| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt < %s -instcombine -S | FileCheck %s |
| |
| define i1 @PR1817_1(i32 %X) { |
| ; CHECK-LABEL: @PR1817_1( |
| ; CHECK-NEXT: [[B:%.*]] = icmp ult i32 %X, 10 |
| ; CHECK-NEXT: ret i1 [[B]] |
| ; |
| %A = icmp slt i32 %X, 10 |
| %B = icmp ult i32 %X, 10 |
| %C = and i1 %A, %B |
| ret i1 %C |
| } |
| |
| define i1 @PR1817_2(i32 %X) { |
| ; CHECK-LABEL: @PR1817_2( |
| ; CHECK-NEXT: [[A:%.*]] = icmp slt i32 %X, 10 |
| ; CHECK-NEXT: ret i1 [[A]] |
| ; |
| %A = icmp slt i32 %X, 10 |
| %B = icmp ult i32 %X, 10 |
| %C = or i1 %A, %B |
| ret i1 %C |
| } |
| |
| define i1 @PR2330(i32 %a, i32 %b) { |
| ; CHECK-LABEL: @PR2330( |
| ; CHECK-NEXT: [[TMP1:%.*]] = or i32 %b, %a |
| ; CHECK-NEXT: [[TMP2:%.*]] = icmp ult i32 [[TMP1]], 8 |
| ; CHECK-NEXT: ret i1 [[TMP2]] |
| ; |
| %cmp1 = icmp ult i32 %a, 8 |
| %cmp2 = icmp ult i32 %b, 8 |
| %and = and i1 %cmp2, %cmp1 |
| ret i1 %and |
| } |
| |
| ; if LHSC and RHSC differ only by one bit: |
| ; (X == C1 || X == C2) -> (X | (C1 ^ C2)) == C2 |
| ; PR14708: https://bugs.llvm.org/show_bug.cgi?id=14708 |
| |
| define i1 @or_eq_with_one_bit_diff_constants1(i32 %x) { |
| ; CHECK-LABEL: @or_eq_with_one_bit_diff_constants1( |
| ; CHECK-NEXT: [[TMP1:%.*]] = or i32 %x, 1 |
| ; CHECK-NEXT: [[TMP2:%.*]] = icmp eq i32 [[TMP1]], 51 |
| ; CHECK-NEXT: ret i1 [[TMP2]] |
| ; |
| %cmp1 = icmp eq i32 %x, 50 |
| %cmp2 = icmp eq i32 %x, 51 |
| %or = or i1 %cmp1, %cmp2 |
| ret i1 %or |
| } |
| |
| ; (X != C1 && X != C2) -> (X | (C1 ^ C2)) != C2 |
| |
| define i1 @and_ne_with_one_bit_diff_constants1(i32 %x) { |
| ; CHECK-LABEL: @and_ne_with_one_bit_diff_constants1( |
| ; CHECK-NEXT: [[TMP1:%.*]] = or i32 %x, 1 |
| ; CHECK-NEXT: [[TMP2:%.*]] = icmp ne i32 [[TMP1]], 51 |
| ; CHECK-NEXT: ret i1 [[TMP2]] |
| ; |
| %cmp1 = icmp ne i32 %x, 51 |
| %cmp2 = icmp ne i32 %x, 50 |
| %and = and i1 %cmp1, %cmp2 |
| ret i1 %and |
| } |
| |
| ; The constants are not necessarily off-by-one, just off-by-one-bit. |
| |
| define i1 @or_eq_with_one_bit_diff_constants2(i32 %x) { |
| ; CHECK-LABEL: @or_eq_with_one_bit_diff_constants2( |
| ; CHECK-NEXT: [[TMP1:%.*]] = or i32 %x, 32 |
| ; CHECK-NEXT: [[TMP2:%.*]] = icmp eq i32 [[TMP1]], 97 |
| ; CHECK-NEXT: ret i1 [[TMP2]] |
| ; |
| %cmp1 = icmp eq i32 %x, 97 |
| %cmp2 = icmp eq i32 %x, 65 |
| %or = or i1 %cmp1, %cmp2 |
| ret i1 %or |
| } |
| |
| define i1 @and_ne_with_one_bit_diff_constants2(i19 %x) { |
| ; CHECK-LABEL: @and_ne_with_one_bit_diff_constants2( |
| ; CHECK-NEXT: [[TMP1:%.*]] = or i19 %x, 128 |
| ; CHECK-NEXT: [[TMP2:%.*]] = icmp ne i19 [[TMP1]], 193 |
| ; CHECK-NEXT: ret i1 [[TMP2]] |
| ; |
| %cmp1 = icmp ne i19 %x, 65 |
| %cmp2 = icmp ne i19 %x, 193 |
| %and = and i1 %cmp1, %cmp2 |
| ret i1 %and |
| } |
| |
| ; Make sure the constants are treated as unsigned when comparing them. |
| |
| define i1 @or_eq_with_one_bit_diff_constants3(i8 %x) { |
| ; CHECK-LABEL: @or_eq_with_one_bit_diff_constants3( |
| ; CHECK-NEXT: [[TMP1:%.*]] = or i8 %x, -128 |
| ; CHECK-NEXT: [[TMP2:%.*]] = icmp eq i8 [[TMP1]], -2 |
| ; CHECK-NEXT: ret i1 [[TMP2]] |
| ; |
| %cmp1 = icmp eq i8 %x, 254 |
| %cmp2 = icmp eq i8 %x, 126 |
| %or = or i1 %cmp1, %cmp2 |
| ret i1 %or |
| } |
| |
| define i1 @and_ne_with_one_bit_diff_constants3(i8 %x) { |
| ; CHECK-LABEL: @and_ne_with_one_bit_diff_constants3( |
| ; CHECK-NEXT: [[TMP1:%.*]] = or i8 %x, -128 |
| ; CHECK-NEXT: [[TMP2:%.*]] = icmp ne i8 [[TMP1]], -63 |
| ; CHECK-NEXT: ret i1 [[TMP2]] |
| ; |
| %cmp1 = icmp ne i8 %x, 65 |
| %cmp2 = icmp ne i8 %x, 193 |
| %and = and i1 %cmp1, %cmp2 |
| ret i1 %and |
| } |
| |
| ; Use an 'add' to eliminate an icmp if the constants are off-by-one (not off-by-one-bit). |
| ; (X == 13 | X == 14) -> X-13 <u 2 |
| |
| define i1 @or_eq_with_diff_one(i8 %x) { |
| ; CHECK-LABEL: @or_eq_with_diff_one( |
| ; CHECK-NEXT: [[TMP1:%.*]] = add i8 %x, -13 |
| ; CHECK-NEXT: [[TMP2:%.*]] = icmp ult i8 [[TMP1]], 2 |
| ; CHECK-NEXT: ret i1 [[TMP2]] |
| ; |
| %cmp1 = icmp eq i8 %x, 13 |
| %cmp2 = icmp eq i8 %x, 14 |
| %or = or i1 %cmp1, %cmp2 |
| ret i1 %or |
| } |
| |
| ; (X != 40 | X != 39) -> X-39 >u 1 |
| |
| define i1 @and_ne_with_diff_one(i32 %x) { |
| ; CHECK-LABEL: @and_ne_with_diff_one( |
| ; CHECK-NEXT: [[TMP1:%.*]] = add i32 %x, -39 |
| ; CHECK-NEXT: [[TMP2:%.*]] = icmp ugt i32 [[TMP1]], 1 |
| ; CHECK-NEXT: ret i1 [[TMP2]] |
| ; |
| %cmp1 = icmp ne i32 %x, 40 |
| %cmp2 = icmp ne i32 %x, 39 |
| %and = and i1 %cmp1, %cmp2 |
| ret i1 %and |
| } |
| |
| ; Make sure the constants are treated as signed when comparing them. |
| ; PR32524: https://bugs.llvm.org/show_bug.cgi?id=32524 |
| |
| define i1 @or_eq_with_diff_one_signed(i32 %x) { |
| ; CHECK-LABEL: @or_eq_with_diff_one_signed( |
| ; CHECK-NEXT: [[TMP1:%.*]] = add i32 %x, 1 |
| ; CHECK-NEXT: [[TMP2:%.*]] = icmp ult i32 [[TMP1]], 2 |
| ; CHECK-NEXT: ret i1 [[TMP2]] |
| ; |
| %cmp1 = icmp eq i32 %x, 0 |
| %cmp2 = icmp eq i32 %x, -1 |
| %or = or i1 %cmp1, %cmp2 |
| ret i1 %or |
| } |
| |
| define i1 @and_ne_with_diff_one_signed(i64 %x) { |
| ; CHECK-LABEL: @and_ne_with_diff_one_signed( |
| ; CHECK-NEXT: [[TMP1:%.*]] = add i64 %x, 1 |
| ; CHECK-NEXT: [[TMP2:%.*]] = icmp ugt i64 [[TMP1]], 1 |
| ; CHECK-NEXT: ret i1 [[TMP2]] |
| ; |
| %cmp1 = icmp ne i64 %x, -1 |
| %cmp2 = icmp ne i64 %x, 0 |
| %and = and i1 %cmp1, %cmp2 |
| ret i1 %and |
| } |
| |
| ; Vectors with splat constants get the same folds. |
| |
| define <2 x i1> @or_eq_with_one_bit_diff_constants2_splatvec(<2 x i32> %x) { |
| ; CHECK-LABEL: @or_eq_with_one_bit_diff_constants2_splatvec( |
| ; CHECK-NEXT: [[TMP1:%.*]] = or <2 x i32> %x, <i32 32, i32 32> |
| ; CHECK-NEXT: [[TMP2:%.*]] = icmp eq <2 x i32> [[TMP1]], <i32 97, i32 97> |
| ; CHECK-NEXT: ret <2 x i1> [[TMP2]] |
| ; |
| %cmp1 = icmp eq <2 x i32> %x, <i32 97, i32 97> |
| %cmp2 = icmp eq <2 x i32> %x, <i32 65, i32 65> |
| %or = or <2 x i1> %cmp1, %cmp2 |
| ret <2 x i1> %or |
| } |
| |
| define <2 x i1> @and_ne_with_diff_one_splatvec(<2 x i32> %x) { |
| ; CHECK-LABEL: @and_ne_with_diff_one_splatvec( |
| ; CHECK-NEXT: [[TMP1:%.*]] = add <2 x i32> %x, <i32 -39, i32 -39> |
| ; CHECK-NEXT: [[TMP2:%.*]] = icmp ugt <2 x i32> [[TMP1]], <i32 1, i32 1> |
| ; CHECK-NEXT: ret <2 x i1> [[TMP2]] |
| ; |
| %cmp1 = icmp ne <2 x i32> %x, <i32 40, i32 40> |
| %cmp2 = icmp ne <2 x i32> %x, <i32 39, i32 39> |
| %and = and <2 x i1> %cmp1, %cmp2 |
| ret <2 x i1> %and |
| } |
| |
| ; This is a fuzzer-generated test that would assert because |
| ; we'd get into foldAndOfICmps() without running InstSimplify |
| ; on an 'and' that should have been killed. It's not obvious |
| ; why, but removing anything hides the bug, hence the long test. |
| |
| define void @simplify_before_foldAndOfICmps() { |
| ; CHECK-LABEL: @simplify_before_foldAndOfICmps( |
| ; CHECK-NEXT: [[A8:%.*]] = alloca i16, align 2 |
| ; CHECK-NEXT: [[L7:%.*]] = load i16, i16* [[A8]], align 2 |
| ; CHECK-NEXT: [[C10:%.*]] = icmp ult i16 [[L7]], 2 |
| ; CHECK-NEXT: [[C7:%.*]] = icmp slt i16 [[L7]], 0 |
| ; CHECK-NEXT: [[C18:%.*]] = or i1 [[C7]], [[C10]] |
| ; CHECK-NEXT: [[L7_LOBIT:%.*]] = ashr i16 [[L7]], 15 |
| ; CHECK-NEXT: [[TMP1:%.*]] = sext i16 [[L7_LOBIT]] to i64 |
| ; CHECK-NEXT: [[G26:%.*]] = getelementptr i1, i1* null, i64 [[TMP1]] |
| ; CHECK-NEXT: store i16 [[L7]], i16* undef, align 2 |
| ; CHECK-NEXT: store i1 [[C18]], i1* undef, align 1 |
| ; CHECK-NEXT: store i1* [[G26]], i1** undef, align 8 |
| ; CHECK-NEXT: ret void |
| ; |
| %A8 = alloca i16 |
| %L7 = load i16, i16* %A8 |
| %G21 = getelementptr i16, i16* %A8, i8 -1 |
| %B11 = udiv i16 %L7, -1 |
| %G4 = getelementptr i16, i16* %A8, i16 %B11 |
| %L2 = load i16, i16* %G4 |
| %L = load i16, i16* %G4 |
| %B23 = mul i16 %B11, %B11 |
| %L4 = load i16, i16* %A8 |
| %B21 = sdiv i16 %L7, %L4 |
| %B7 = sub i16 0, %B21 |
| %B18 = mul i16 %B23, %B7 |
| %C10 = icmp ugt i16 %L, %B11 |
| %B20 = and i16 %L7, %L2 |
| %B1 = mul i1 %C10, true |
| %C5 = icmp sle i16 %B21, %L |
| %C11 = icmp ule i16 %B21, %L |
| %C7 = icmp slt i16 %B20, 0 |
| %B29 = srem i16 %L4, %B18 |
| %B15 = add i1 %C7, %C10 |
| %B19 = add i1 %C11, %B15 |
| %C6 = icmp sge i1 %C11, %B19 |
| %B33 = or i16 %B29, %L4 |
| %C13 = icmp uge i1 %C5, %B1 |
| %C3 = icmp ult i1 %C13, %C6 |
| store i16 undef, i16* %G21 |
| %C18 = icmp ule i1 %C10, %C7 |
| %G26 = getelementptr i1, i1* null, i1 %C3 |
| store i16 %B33, i16* undef |
| store i1 %C18, i1* undef |
| store i1* %G26, i1** undef |
| ret void |
| } |
| |