| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt < %s -instcombine -S | FileCheck %s |
| |
| declare void @use8(i8) |
| |
| declare void @use1(i1) |
| declare void @llvm.assume(i1) |
| |
| define i1 @t0(i8 %base, i8 %offset) { |
| ; CHECK-LABEL: @t0( |
| ; CHECK-NEXT: [[ADJUSTED:%.*]] = add i8 [[BASE:%.*]], [[OFFSET:%.*]] |
| ; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]]) |
| ; CHECK-NEXT: [[TMP1:%.*]] = sub i8 0, [[OFFSET]] |
| ; CHECK-NEXT: [[TMP2:%.*]] = icmp ult i8 [[TMP1]], [[BASE]] |
| ; CHECK-NEXT: ret i1 [[TMP2]] |
| ; |
| %adjusted = add i8 %base, %offset |
| call void @use8(i8 %adjusted) |
| %not_null = icmp ne i8 %adjusted, 0 |
| %no_underflow = icmp ule i8 %adjusted, %base |
| %r = and i1 %not_null, %no_underflow |
| ret i1 %r |
| } |
| |
| define i1 @t0_logical(i8 %base, i8 %offset) { |
| ; CHECK-LABEL: @t0_logical( |
| ; CHECK-NEXT: [[ADJUSTED:%.*]] = add i8 [[BASE:%.*]], [[OFFSET:%.*]] |
| ; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]]) |
| ; CHECK-NEXT: [[TMP1:%.*]] = sub i8 0, [[OFFSET]] |
| ; CHECK-NEXT: [[TMP2:%.*]] = icmp ult i8 [[TMP1]], [[BASE]] |
| ; CHECK-NEXT: ret i1 [[TMP2]] |
| ; |
| %adjusted = add i8 %base, %offset |
| call void @use8(i8 %adjusted) |
| %not_null = icmp ne i8 %adjusted, 0 |
| %no_underflow = icmp ule i8 %adjusted, %base |
| %r = select i1 %not_null, i1 %no_underflow, i1 false |
| ret i1 %r |
| } |
| |
| ; We need to produce extra instruction, so one of icmp's must go away. |
| define i1 @t1_oneuse0(i8 %base, i8 %offset) { |
| ; CHECK-LABEL: @t1_oneuse0( |
| ; CHECK-NEXT: [[ADJUSTED:%.*]] = add i8 [[BASE:%.*]], [[OFFSET:%.*]] |
| ; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]]) |
| ; CHECK-NEXT: [[NOT_NULL:%.*]] = icmp ne i8 [[ADJUSTED]], 0 |
| ; CHECK-NEXT: call void @use1(i1 [[NOT_NULL]]) |
| ; CHECK-NEXT: [[TMP1:%.*]] = sub i8 0, [[OFFSET]] |
| ; CHECK-NEXT: [[TMP2:%.*]] = icmp ult i8 [[TMP1]], [[BASE]] |
| ; CHECK-NEXT: ret i1 [[TMP2]] |
| ; |
| %adjusted = add i8 %base, %offset |
| call void @use8(i8 %adjusted) |
| %not_null = icmp ne i8 %adjusted, 0 |
| call void @use1(i1 %not_null) |
| %no_underflow = icmp ule i8 %adjusted, %base |
| %r = and i1 %not_null, %no_underflow |
| ret i1 %r |
| } |
| |
| define i1 @t1_oneuse0_logical(i8 %base, i8 %offset) { |
| ; CHECK-LABEL: @t1_oneuse0_logical( |
| ; CHECK-NEXT: [[ADJUSTED:%.*]] = add i8 [[BASE:%.*]], [[OFFSET:%.*]] |
| ; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]]) |
| ; CHECK-NEXT: [[NOT_NULL:%.*]] = icmp ne i8 [[ADJUSTED]], 0 |
| ; CHECK-NEXT: call void @use1(i1 [[NOT_NULL]]) |
| ; CHECK-NEXT: [[TMP1:%.*]] = sub i8 0, [[OFFSET]] |
| ; CHECK-NEXT: [[TMP2:%.*]] = icmp ult i8 [[TMP1]], [[BASE]] |
| ; CHECK-NEXT: ret i1 [[TMP2]] |
| ; |
| %adjusted = add i8 %base, %offset |
| call void @use8(i8 %adjusted) |
| %not_null = icmp ne i8 %adjusted, 0 |
| call void @use1(i1 %not_null) |
| %no_underflow = icmp ule i8 %adjusted, %base |
| %r = select i1 %not_null, i1 %no_underflow, i1 false |
| ret i1 %r |
| } |
| define i1 @t2_oneuse1(i8 %base, i8 %offset) { |
| ; CHECK-LABEL: @t2_oneuse1( |
| ; CHECK-NEXT: [[ADJUSTED:%.*]] = add i8 [[BASE:%.*]], [[OFFSET:%.*]] |
| ; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]]) |
| ; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = icmp ule i8 [[ADJUSTED]], [[BASE]] |
| ; CHECK-NEXT: call void @use1(i1 [[NO_UNDERFLOW]]) |
| ; CHECK-NEXT: [[TMP1:%.*]] = sub i8 0, [[OFFSET]] |
| ; CHECK-NEXT: [[TMP2:%.*]] = icmp ult i8 [[TMP1]], [[BASE]] |
| ; CHECK-NEXT: ret i1 [[TMP2]] |
| ; |
| %adjusted = add i8 %base, %offset |
| call void @use8(i8 %adjusted) |
| %not_null = icmp ne i8 %adjusted, 0 |
| %no_underflow = icmp ule i8 %adjusted, %base |
| call void @use1(i1 %no_underflow) |
| %r = and i1 %not_null, %no_underflow |
| ret i1 %r |
| } |
| |
| define i1 @t2_oneuse1_logical(i8 %base, i8 %offset) { |
| ; CHECK-LABEL: @t2_oneuse1_logical( |
| ; CHECK-NEXT: [[ADJUSTED:%.*]] = add i8 [[BASE:%.*]], [[OFFSET:%.*]] |
| ; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]]) |
| ; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = icmp ule i8 [[ADJUSTED]], [[BASE]] |
| ; CHECK-NEXT: call void @use1(i1 [[NO_UNDERFLOW]]) |
| ; CHECK-NEXT: [[TMP1:%.*]] = sub i8 0, [[OFFSET]] |
| ; CHECK-NEXT: [[TMP2:%.*]] = icmp ult i8 [[TMP1]], [[BASE]] |
| ; CHECK-NEXT: ret i1 [[TMP2]] |
| ; |
| %adjusted = add i8 %base, %offset |
| call void @use8(i8 %adjusted) |
| %not_null = icmp ne i8 %adjusted, 0 |
| %no_underflow = icmp ule i8 %adjusted, %base |
| call void @use1(i1 %no_underflow) |
| %r = select i1 %not_null, i1 %no_underflow, i1 false |
| ret i1 %r |
| } |
| define i1 @n3_oneuse2_bad(i8 %base, i8 %offset) { |
| ; CHECK-LABEL: @n3_oneuse2_bad( |
| ; CHECK-NEXT: [[ADJUSTED:%.*]] = add i8 [[BASE:%.*]], [[OFFSET:%.*]] |
| ; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]]) |
| ; CHECK-NEXT: [[NOT_NULL:%.*]] = icmp ne i8 [[ADJUSTED]], 0 |
| ; CHECK-NEXT: call void @use1(i1 [[NOT_NULL]]) |
| ; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = icmp ule i8 [[ADJUSTED]], [[BASE]] |
| ; CHECK-NEXT: call void @use1(i1 [[NO_UNDERFLOW]]) |
| ; CHECK-NEXT: [[R:%.*]] = and i1 [[NOT_NULL]], [[NO_UNDERFLOW]] |
| ; CHECK-NEXT: ret i1 [[R]] |
| ; |
| %adjusted = add i8 %base, %offset |
| call void @use8(i8 %adjusted) |
| %not_null = icmp ne i8 %adjusted, 0 |
| call void @use1(i1 %not_null) |
| %no_underflow = icmp ule i8 %adjusted, %base |
| call void @use1(i1 %no_underflow) |
| %r = and i1 %not_null, %no_underflow |
| ret i1 %r |
| } |
| |
| define i1 @n3_oneuse2_bad_logical(i8 %base, i8 %offset) { |
| ; CHECK-LABEL: @n3_oneuse2_bad_logical( |
| ; CHECK-NEXT: [[ADJUSTED:%.*]] = add i8 [[BASE:%.*]], [[OFFSET:%.*]] |
| ; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]]) |
| ; CHECK-NEXT: [[NOT_NULL:%.*]] = icmp ne i8 [[ADJUSTED]], 0 |
| ; CHECK-NEXT: call void @use1(i1 [[NOT_NULL]]) |
| ; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = icmp ule i8 [[ADJUSTED]], [[BASE]] |
| ; CHECK-NEXT: call void @use1(i1 [[NO_UNDERFLOW]]) |
| ; CHECK-NEXT: [[R:%.*]] = and i1 [[NOT_NULL]], [[NO_UNDERFLOW]] |
| ; CHECK-NEXT: ret i1 [[R]] |
| ; |
| %adjusted = add i8 %base, %offset |
| call void @use8(i8 %adjusted) |
| %not_null = icmp ne i8 %adjusted, 0 |
| call void @use1(i1 %not_null) |
| %no_underflow = icmp ule i8 %adjusted, %base |
| call void @use1(i1 %no_underflow) |
| %r = select i1 %not_null, i1 %no_underflow, i1 false |
| ret i1 %r |
| } |
| |
| define i1 @t4_commutativity0(i8 %base, i8 %offset) { |
| ; CHECK-LABEL: @t4_commutativity0( |
| ; CHECK-NEXT: [[ADJUSTED:%.*]] = add i8 [[BASE:%.*]], [[OFFSET:%.*]] |
| ; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]]) |
| ; CHECK-NEXT: [[TMP1:%.*]] = sub i8 0, [[OFFSET]] |
| ; CHECK-NEXT: [[TMP2:%.*]] = icmp ult i8 [[TMP1]], [[BASE]] |
| ; CHECK-NEXT: ret i1 [[TMP2]] |
| ; |
| %adjusted = add i8 %base, %offset |
| call void @use8(i8 %adjusted) |
| %not_null = icmp ne i8 %adjusted, 0 |
| %no_underflow = icmp ule i8 %adjusted, %base |
| %r = and i1 %no_underflow, %not_null ; swapped |
| ret i1 %r |
| } |
| |
| define i1 @t4_commutativity0_logical(i8 %base, i8 %offset) { |
| ; CHECK-LABEL: @t4_commutativity0_logical( |
| ; CHECK-NEXT: [[ADJUSTED:%.*]] = add i8 [[BASE:%.*]], [[OFFSET:%.*]] |
| ; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]]) |
| ; CHECK-NEXT: [[TMP1:%.*]] = sub i8 0, [[OFFSET]] |
| ; CHECK-NEXT: [[TMP2:%.*]] = icmp ult i8 [[TMP1]], [[BASE]] |
| ; CHECK-NEXT: ret i1 [[TMP2]] |
| ; |
| %adjusted = add i8 %base, %offset |
| call void @use8(i8 %adjusted) |
| %not_null = icmp ne i8 %adjusted, 0 |
| %no_underflow = icmp ule i8 %adjusted, %base |
| %r = select i1 %no_underflow, i1 %not_null, i1 false ; swapped |
| ret i1 %r |
| } |
| define i1 @t5_commutativity1(i8 %base, i8 %offset) { |
| ; CHECK-LABEL: @t5_commutativity1( |
| ; CHECK-NEXT: [[ADJUSTED:%.*]] = add i8 [[BASE:%.*]], [[OFFSET:%.*]] |
| ; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]]) |
| ; CHECK-NEXT: [[TMP1:%.*]] = sub i8 0, [[OFFSET]] |
| ; CHECK-NEXT: [[TMP2:%.*]] = icmp ult i8 [[TMP1]], [[BASE]] |
| ; CHECK-NEXT: ret i1 [[TMP2]] |
| ; |
| %adjusted = add i8 %base, %offset |
| call void @use8(i8 %adjusted) |
| %not_null = icmp ne i8 %adjusted, 0 |
| %no_underflow = icmp uge i8 %base, %adjusted ; swapped |
| %r = and i1 %not_null, %no_underflow |
| ret i1 %r |
| } |
| |
| define i1 @t5_commutativity1_logical(i8 %base, i8 %offset) { |
| ; CHECK-LABEL: @t5_commutativity1_logical( |
| ; CHECK-NEXT: [[ADJUSTED:%.*]] = add i8 [[BASE:%.*]], [[OFFSET:%.*]] |
| ; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]]) |
| ; CHECK-NEXT: [[TMP1:%.*]] = sub i8 0, [[OFFSET]] |
| ; CHECK-NEXT: [[TMP2:%.*]] = icmp ult i8 [[TMP1]], [[BASE]] |
| ; CHECK-NEXT: ret i1 [[TMP2]] |
| ; |
| %adjusted = add i8 %base, %offset |
| call void @use8(i8 %adjusted) |
| %not_null = icmp ne i8 %adjusted, 0 |
| %no_underflow = icmp uge i8 %base, %adjusted ; swapped |
| %r = select i1 %not_null, i1 %no_underflow, i1 false |
| ret i1 %r |
| } |
| define i1 @t6_commutativity3(i8 %base, i8 %offset) { |
| ; CHECK-LABEL: @t6_commutativity3( |
| ; CHECK-NEXT: [[ADJUSTED:%.*]] = add i8 [[BASE:%.*]], [[OFFSET:%.*]] |
| ; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]]) |
| ; CHECK-NEXT: [[TMP1:%.*]] = sub i8 0, [[OFFSET]] |
| ; CHECK-NEXT: [[TMP2:%.*]] = icmp ult i8 [[TMP1]], [[BASE]] |
| ; CHECK-NEXT: ret i1 [[TMP2]] |
| ; |
| %adjusted = add i8 %base, %offset |
| call void @use8(i8 %adjusted) |
| %not_null = icmp ne i8 %adjusted, 0 |
| %no_underflow = icmp uge i8 %base, %adjusted ; swapped |
| %r = and i1 %no_underflow, %not_null ; swapped |
| ret i1 %r |
| } |
| |
| define i1 @t6_commutativity3_logical(i8 %base, i8 %offset) { |
| ; CHECK-LABEL: @t6_commutativity3_logical( |
| ; CHECK-NEXT: [[ADJUSTED:%.*]] = add i8 [[BASE:%.*]], [[OFFSET:%.*]] |
| ; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]]) |
| ; CHECK-NEXT: [[TMP1:%.*]] = sub i8 0, [[OFFSET]] |
| ; CHECK-NEXT: [[TMP2:%.*]] = icmp ult i8 [[TMP1]], [[BASE]] |
| ; CHECK-NEXT: ret i1 [[TMP2]] |
| ; |
| %adjusted = add i8 %base, %offset |
| call void @use8(i8 %adjusted) |
| %not_null = icmp ne i8 %adjusted, 0 |
| %no_underflow = icmp uge i8 %base, %adjusted ; swapped |
| %r = select i1 %no_underflow, i1 %not_null, i1 false ; swapped |
| ret i1 %r |
| } |
| |
| ; We could have the opposite question, did we get null or overflow happened? |
| define i1 @t7(i8 %base, i8 %offset) { |
| ; CHECK-LABEL: @t7( |
| ; CHECK-NEXT: [[ADJUSTED:%.*]] = add i8 [[BASE:%.*]], [[OFFSET:%.*]] |
| ; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]]) |
| ; CHECK-NEXT: [[TMP1:%.*]] = add i8 [[ADJUSTED]], -1 |
| ; CHECK-NEXT: [[TMP2:%.*]] = icmp uge i8 [[TMP1]], [[BASE]] |
| ; CHECK-NEXT: ret i1 [[TMP2]] |
| ; |
| %adjusted = add i8 %base, %offset |
| call void @use8(i8 %adjusted) |
| %not_null = icmp eq i8 %adjusted, 0 |
| %no_underflow = icmp ugt i8 %adjusted, %base |
| %r = or i1 %not_null, %no_underflow |
| ret i1 %r |
| } |
| |
| define i1 @t7_logical(i8 %base, i8 %offset) { |
| ; CHECK-LABEL: @t7_logical( |
| ; CHECK-NEXT: [[ADJUSTED:%.*]] = add i8 [[BASE:%.*]], [[OFFSET:%.*]] |
| ; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]]) |
| ; CHECK-NEXT: [[TMP1:%.*]] = add i8 [[ADJUSTED]], -1 |
| ; CHECK-NEXT: [[TMP2:%.*]] = icmp uge i8 [[TMP1]], [[BASE]] |
| ; CHECK-NEXT: ret i1 [[TMP2]] |
| ; |
| %adjusted = add i8 %base, %offset |
| call void @use8(i8 %adjusted) |
| %not_null = icmp eq i8 %adjusted, 0 |
| %no_underflow = icmp ugt i8 %adjusted, %base |
| %r = select i1 %not_null, i1 true, i1 %no_underflow |
| ret i1 %r |
| } |
| |
| ; The comparison can be with any of the values being added. |
| define i1 @t8(i8 %base, i8 %offset) { |
| ; CHECK-LABEL: @t8( |
| ; CHECK-NEXT: [[ADJUSTED:%.*]] = add i8 [[BASE:%.*]], [[OFFSET:%.*]] |
| ; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]]) |
| ; CHECK-NEXT: [[TMP1:%.*]] = sub i8 0, [[BASE]] |
| ; CHECK-NEXT: [[TMP2:%.*]] = icmp ult i8 [[TMP1]], [[OFFSET]] |
| ; CHECK-NEXT: ret i1 [[TMP2]] |
| ; |
| %adjusted = add i8 %base, %offset |
| call void @use8(i8 %adjusted) |
| %not_null = icmp ne i8 %adjusted, 0 |
| %no_underflow = icmp ule i8 %adjusted, %offset |
| %r = and i1 %not_null, %no_underflow |
| ret i1 %r |
| } |
| |
| define i1 @t8_logical(i8 %base, i8 %offset) { |
| ; CHECK-LABEL: @t8_logical( |
| ; CHECK-NEXT: [[ADJUSTED:%.*]] = add i8 [[BASE:%.*]], [[OFFSET:%.*]] |
| ; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]]) |
| ; CHECK-NEXT: [[TMP1:%.*]] = sub i8 0, [[BASE]] |
| ; CHECK-NEXT: [[TMP2:%.*]] = icmp ult i8 [[TMP1]], [[OFFSET]] |
| ; CHECK-NEXT: ret i1 [[TMP2]] |
| ; |
| %adjusted = add i8 %base, %offset |
| call void @use8(i8 %adjusted) |
| %not_null = icmp ne i8 %adjusted, 0 |
| %no_underflow = icmp ule i8 %adjusted, %offset |
| %r = select i1 %not_null, i1 %no_underflow, i1 false |
| ret i1 %r |
| } |