsw_zext(i32 %x, i8 %y) {
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; CHECK-LABEL: @trunc_equality_nsw_zext(
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; CHECK-NEXT: [[XT:%.*]] = trunc nsw i32 [[X:%.*]] to i16
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; CHECK-NEXT: [[YE:%.*]] = zext i8 [[Y:%.*]] to i16
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; CHECK-NEXT: [[C:%.*]] = icmp ne i16 [[XT]], [[YE]]
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; CHECK-NEXT: ret i1 [[C]]
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;
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%xt = trunc nsw i32 %x to i16
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%ye = zext i8 %y to i16
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%c = icmp ne i16 %xt, %ye
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ret i1 %c
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}
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define i1 @trunc_equality_nsw_sext(i32 %x, i8 %y) {
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; CHECK-LABEL: @trunc_equality_nsw_sext(
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; CHECK-NEXT: [[XT:%.*]] = trunc nsw i32 [[X:%.*]] to i16
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; CHECK-NEXT: [[YE:%.*]] = sext i8 [[Y:%.*]] to i16
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; CHECK-NEXT: [[C:%.*]] = icmp ne i16 [[XT]], [[YE]]
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; CHECK-NEXT: ret i1 [[C]]
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;
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%xt = trunc nsw i32 %x to i16
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%ye = sext i8 %y to i16
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%c = icmp ne i16 %xt, %ye
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ret i1 %c
582+
}
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define i1 @trunc_equality_both_sext(i32 %x, i8 %y) {
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; CHECK-LABEL: @trunc_equality_both_sext(
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; CHECK-NEXT: [[XT:%.*]] = trunc nuw nsw i32 [[X:%.*]] to i16
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; CHECK-NEXT: [[YE:%.*]] = sext i8 [[Y:%.*]] to i16
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; CHECK-NEXT: [[C:%.*]] = icmp ne i16 [[XT]], [[YE]]
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; CHECK-NEXT: ret i1 [[C]]
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;
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%xt = trunc nuw nsw i32 %x to i16
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%ye = sext i8 %y to i16
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%c = icmp ne i16 %xt, %ye
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ret i1 %c
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}

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