derek.holloway
7502bf64a4
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163 lines
6.6 KiB
LLVM
163 lines
6.6 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -passes=instcombine -S | FileCheck %s
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declare { <2 x i32>, <2 x i1> } @llvm.ssub.with.overflow.v2i32(<2 x i32>, <2 x i32>)
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declare { <2 x i8>, <2 x i1> } @llvm.ssub.with.overflow.v2i8(<2 x i8>, <2 x i8>)
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declare { i32, i1 } @llvm.ssub.with.overflow.i32(i32, i32)
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declare { i8, i1 } @llvm.ssub.with.overflow.i8(i8, i8)
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define { i32, i1 } @simple_fold(i32 %x) {
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; CHECK-LABEL: @simple_fold(
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; CHECK-NEXT: [[B:%.*]] = call { i32, i1 } @llvm.sadd.with.overflow.i32(i32 [[X:%.*]], i32 -20)
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; CHECK-NEXT: ret { i32, i1 } [[B]]
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;
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%a = sub nsw i32 %x, 7
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%b = tail call { i32, i1 } @llvm.ssub.with.overflow.i32(i32 %a, i32 13)
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ret { i32, i1 } %b
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}
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define { i32, i1 } @fold_mixed_signs(i32 %x) {
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; CHECK-LABEL: @fold_mixed_signs(
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; CHECK-NEXT: [[B:%.*]] = add nsw i32 [[X:%.*]], -6
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; CHECK-NEXT: [[TMP1:%.*]] = insertvalue { i32, i1 } { i32 poison, i1 false }, i32 [[B]], 0
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; CHECK-NEXT: ret { i32, i1 } [[TMP1]]
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;
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%a = sub nsw i32 %x, 13
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%b = tail call { i32, i1 } @llvm.ssub.with.overflow.i32(i32 %a, i32 -7)
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ret { i32, i1 } %b
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}
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define { i8, i1 } @fold_on_constant_sub_no_overflow(i8 %x) {
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; CHECK-LABEL: @fold_on_constant_sub_no_overflow(
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; CHECK-NEXT: [[B:%.*]] = call { i8, i1 } @llvm.sadd.with.overflow.i8(i8 [[X:%.*]], i8 -128)
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; CHECK-NEXT: ret { i8, i1 } [[B]]
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;
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%a = sub nsw i8 %x, 100
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%b = tail call { i8, i1 } @llvm.ssub.with.overflow.i8(i8 %a, i8 28)
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ret { i8, i1 } %b
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}
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define { i8, i1 } @no_fold_on_constant_sub_overflow(i8 %x) {
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; CHECK-LABEL: @no_fold_on_constant_sub_overflow(
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; CHECK-NEXT: [[A:%.*]] = add nsw i8 [[X:%.*]], -100
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; CHECK-NEXT: [[B:%.*]] = call { i8, i1 } @llvm.sadd.with.overflow.i8(i8 [[A]], i8 -29)
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; CHECK-NEXT: ret { i8, i1 } [[B]]
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;
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%a = sub nsw i8 %x, 100
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%b = tail call { i8, i1 } @llvm.ssub.with.overflow.i8(i8 %a, i8 29)
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ret { i8, i1 } %b
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}
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define { <2 x i32>, <2 x i1> } @fold_simple_splat_constant(<2 x i32> %x) {
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; CHECK-LABEL: @fold_simple_splat_constant(
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; CHECK-NEXT: [[B:%.*]] = call { <2 x i32>, <2 x i1> } @llvm.sadd.with.overflow.v2i32(<2 x i32> [[X:%.*]], <2 x i32> splat (i32 -42))
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; CHECK-NEXT: ret { <2 x i32>, <2 x i1> } [[B]]
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;
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%a = sub nsw <2 x i32> %x, <i32 12, i32 12>
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%b = tail call { <2 x i32>, <2 x i1> } @llvm.ssub.with.overflow.v2i32(<2 x i32> %a, <2 x i32> <i32 30, i32 30>)
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ret { <2 x i32>, <2 x i1> } %b
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}
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define { <2 x i32>, <2 x i1> } @no_fold_splat_undef_constant(<2 x i32> %x) {
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; CHECK-LABEL: @no_fold_splat_undef_constant(
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; CHECK-NEXT: [[A:%.*]] = add <2 x i32> [[X:%.*]], <i32 -12, i32 undef>
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; CHECK-NEXT: [[B:%.*]] = call { <2 x i32>, <2 x i1> } @llvm.sadd.with.overflow.v2i32(<2 x i32> [[A]], <2 x i32> splat (i32 -30))
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; CHECK-NEXT: ret { <2 x i32>, <2 x i1> } [[B]]
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;
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%a = sub nsw <2 x i32> %x, <i32 12, i32 undef>
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%b = tail call { <2 x i32>, <2 x i1> } @llvm.ssub.with.overflow.v2i32(<2 x i32> %a, <2 x i32> <i32 30, i32 30>)
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ret { <2 x i32>, <2 x i1> } %b
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}
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define { <2 x i32>, <2 x i1> } @no_fold_splat_not_constant(<2 x i32> %x, <2 x i32> %y) {
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; CHECK-LABEL: @no_fold_splat_not_constant(
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; CHECK-NEXT: [[A:%.*]] = sub nsw <2 x i32> [[X:%.*]], [[Y:%.*]]
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; CHECK-NEXT: [[B:%.*]] = call { <2 x i32>, <2 x i1> } @llvm.sadd.with.overflow.v2i32(<2 x i32> [[A]], <2 x i32> splat (i32 -30))
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; CHECK-NEXT: ret { <2 x i32>, <2 x i1> } [[B]]
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;
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%a = sub nsw <2 x i32> %x, %y
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%b = tail call { <2 x i32>, <2 x i1> } @llvm.ssub.with.overflow.v2i32(<2 x i32> %a, <2 x i32> <i32 30, i32 30>)
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ret { <2 x i32>, <2 x i1> } %b
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}
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define { i32, i1 } @fold_nuwnsw(i32 %x) {
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; CHECK-LABEL: @fold_nuwnsw(
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; CHECK-NEXT: [[B:%.*]] = call { i32, i1 } @llvm.sadd.with.overflow.i32(i32 [[X:%.*]], i32 -42)
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; CHECK-NEXT: ret { i32, i1 } [[B]]
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;
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%a = sub nuw nsw i32 %x, 12
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%b = tail call { i32, i1 } @llvm.ssub.with.overflow.i32(i32 %a, i32 30)
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ret { i32, i1 } %b
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}
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define { i32, i1 } @no_fold_nuw(i32 %x) {
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; CHECK-LABEL: @no_fold_nuw(
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; CHECK-NEXT: [[A:%.*]] = add i32 [[X:%.*]], -12
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; CHECK-NEXT: [[B:%.*]] = call { i32, i1 } @llvm.sadd.with.overflow.i32(i32 [[A]], i32 -30)
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; CHECK-NEXT: ret { i32, i1 } [[B]]
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;
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%a = sub nuw i32 %x, 12
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%b = tail call { i32, i1 } @llvm.ssub.with.overflow.i32(i32 %a, i32 30)
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ret { i32, i1 } %b
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}
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define { i32, i1 } @no_fold_wrapped_sub(i32 %x) {
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; CHECK-LABEL: @no_fold_wrapped_sub(
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; CHECK-NEXT: [[A:%.*]] = add i32 [[X:%.*]], -12
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; CHECK-NEXT: [[B:%.*]] = tail call { i32, i1 } @llvm.ssub.with.overflow.i32(i32 30, i32 [[A]])
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; CHECK-NEXT: ret { i32, i1 } [[B]]
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;
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%a = sub i32 %x, 12
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%b = tail call { i32, i1 } @llvm.ssub.with.overflow.i32(i32 30, i32 %a)
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ret { i32, i1 } %b
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}
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define { i32, i1 } @fold_add_simple(i32 %x) {
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; CHECK-LABEL: @fold_add_simple(
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; CHECK-NEXT: [[B:%.*]] = call { i32, i1 } @llvm.sadd.with.overflow.i32(i32 [[X:%.*]], i32 -42)
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; CHECK-NEXT: ret { i32, i1 } [[B]]
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;
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%a = add nsw i32 %x, -12
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%b = tail call { i32, i1 } @llvm.ssub.with.overflow.i32(i32 %a, i32 30)
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ret { i32, i1 } %b
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}
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define { <2 x i32>, <2 x i1> } @keep_ssubo_undef(<2 x i32> %x) {
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; CHECK-LABEL: @keep_ssubo_undef(
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; CHECK-NEXT: [[A:%.*]] = tail call { <2 x i32>, <2 x i1> } @llvm.ssub.with.overflow.v2i32(<2 x i32> [[X:%.*]], <2 x i32> <i32 30, i32 undef>)
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; CHECK-NEXT: ret { <2 x i32>, <2 x i1> } [[A]]
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;
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%a = tail call { <2 x i32>, <2 x i1> } @llvm.ssub.with.overflow.v2i32(<2 x i32> %x, <2 x i32> <i32 30, i32 undef>)
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ret { <2 x i32>, <2 x i1> } %a
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}
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define { <2 x i32>, <2 x i1> } @keep_ssubo_non_splat(<2 x i32> %x) {
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; CHECK-LABEL: @keep_ssubo_non_splat(
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; CHECK-NEXT: [[A:%.*]] = call { <2 x i32>, <2 x i1> } @llvm.sadd.with.overflow.v2i32(<2 x i32> [[X:%.*]], <2 x i32> <i32 -30, i32 -31>)
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; CHECK-NEXT: ret { <2 x i32>, <2 x i1> } [[A]]
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;
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%a = tail call { <2 x i32>, <2 x i1> } @llvm.ssub.with.overflow.v2i32(<2 x i32> %x, <2 x i32> <i32 30, i32 31>)
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ret { <2 x i32>, <2 x i1> } %a
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}
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define { <2 x i8>, <2 x i1> } @keep_ssubo_one_element_is_128(<2 x i8> %x) {
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; CHECK-LABEL: @keep_ssubo_one_element_is_128(
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; CHECK-NEXT: [[A:%.*]] = tail call { <2 x i8>, <2 x i1> } @llvm.ssub.with.overflow.v2i8(<2 x i8> [[X:%.*]], <2 x i8> <i8 0, i8 -128>)
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; CHECK-NEXT: ret { <2 x i8>, <2 x i1> } [[A]]
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;
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%a = tail call { <2 x i8>, <2 x i1> } @llvm.ssub.with.overflow.v2i8(<2 x i8> %x, <2 x i8> <i8 0, i8 -128>)
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ret { <2 x i8>, <2 x i1> } %a
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}
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define { i8, i1 } @keep_ssubo_128(i8 %x) {
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; CHECK-LABEL: @keep_ssubo_128(
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; CHECK-NEXT: [[A:%.*]] = tail call { i8, i1 } @llvm.ssub.with.overflow.i8(i8 [[X:%.*]], i8 -128)
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; CHECK-NEXT: ret { i8, i1 } [[A]]
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;
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%a = tail call { i8, i1 } @llvm.ssub.with.overflow.i8(i8 %x, i8 -128)
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ret { i8, i1 } %a
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}
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