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[InstCombine] Add tests for add nsw + sadd.with.overflow; NFC
Baseline tests for D58881, which fixes part of PR38146. Patch by Dan Robertson. llvm-svn: 355328
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py | ||
; RUN: opt < %s -instcombine -S | FileCheck %s | ||
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declare { <2 x i32>, <2 x i1> } @llvm.sadd.with.overflow.v2i32(<2 x i32>, <2 x i32>) | ||
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declare { i32, i1 } @llvm.sadd.with.overflow.i32(i32, i32) | ||
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declare { i8, i1 } @llvm.sadd.with.overflow.i8(i8, i8) | ||
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define { i32, i1 } @simple_fold(i32) { | ||
; CHECK-LABEL: @simple_fold( | ||
; CHECK-NEXT: [[TMP2:%.*]] = add nsw i32 [[TMP0:%.*]], 7 | ||
; CHECK-NEXT: [[TMP3:%.*]] = tail call { i32, i1 } @llvm.sadd.with.overflow.i32(i32 [[TMP2]], i32 13) | ||
; CHECK-NEXT: ret { i32, i1 } [[TMP3]] | ||
; | ||
%2 = add nsw i32 %0, 7 | ||
%3 = tail call { i32, i1 } @llvm.sadd.with.overflow.i32(i32 %2, i32 13) | ||
ret { i32, i1 } %3 | ||
} | ||
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define { i32, i1 } @fold_mixed_signs(i32) { | ||
; CHECK-LABEL: @fold_mixed_signs( | ||
; CHECK-NEXT: [[TMP2:%.*]] = add nsw i32 [[TMP0:%.*]], 13 | ||
; CHECK-NEXT: [[TMP3:%.*]] = tail call { i32, i1 } @llvm.sadd.with.overflow.i32(i32 [[TMP2]], i32 -7) | ||
; CHECK-NEXT: ret { i32, i1 } [[TMP3]] | ||
; | ||
%2 = add nsw i32 %0, 13 | ||
%3 = tail call { i32, i1 } @llvm.sadd.with.overflow.i32(i32 %2, i32 -7) | ||
ret { i32, i1 } %3 | ||
} | ||
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define { i8, i1 } @no_fold_on_constant_add_overflow(i8) { | ||
; CHECK-LABEL: @no_fold_on_constant_add_overflow( | ||
; CHECK-NEXT: [[TMP2:%.*]] = add nsw i8 [[TMP0:%.*]], 127 | ||
; CHECK-NEXT: [[TMP3:%.*]] = tail call { i8, i1 } @llvm.sadd.with.overflow.i8(i8 [[TMP2]], i8 127) | ||
; CHECK-NEXT: ret { i8, i1 } [[TMP3]] | ||
; | ||
%2 = add nsw i8 %0, 127 | ||
%3 = tail call { i8, i1 } @llvm.sadd.with.overflow.i8(i8 %2, i8 127) | ||
ret { i8, i1 } %3 | ||
} | ||
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define { <2 x i32>, <2 x i1> } @fold_simple_splat_constant(<2 x i32>) { | ||
; CHECK-LABEL: @fold_simple_splat_constant( | ||
; CHECK-NEXT: [[TMP2:%.*]] = add nsw <2 x i32> [[TMP0:%.*]], <i32 12, i32 12> | ||
; CHECK-NEXT: [[TMP3:%.*]] = tail call { <2 x i32>, <2 x i1> } @llvm.sadd.with.overflow.v2i32(<2 x i32> [[TMP2]], <2 x i32> <i32 30, i32 30>) | ||
; CHECK-NEXT: ret { <2 x i32>, <2 x i1> } [[TMP3]] | ||
; | ||
%2 = add nsw <2 x i32> %0, <i32 12, i32 12> | ||
%3 = tail call { <2 x i32>, <2 x i1> } @llvm.sadd.with.overflow.v2i32(<2 x i32> %2, <2 x i32> <i32 30, i32 30>) | ||
ret { <2 x i32>, <2 x i1> } %3 | ||
} | ||
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define { <2 x i32>, <2 x i1> } @no_fold_splat_undef_constant(<2 x i32>) { | ||
; CHECK-LABEL: @no_fold_splat_undef_constant( | ||
; CHECK-NEXT: [[TMP2:%.*]] = add nsw <2 x i32> [[TMP0:%.*]], <i32 12, i32 undef> | ||
; CHECK-NEXT: [[TMP3:%.*]] = tail call { <2 x i32>, <2 x i1> } @llvm.sadd.with.overflow.v2i32(<2 x i32> [[TMP2]], <2 x i32> <i32 30, i32 30>) | ||
; CHECK-NEXT: ret { <2 x i32>, <2 x i1> } [[TMP3]] | ||
; | ||
%2 = add nsw <2 x i32> %0, <i32 12, i32 undef> | ||
%3 = tail call { <2 x i32>, <2 x i1> } @llvm.sadd.with.overflow.v2i32(<2 x i32> %2, <2 x i32> <i32 30, i32 30>) | ||
ret { <2 x i32>, <2 x i1> } %3 | ||
} | ||
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define { <2 x i32>, <2 x i1> } @no_fold_splat_not_constant(<2 x i32>, <2 x i32>) { | ||
; CHECK-LABEL: @no_fold_splat_not_constant( | ||
; CHECK-NEXT: [[TMP3:%.*]] = add nsw <2 x i32> [[TMP0:%.*]], [[TMP1:%.*]] | ||
; CHECK-NEXT: [[TMP4:%.*]] = tail call { <2 x i32>, <2 x i1> } @llvm.sadd.with.overflow.v2i32(<2 x i32> [[TMP3]], <2 x i32> <i32 30, i32 30>) | ||
; CHECK-NEXT: ret { <2 x i32>, <2 x i1> } [[TMP4]] | ||
; | ||
%3 = add nsw <2 x i32> %0, %1 | ||
%4 = tail call { <2 x i32>, <2 x i1> } @llvm.sadd.with.overflow.v2i32(<2 x i32> %3, <2 x i32> <i32 30, i32 30>) | ||
ret { <2 x i32>, <2 x i1> } %4 | ||
} | ||
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define { i32, i1 } @fold_nuwnsw(i32) { | ||
; CHECK-LABEL: @fold_nuwnsw( | ||
; CHECK-NEXT: [[TMP2:%.*]] = add nuw nsw i32 [[TMP0:%.*]], 12 | ||
; CHECK-NEXT: [[TMP3:%.*]] = tail call { i32, i1 } @llvm.sadd.with.overflow.i32(i32 [[TMP2]], i32 30) | ||
; CHECK-NEXT: ret { i32, i1 } [[TMP3]] | ||
; | ||
%2 = add nuw nsw i32 %0, 12 | ||
%3 = tail call { i32, i1 } @llvm.sadd.with.overflow.i32(i32 %2, i32 30) | ||
ret { i32, i1 } %3 | ||
} | ||
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define { i32, i1 } @no_fold_nuw(i32) { | ||
; CHECK-LABEL: @no_fold_nuw( | ||
; CHECK-NEXT: [[TMP2:%.*]] = add nuw i32 [[TMP0:%.*]], 12 | ||
; CHECK-NEXT: [[TMP3:%.*]] = tail call { i32, i1 } @llvm.sadd.with.overflow.i32(i32 [[TMP2]], i32 30) | ||
; CHECK-NEXT: ret { i32, i1 } [[TMP3]] | ||
; | ||
%2 = add nuw i32 %0, 12 | ||
%3 = tail call { i32, i1 } @llvm.sadd.with.overflow.i32(i32 %2, i32 30) | ||
ret { i32, i1 } %3 | ||
} |