| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt < %s -passes=instcombine -S | FileCheck %s |
| |
| ; Here we subtract two values, check that subtraction did not overflow AND |
| ; that the result is non-zero. This can be simplified just to a comparison |
| ; between the base and offset. |
| |
| declare void @use8(i8) |
| declare void @use64(i64) |
| declare void @use1(i1) |
| |
| declare {i8, i1} @llvm.usub.with.overflow(i8, i8) |
| declare void @useagg({i8, i1}) |
| |
| declare void @llvm.assume(i1) |
| |
| ; There is a number of base patterns.. |
| |
| define i1 @t0_noncanonical_ignoreme(i8 %base, i8 %offset) { |
| ; CHECK-LABEL: @t0_noncanonical_ignoreme( |
| ; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i8 [[BASE:%.*]], [[OFFSET:%.*]] |
| ; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]]) |
| ; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = icmp ule i8 [[OFFSET]], [[BASE]] |
| ; CHECK-NEXT: call void @use1(i1 [[NO_UNDERFLOW]]) |
| ; CHECK-NEXT: [[NOT_NULL:%.*]] = icmp ne i8 [[BASE]], [[OFFSET]] |
| ; CHECK-NEXT: call void @use1(i1 [[NOT_NULL]]) |
| ; CHECK-NEXT: [[R:%.*]] = icmp ult i8 [[OFFSET]], [[BASE]] |
| ; CHECK-NEXT: ret i1 [[R]] |
| ; |
| %adjusted = sub i8 %base, %offset |
| call void @use8(i8 %adjusted) |
| %no_underflow = icmp ule i8 %adjusted, %base |
| call void @use1(i1 %no_underflow) |
| %not_null = icmp ne i8 %adjusted, 0 |
| call void @use1(i1 %not_null) |
| %r = and i1 %not_null, %no_underflow |
| ret i1 %r |
| } |
| |
| define i1 @t0_noncanonical_ignoreme_logical(i8 %base, i8 %offset) { |
| ; CHECK-LABEL: @t0_noncanonical_ignoreme_logical( |
| ; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i8 [[BASE:%.*]], [[OFFSET:%.*]] |
| ; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]]) |
| ; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = icmp ule i8 [[OFFSET]], [[BASE]] |
| ; CHECK-NEXT: call void @use1(i1 [[NO_UNDERFLOW]]) |
| ; CHECK-NEXT: [[NOT_NULL:%.*]] = icmp ne i8 [[BASE]], [[OFFSET]] |
| ; CHECK-NEXT: call void @use1(i1 [[NOT_NULL]]) |
| ; CHECK-NEXT: [[R:%.*]] = icmp ult i8 [[OFFSET]], [[BASE]] |
| ; CHECK-NEXT: ret i1 [[R]] |
| ; |
| %adjusted = sub i8 %base, %offset |
| call void @use8(i8 %adjusted) |
| %no_underflow = icmp ule i8 %adjusted, %base |
| call void @use1(i1 %no_underflow) |
| %not_null = icmp ne i8 %adjusted, 0 |
| call void @use1(i1 %not_null) |
| %r = select i1 %not_null, i1 %no_underflow, i1 false |
| ret i1 %r |
| } |
| |
| define i1 @t1(i8 %base, i8 %offset) { |
| ; CHECK-LABEL: @t1( |
| ; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i8 [[BASE:%.*]], [[OFFSET:%.*]] |
| ; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]]) |
| ; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = icmp uge i8 [[BASE]], [[OFFSET]] |
| ; CHECK-NEXT: call void @use1(i1 [[NO_UNDERFLOW]]) |
| ; CHECK-NEXT: [[NOT_NULL:%.*]] = icmp ne i8 [[BASE]], [[OFFSET]] |
| ; CHECK-NEXT: call void @use1(i1 [[NOT_NULL]]) |
| ; CHECK-NEXT: [[R:%.*]] = icmp ugt i8 [[BASE]], [[OFFSET]] |
| ; CHECK-NEXT: ret i1 [[R]] |
| ; |
| %adjusted = sub i8 %base, %offset |
| call void @use8(i8 %adjusted) |
| %no_underflow = icmp uge i8 %base, %offset |
| call void @use1(i1 %no_underflow) |
| %not_null = icmp ne i8 %adjusted, 0 |
| call void @use1(i1 %not_null) |
| %r = and i1 %not_null, %no_underflow |
| ret i1 %r |
| } |
| |
| define i1 @t1_logical(i8 %base, i8 %offset) { |
| ; CHECK-LABEL: @t1_logical( |
| ; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i8 [[BASE:%.*]], [[OFFSET:%.*]] |
| ; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]]) |
| ; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = icmp uge i8 [[BASE]], [[OFFSET]] |
| ; CHECK-NEXT: call void @use1(i1 [[NO_UNDERFLOW]]) |
| ; CHECK-NEXT: [[NOT_NULL:%.*]] = icmp ne i8 [[BASE]], [[OFFSET]] |
| ; CHECK-NEXT: call void @use1(i1 [[NOT_NULL]]) |
| ; CHECK-NEXT: [[R:%.*]] = icmp ugt i8 [[BASE]], [[OFFSET]] |
| ; CHECK-NEXT: ret i1 [[R]] |
| ; |
| %adjusted = sub i8 %base, %offset |
| call void @use8(i8 %adjusted) |
| %no_underflow = icmp uge i8 %base, %offset |
| call void @use1(i1 %no_underflow) |
| %not_null = icmp ne i8 %adjusted, 0 |
| call void @use1(i1 %not_null) |
| %r = select i1 %not_null, i1 %no_underflow, i1 false |
| ret i1 %r |
| } |
| define i1 @t1_strict(i8 %base, i8 %offset) { |
| ; CHECK-LABEL: @t1_strict( |
| ; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i8 [[BASE:%.*]], [[OFFSET:%.*]] |
| ; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]]) |
| ; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = icmp ugt i8 [[BASE]], [[OFFSET]] |
| ; CHECK-NEXT: call void @use1(i1 [[NO_UNDERFLOW]]) |
| ; CHECK-NEXT: [[NOT_NULL:%.*]] = icmp ne i8 [[BASE]], [[OFFSET]] |
| ; CHECK-NEXT: call void @use1(i1 [[NOT_NULL]]) |
| ; CHECK-NEXT: ret i1 [[NO_UNDERFLOW]] |
| ; |
| %adjusted = sub i8 %base, %offset |
| call void @use8(i8 %adjusted) |
| %no_underflow = icmp ugt i8 %base, %offset ; same is valid for strict predicate |
| call void @use1(i1 %no_underflow) |
| %not_null = icmp ne i8 %adjusted, 0 |
| call void @use1(i1 %not_null) |
| %r = and i1 %not_null, %no_underflow |
| ret i1 %r |
| } |
| |
| define i1 @t1_strict_logical(i8 %base, i8 %offset) { |
| ; CHECK-LABEL: @t1_strict_logical( |
| ; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i8 [[BASE:%.*]], [[OFFSET:%.*]] |
| ; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]]) |
| ; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = icmp ugt i8 [[BASE]], [[OFFSET]] |
| ; CHECK-NEXT: call void @use1(i1 [[NO_UNDERFLOW]]) |
| ; CHECK-NEXT: [[NOT_NULL:%.*]] = icmp ne i8 [[BASE]], [[OFFSET]] |
| ; CHECK-NEXT: call void @use1(i1 [[NOT_NULL]]) |
| ; CHECK-NEXT: ret i1 [[NO_UNDERFLOW]] |
| ; |
| %adjusted = sub i8 %base, %offset |
| call void @use8(i8 %adjusted) |
| %no_underflow = icmp ugt i8 %base, %offset ; same is valid for strict predicate |
| call void @use1(i1 %no_underflow) |
| %not_null = icmp ne i8 %adjusted, 0 |
| call void @use1(i1 %not_null) |
| %r = select i1 %not_null, i1 %no_underflow, i1 false |
| ret i1 %r |
| } |
| |
| define i1 @t2(i8 %base, i8 %offset) { |
| ; CHECK-LABEL: @t2( |
| ; CHECK-NEXT: [[AGG:%.*]] = call { i8, i1 } @llvm.usub.with.overflow.i8(i8 [[BASE:%.*]], i8 [[OFFSET:%.*]]) |
| ; CHECK-NEXT: call void @useagg({ i8, i1 } [[AGG]]) |
| ; CHECK-NEXT: [[ADJUSTED:%.*]] = extractvalue { i8, i1 } [[AGG]], 0 |
| ; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]]) |
| ; CHECK-NEXT: [[UNDERFLOW:%.*]] = extractvalue { i8, i1 } [[AGG]], 1 |
| ; CHECK-NEXT: call void @use1(i1 [[UNDERFLOW]]) |
| ; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = xor i1 [[UNDERFLOW]], true |
| ; CHECK-NEXT: call void @use1(i1 [[NO_UNDERFLOW]]) |
| ; CHECK-NEXT: [[NOT_NULL:%.*]] = icmp ne i8 [[ADJUSTED]], 0 |
| ; CHECK-NEXT: [[R:%.*]] = and i1 [[NOT_NULL]], [[NO_UNDERFLOW]] |
| ; CHECK-NEXT: ret i1 [[R]] |
| ; |
| %agg = call {i8, i1} @llvm.usub.with.overflow(i8 %base, i8 %offset) |
| call void @useagg({i8, i1} %agg) |
| %adjusted = extractvalue {i8, i1} %agg, 0 |
| call void @use8(i8 %adjusted) |
| %underflow = extractvalue {i8, i1} %agg, 1 |
| call void @use1(i1 %underflow) |
| %no_underflow = xor i1 %underflow, -1 |
| call void @use1(i1 %no_underflow) |
| %not_null = icmp ne i8 %adjusted, 0 |
| %r = and i1 %not_null, %no_underflow |
| ret i1 %r |
| } |
| |
| define i1 @t2_logical(i8 %base, i8 %offset) { |
| ; CHECK-LABEL: @t2_logical( |
| ; CHECK-NEXT: [[AGG:%.*]] = call { i8, i1 } @llvm.usub.with.overflow.i8(i8 [[BASE:%.*]], i8 [[OFFSET:%.*]]) |
| ; CHECK-NEXT: call void @useagg({ i8, i1 } [[AGG]]) |
| ; CHECK-NEXT: [[ADJUSTED:%.*]] = extractvalue { i8, i1 } [[AGG]], 0 |
| ; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]]) |
| ; CHECK-NEXT: [[UNDERFLOW:%.*]] = extractvalue { i8, i1 } [[AGG]], 1 |
| ; CHECK-NEXT: call void @use1(i1 [[UNDERFLOW]]) |
| ; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = xor i1 [[UNDERFLOW]], true |
| ; CHECK-NEXT: call void @use1(i1 [[NO_UNDERFLOW]]) |
| ; CHECK-NEXT: [[NOT_NULL:%.*]] = icmp ne i8 [[ADJUSTED]], 0 |
| ; CHECK-NEXT: [[R:%.*]] = and i1 [[NOT_NULL]], [[NO_UNDERFLOW]] |
| ; CHECK-NEXT: ret i1 [[R]] |
| ; |
| %agg = call {i8, i1} @llvm.usub.with.overflow(i8 %base, i8 %offset) |
| call void @useagg({i8, i1} %agg) |
| %adjusted = extractvalue {i8, i1} %agg, 0 |
| call void @use8(i8 %adjusted) |
| %underflow = extractvalue {i8, i1} %agg, 1 |
| call void @use1(i1 %underflow) |
| %no_underflow = xor i1 %underflow, -1 |
| call void @use1(i1 %no_underflow) |
| %not_null = icmp ne i8 %adjusted, 0 |
| %r = select i1 %not_null, i1 %no_underflow, i1 false |
| ret i1 %r |
| } |
| |
| ; Commutativity |
| |
| define i1 @t3_commutability0(i8 %base, i8 %offset) { |
| ; CHECK-LABEL: @t3_commutability0( |
| ; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i8 [[BASE:%.*]], [[OFFSET:%.*]] |
| ; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]]) |
| ; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = icmp ule i8 [[OFFSET]], [[BASE]] |
| ; CHECK-NEXT: call void @use1(i1 [[NO_UNDERFLOW]]) |
| ; CHECK-NEXT: [[NOT_NULL:%.*]] = icmp ne i8 [[BASE]], [[OFFSET]] |
| ; CHECK-NEXT: call void @use1(i1 [[NOT_NULL]]) |
| ; CHECK-NEXT: [[R:%.*]] = icmp ult i8 [[OFFSET]], [[BASE]] |
| ; CHECK-NEXT: ret i1 [[R]] |
| ; |
| %adjusted = sub i8 %base, %offset |
| call void @use8(i8 %adjusted) |
| %no_underflow = icmp ule i8 %offset, %base ; swapped |
| call void @use1(i1 %no_underflow) |
| %not_null = icmp ne i8 %adjusted, 0 |
| call void @use1(i1 %not_null) |
| %r = and i1 %not_null, %no_underflow |
| ret i1 %r |
| } |
| |
| define i1 @t3_commutability0_logical(i8 %base, i8 %offset) { |
| ; CHECK-LABEL: @t3_commutability0_logical( |
| ; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i8 [[BASE:%.*]], [[OFFSET:%.*]] |
| ; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]]) |
| ; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = icmp ule i8 [[OFFSET]], [[BASE]] |
| ; CHECK-NEXT: call void @use1(i1 [[NO_UNDERFLOW]]) |
| ; CHECK-NEXT: [[NOT_NULL:%.*]] = icmp ne i8 [[BASE]], [[OFFSET]] |
| ; CHECK-NEXT: call void @use1(i1 [[NOT_NULL]]) |
| ; CHECK-NEXT: [[R:%.*]] = icmp ult i8 [[OFFSET]], [[BASE]] |
| ; CHECK-NEXT: ret i1 [[R]] |
| ; |
| %adjusted = sub i8 %base, %offset |
| call void @use8(i8 %adjusted) |
| %no_underflow = icmp ule i8 %offset, %base ; swapped |
| call void @use1(i1 %no_underflow) |
| %not_null = icmp ne i8 %adjusted, 0 |
| call void @use1(i1 %not_null) |
| %r = select i1 %not_null, i1 %no_underflow, i1 false |
| ret i1 %r |
| } |
| define i1 @t4_commutability1(i8 %base, i8 %offset) { |
| ; CHECK-LABEL: @t4_commutability1( |
| ; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i8 [[BASE:%.*]], [[OFFSET:%.*]] |
| ; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]]) |
| ; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = icmp uge i8 [[BASE]], [[OFFSET]] |
| ; CHECK-NEXT: call void @use1(i1 [[NO_UNDERFLOW]]) |
| ; CHECK-NEXT: [[NOT_NULL:%.*]] = icmp ne i8 [[BASE]], [[OFFSET]] |
| ; CHECK-NEXT: call void @use1(i1 [[NOT_NULL]]) |
| ; CHECK-NEXT: [[R:%.*]] = icmp ugt i8 [[BASE]], [[OFFSET]] |
| ; CHECK-NEXT: ret i1 [[R]] |
| ; |
| %adjusted = sub i8 %base, %offset |
| call void @use8(i8 %adjusted) |
| %no_underflow = icmp uge i8 %base, %offset |
| call void @use1(i1 %no_underflow) |
| %not_null = icmp ne i8 %adjusted, 0 |
| call void @use1(i1 %not_null) |
| %r = and i1 %no_underflow, %not_null ; swapped |
| ret i1 %r |
| } |
| |
| define i1 @t4_commutability1_logical(i8 %base, i8 %offset) { |
| ; CHECK-LABEL: @t4_commutability1_logical( |
| ; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i8 [[BASE:%.*]], [[OFFSET:%.*]] |
| ; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]]) |
| ; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = icmp uge i8 [[BASE]], [[OFFSET]] |
| ; CHECK-NEXT: call void @use1(i1 [[NO_UNDERFLOW]]) |
| ; CHECK-NEXT: [[NOT_NULL:%.*]] = icmp ne i8 [[BASE]], [[OFFSET]] |
| ; CHECK-NEXT: call void @use1(i1 [[NOT_NULL]]) |
| ; CHECK-NEXT: [[R:%.*]] = icmp ugt i8 [[BASE]], [[OFFSET]] |
| ; CHECK-NEXT: ret i1 [[R]] |
| ; |
| %adjusted = sub i8 %base, %offset |
| call void @use8(i8 %adjusted) |
| %no_underflow = icmp uge i8 %base, %offset |
| call void @use1(i1 %no_underflow) |
| %not_null = icmp ne i8 %adjusted, 0 |
| call void @use1(i1 %not_null) |
| %r = select i1 %no_underflow, i1 %not_null, i1 false ; swapped |
| ret i1 %r |
| } |
| define i1 @t5_commutability2(i8 %base, i8 %offset) { |
| ; CHECK-LABEL: @t5_commutability2( |
| ; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i8 [[BASE:%.*]], [[OFFSET:%.*]] |
| ; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]]) |
| ; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = icmp ule i8 [[OFFSET]], [[BASE]] |
| ; CHECK-NEXT: call void @use1(i1 [[NO_UNDERFLOW]]) |
| ; CHECK-NEXT: [[NOT_NULL:%.*]] = icmp ne i8 [[BASE]], [[OFFSET]] |
| ; CHECK-NEXT: call void @use1(i1 [[NOT_NULL]]) |
| ; CHECK-NEXT: [[R:%.*]] = icmp ugt i8 [[BASE]], [[OFFSET]] |
| ; CHECK-NEXT: ret i1 [[R]] |
| ; |
| %adjusted = sub i8 %base, %offset |
| call void @use8(i8 %adjusted) |
| %no_underflow = icmp ule i8 %offset, %base ; swapped |
| call void @use1(i1 %no_underflow) |
| %not_null = icmp ne i8 %adjusted, 0 |
| call void @use1(i1 %not_null) |
| %r = and i1 %no_underflow, %not_null ; swapped |
| ret i1 %r |
| } |
| |
| define i1 @t5_commutability2_logical(i8 %base, i8 %offset) { |
| ; CHECK-LABEL: @t5_commutability2_logical( |
| ; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i8 [[BASE:%.*]], [[OFFSET:%.*]] |
| ; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]]) |
| ; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = icmp ule i8 [[OFFSET]], [[BASE]] |
| ; CHECK-NEXT: call void @use1(i1 [[NO_UNDERFLOW]]) |
| ; CHECK-NEXT: [[NOT_NULL:%.*]] = icmp ne i8 [[BASE]], [[OFFSET]] |
| ; CHECK-NEXT: call void @use1(i1 [[NOT_NULL]]) |
| ; CHECK-NEXT: [[R:%.*]] = icmp ugt i8 [[BASE]], [[OFFSET]] |
| ; CHECK-NEXT: ret i1 [[R]] |
| ; |
| %adjusted = sub i8 %base, %offset |
| call void @use8(i8 %adjusted) |
| %no_underflow = icmp ule i8 %offset, %base ; swapped |
| call void @use1(i1 %no_underflow) |
| %not_null = icmp ne i8 %adjusted, 0 |
| call void @use1(i1 %not_null) |
| %r = select i1 %no_underflow, i1 %not_null, i1 false ; swapped |
| ret i1 %r |
| } |
| |
| define i1 @t6_commutability(i8 %base, i8 %offset) { |
| ; CHECK-LABEL: @t6_commutability( |
| ; CHECK-NEXT: [[AGG:%.*]] = call { i8, i1 } @llvm.usub.with.overflow.i8(i8 [[BASE:%.*]], i8 [[OFFSET:%.*]]) |
| ; CHECK-NEXT: call void @useagg({ i8, i1 } [[AGG]]) |
| ; CHECK-NEXT: [[ADJUSTED:%.*]] = extractvalue { i8, i1 } [[AGG]], 0 |
| ; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]]) |
| ; CHECK-NEXT: [[UNDERFLOW:%.*]] = extractvalue { i8, i1 } [[AGG]], 1 |
| ; CHECK-NEXT: call void @use1(i1 [[UNDERFLOW]]) |
| ; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = xor i1 [[UNDERFLOW]], true |
| ; CHECK-NEXT: call void @use1(i1 [[NO_UNDERFLOW]]) |
| ; CHECK-NEXT: [[NOT_NULL:%.*]] = icmp ne i8 [[ADJUSTED]], 0 |
| ; CHECK-NEXT: [[R:%.*]] = and i1 [[NOT_NULL]], [[NO_UNDERFLOW]] |
| ; CHECK-NEXT: ret i1 [[R]] |
| ; |
| %agg = call {i8, i1} @llvm.usub.with.overflow(i8 %base, i8 %offset) |
| call void @useagg({i8, i1} %agg) |
| %adjusted = extractvalue {i8, i1} %agg, 0 |
| call void @use8(i8 %adjusted) |
| %underflow = extractvalue {i8, i1} %agg, 1 |
| call void @use1(i1 %underflow) |
| %no_underflow = xor i1 %underflow, -1 |
| call void @use1(i1 %no_underflow) |
| %not_null = icmp ne i8 %adjusted, 0 |
| %r = and i1 %no_underflow, %not_null ; swapped |
| ret i1 %r |
| } |
| |
| define i1 @t6_commutability_logical(i8 %base, i8 %offset) { |
| ; CHECK-LABEL: @t6_commutability_logical( |
| ; CHECK-NEXT: [[AGG:%.*]] = call { i8, i1 } @llvm.usub.with.overflow.i8(i8 [[BASE:%.*]], i8 [[OFFSET:%.*]]) |
| ; CHECK-NEXT: call void @useagg({ i8, i1 } [[AGG]]) |
| ; CHECK-NEXT: [[ADJUSTED:%.*]] = extractvalue { i8, i1 } [[AGG]], 0 |
| ; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]]) |
| ; CHECK-NEXT: [[UNDERFLOW:%.*]] = extractvalue { i8, i1 } [[AGG]], 1 |
| ; CHECK-NEXT: call void @use1(i1 [[UNDERFLOW]]) |
| ; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = xor i1 [[UNDERFLOW]], true |
| ; CHECK-NEXT: call void @use1(i1 [[NO_UNDERFLOW]]) |
| ; CHECK-NEXT: [[NOT_NULL:%.*]] = icmp ne i8 [[ADJUSTED]], 0 |
| ; CHECK-NEXT: [[R:%.*]] = and i1 [[NOT_NULL]], [[NO_UNDERFLOW]] |
| ; CHECK-NEXT: ret i1 [[R]] |
| ; |
| %agg = call {i8, i1} @llvm.usub.with.overflow(i8 %base, i8 %offset) |
| call void @useagg({i8, i1} %agg) |
| %adjusted = extractvalue {i8, i1} %agg, 0 |
| call void @use8(i8 %adjusted) |
| %underflow = extractvalue {i8, i1} %agg, 1 |
| call void @use1(i1 %underflow) |
| %no_underflow = xor i1 %underflow, -1 |
| call void @use1(i1 %no_underflow) |
| %not_null = icmp ne i8 %adjusted, 0 |
| %r = select i1 %no_underflow, i1 %not_null, i1 false ; swapped |
| ret i1 %r |
| } |
| |
| ; What if we were checking the opposite question, that we either got null, |
| ; or overflow happened? |
| |
| define i1 @t7(i8 %base, i8 %offset) { |
| ; CHECK-LABEL: @t7( |
| ; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i8 [[BASE:%.*]], [[OFFSET:%.*]] |
| ; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]]) |
| ; CHECK-NEXT: [[UNDERFLOW:%.*]] = icmp ult i8 [[BASE]], [[OFFSET]] |
| ; CHECK-NEXT: call void @use1(i1 [[UNDERFLOW]]) |
| ; CHECK-NEXT: [[NULL:%.*]] = icmp eq i8 [[BASE]], [[OFFSET]] |
| ; CHECK-NEXT: call void @use1(i1 [[NULL]]) |
| ; CHECK-NEXT: [[R:%.*]] = icmp ule i8 [[BASE]], [[OFFSET]] |
| ; CHECK-NEXT: ret i1 [[R]] |
| ; |
| %adjusted = sub i8 %base, %offset |
| call void @use8(i8 %adjusted) |
| %underflow = icmp ult i8 %base, %offset |
| call void @use1(i1 %underflow) |
| %null = icmp eq i8 %adjusted, 0 |
| call void @use1(i1 %null) |
| %r = or i1 %null, %underflow |
| ret i1 %r |
| } |
| |
| define i1 @t7_logical(i8 %base, i8 %offset) { |
| ; CHECK-LABEL: @t7_logical( |
| ; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i8 [[BASE:%.*]], [[OFFSET:%.*]] |
| ; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]]) |
| ; CHECK-NEXT: [[UNDERFLOW:%.*]] = icmp ult i8 [[BASE]], [[OFFSET]] |
| ; CHECK-NEXT: call void @use1(i1 [[UNDERFLOW]]) |
| ; CHECK-NEXT: [[NULL:%.*]] = icmp eq i8 [[BASE]], [[OFFSET]] |
| ; CHECK-NEXT: call void @use1(i1 [[NULL]]) |
| ; CHECK-NEXT: [[R:%.*]] = icmp ule i8 [[BASE]], [[OFFSET]] |
| ; CHECK-NEXT: ret i1 [[R]] |
| ; |
| %adjusted = sub i8 %base, %offset |
| call void @use8(i8 %adjusted) |
| %underflow = icmp ult i8 %base, %offset |
| call void @use1(i1 %underflow) |
| %null = icmp eq i8 %adjusted, 0 |
| call void @use1(i1 %null) |
| %r = select i1 %null, i1 true, i1 %underflow |
| ret i1 %r |
| } |
| define i1 @t7_nonstrict(i8 %base, i8 %offset) { |
| ; CHECK-LABEL: @t7_nonstrict( |
| ; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i8 [[BASE:%.*]], [[OFFSET:%.*]] |
| ; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]]) |
| ; CHECK-NEXT: [[UNDERFLOW:%.*]] = icmp ule i8 [[BASE]], [[OFFSET]] |
| ; CHECK-NEXT: call void @use1(i1 [[UNDERFLOW]]) |
| ; CHECK-NEXT: [[NULL:%.*]] = icmp eq i8 [[BASE]], [[OFFSET]] |
| ; CHECK-NEXT: call void @use1(i1 [[NULL]]) |
| ; CHECK-NEXT: ret i1 [[UNDERFLOW]] |
| ; |
| %adjusted = sub i8 %base, %offset |
| call void @use8(i8 %adjusted) |
| %underflow = icmp ule i8 %base, %offset ; same is valid for non-strict predicate |
| call void @use1(i1 %underflow) |
| %null = icmp eq i8 %adjusted, 0 |
| call void @use1(i1 %null) |
| %r = or i1 %null, %underflow |
| ret i1 %r |
| } |
| |
| define i1 @t7_nonstrict_logical(i8 %base, i8 %offset) { |
| ; CHECK-LABEL: @t7_nonstrict_logical( |
| ; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i8 [[BASE:%.*]], [[OFFSET:%.*]] |
| ; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]]) |
| ; CHECK-NEXT: [[UNDERFLOW:%.*]] = icmp ule i8 [[BASE]], [[OFFSET]] |
| ; CHECK-NEXT: call void @use1(i1 [[UNDERFLOW]]) |
| ; CHECK-NEXT: [[NULL:%.*]] = icmp eq i8 [[BASE]], [[OFFSET]] |
| ; CHECK-NEXT: call void @use1(i1 [[NULL]]) |
| ; CHECK-NEXT: ret i1 [[UNDERFLOW]] |
| ; |
| %adjusted = sub i8 %base, %offset |
| call void @use8(i8 %adjusted) |
| %underflow = icmp ule i8 %base, %offset ; same is valid for non-strict predicate |
| call void @use1(i1 %underflow) |
| %null = icmp eq i8 %adjusted, 0 |
| call void @use1(i1 %null) |
| %r = select i1 %null, i1 true, i1 %underflow |
| ret i1 %r |
| } |
| |
| define i1 @t8(i8 %base, i8 %offset) { |
| ; CHECK-LABEL: @t8( |
| ; CHECK-NEXT: [[AGG:%.*]] = call { i8, i1 } @llvm.usub.with.overflow.i8(i8 [[BASE:%.*]], i8 [[OFFSET:%.*]]) |
| ; CHECK-NEXT: call void @useagg({ i8, i1 } [[AGG]]) |
| ; CHECK-NEXT: [[ADJUSTED:%.*]] = extractvalue { i8, i1 } [[AGG]], 0 |
| ; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]]) |
| ; CHECK-NEXT: [[UNDERFLOW:%.*]] = extractvalue { i8, i1 } [[AGG]], 1 |
| ; CHECK-NEXT: call void @use1(i1 [[UNDERFLOW]]) |
| ; CHECK-NEXT: [[NULL:%.*]] = icmp eq i8 [[ADJUSTED]], 0 |
| ; CHECK-NEXT: [[R:%.*]] = or i1 [[NULL]], [[UNDERFLOW]] |
| ; CHECK-NEXT: ret i1 [[R]] |
| ; |
| %agg = call {i8, i1} @llvm.usub.with.overflow(i8 %base, i8 %offset) |
| call void @useagg({i8, i1} %agg) |
| %adjusted = extractvalue {i8, i1} %agg, 0 |
| call void @use8(i8 %adjusted) |
| %underflow = extractvalue {i8, i1} %agg, 1 |
| call void @use1(i1 %underflow) |
| %null = icmp eq i8 %adjusted, 0 |
| %r = or i1 %null, %underflow |
| ret i1 %r |
| } |
| |
| define i1 @t8_logical(i8 %base, i8 %offset) { |
| ; CHECK-LABEL: @t8_logical( |
| ; CHECK-NEXT: [[AGG:%.*]] = call { i8, i1 } @llvm.usub.with.overflow.i8(i8 [[BASE:%.*]], i8 [[OFFSET:%.*]]) |
| ; CHECK-NEXT: call void @useagg({ i8, i1 } [[AGG]]) |
| ; CHECK-NEXT: [[ADJUSTED:%.*]] = extractvalue { i8, i1 } [[AGG]], 0 |
| ; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]]) |
| ; CHECK-NEXT: [[UNDERFLOW:%.*]] = extractvalue { i8, i1 } [[AGG]], 1 |
| ; CHECK-NEXT: call void @use1(i1 [[UNDERFLOW]]) |
| ; CHECK-NEXT: [[NULL:%.*]] = icmp eq i8 [[ADJUSTED]], 0 |
| ; CHECK-NEXT: [[R:%.*]] = or i1 [[NULL]], [[UNDERFLOW]] |
| ; CHECK-NEXT: ret i1 [[R]] |
| ; |
| %agg = call {i8, i1} @llvm.usub.with.overflow(i8 %base, i8 %offset) |
| call void @useagg({i8, i1} %agg) |
| %adjusted = extractvalue {i8, i1} %agg, 0 |
| call void @use8(i8 %adjusted) |
| %underflow = extractvalue {i8, i1} %agg, 1 |
| call void @use1(i1 %underflow) |
| %null = icmp eq i8 %adjusted, 0 |
| %r = select i1 %null, i1 true, i1 %underflow |
| ret i1 %r |
| } |
| |
| ; And these patterns also have commutative variants |
| |
| define i1 @t9_commutative(i8 %base, i8 %offset) { |
| ; CHECK-LABEL: @t9_commutative( |
| ; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i8 [[BASE:%.*]], [[OFFSET:%.*]] |
| ; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]]) |
| ; CHECK-NEXT: [[UNDERFLOW:%.*]] = icmp ugt i8 [[OFFSET]], [[BASE]] |
| ; CHECK-NEXT: call void @use1(i1 [[UNDERFLOW]]) |
| ; CHECK-NEXT: [[NULL:%.*]] = icmp eq i8 [[BASE]], [[OFFSET]] |
| ; CHECK-NEXT: call void @use1(i1 [[NULL]]) |
| ; CHECK-NEXT: [[R:%.*]] = icmp uge i8 [[OFFSET]], [[BASE]] |
| ; CHECK-NEXT: ret i1 [[R]] |
| ; |
| %adjusted = sub i8 %base, %offset |
| call void @use8(i8 %adjusted) |
| %underflow = icmp ult i8 %base, %adjusted ; swapped |
| call void @use1(i1 %underflow) |
| %null = icmp eq i8 %adjusted, 0 |
| call void @use1(i1 %null) |
| %r = or i1 %null, %underflow |
| ret i1 %r |
| } |
| |
| define i1 @t9_commutative_logical(i8 %base, i8 %offset) { |
| ; CHECK-LABEL: @t9_commutative_logical( |
| ; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i8 [[BASE:%.*]], [[OFFSET:%.*]] |
| ; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]]) |
| ; CHECK-NEXT: [[UNDERFLOW:%.*]] = icmp ugt i8 [[OFFSET]], [[BASE]] |
| ; CHECK-NEXT: call void @use1(i1 [[UNDERFLOW]]) |
| ; CHECK-NEXT: [[NULL:%.*]] = icmp eq i8 [[BASE]], [[OFFSET]] |
| ; CHECK-NEXT: call void @use1(i1 [[NULL]]) |
| ; CHECK-NEXT: [[R:%.*]] = icmp uge i8 [[OFFSET]], [[BASE]] |
| ; CHECK-NEXT: ret i1 [[R]] |
| ; |
| %adjusted = sub i8 %base, %offset |
| call void @use8(i8 %adjusted) |
| %underflow = icmp ult i8 %base, %adjusted ; swapped |
| call void @use1(i1 %underflow) |
| %null = icmp eq i8 %adjusted, 0 |
| call void @use1(i1 %null) |
| %r = select i1 %null, i1 true, i1 %underflow |
| ret i1 %r |
| } |
| |
| ;------------------------------------------------------------------------------- |
| |
| define i1 @t10(i64 %base, ptr nonnull %offsetptr) { |
| ; CHECK-LABEL: @t10( |
| ; CHECK-NEXT: [[OFFSET:%.*]] = ptrtoint ptr [[OFFSETPTR:%.*]] to i64 |
| ; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i64 [[BASE:%.*]], [[OFFSET]] |
| ; CHECK-NEXT: call void @use64(i64 [[ADJUSTED]]) |
| ; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = icmp ule i64 [[OFFSET]], [[BASE]] |
| ; CHECK-NEXT: call void @use1(i1 [[NO_UNDERFLOW]]) |
| ; CHECK-NEXT: [[NOT_NULL:%.*]] = icmp ne i64 [[OFFSET]], [[BASE]] |
| ; CHECK-NEXT: call void @use1(i1 [[NOT_NULL]]) |
| ; CHECK-NEXT: [[R:%.*]] = icmp ult i64 [[OFFSET]], [[BASE]] |
| ; CHECK-NEXT: ret i1 [[R]] |
| ; |
| %offset = ptrtoint ptr %offsetptr to i64 |
| |
| %adjusted = sub i64 %base, %offset |
| call void @use64(i64 %adjusted) |
| %no_underflow = icmp ult i64 %adjusted, %base |
| call void @use1(i1 %no_underflow) |
| %not_null = icmp ne i64 %adjusted, 0 |
| call void @use1(i1 %not_null) |
| %r = and i1 %not_null, %no_underflow |
| ret i1 %r |
| } |
| |
| define i1 @t10_logical(i64 %base, ptr nonnull %offsetptr) { |
| ; CHECK-LABEL: @t10_logical( |
| ; CHECK-NEXT: [[OFFSET:%.*]] = ptrtoint ptr [[OFFSETPTR:%.*]] to i64 |
| ; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i64 [[BASE:%.*]], [[OFFSET]] |
| ; CHECK-NEXT: call void @use64(i64 [[ADJUSTED]]) |
| ; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = icmp ule i64 [[OFFSET]], [[BASE]] |
| ; CHECK-NEXT: call void @use1(i1 [[NO_UNDERFLOW]]) |
| ; CHECK-NEXT: [[NOT_NULL:%.*]] = icmp ne i64 [[OFFSET]], [[BASE]] |
| ; CHECK-NEXT: call void @use1(i1 [[NOT_NULL]]) |
| ; CHECK-NEXT: [[R:%.*]] = icmp ult i64 [[OFFSET]], [[BASE]] |
| ; CHECK-NEXT: ret i1 [[R]] |
| ; |
| %offset = ptrtoint ptr %offsetptr to i64 |
| |
| %adjusted = sub i64 %base, %offset |
| call void @use64(i64 %adjusted) |
| %no_underflow = icmp ult i64 %adjusted, %base |
| call void @use1(i1 %no_underflow) |
| %not_null = icmp ne i64 %adjusted, 0 |
| call void @use1(i1 %not_null) |
| %r = select i1 %not_null, i1 %no_underflow, i1 false |
| ret i1 %r |
| } |
| define i1 @t11_commutative(i64 %base, ptr nonnull %offsetptr) { |
| ; CHECK-LABEL: @t11_commutative( |
| ; CHECK-NEXT: [[OFFSET:%.*]] = ptrtoint ptr [[OFFSETPTR:%.*]] to i64 |
| ; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i64 [[BASE:%.*]], [[OFFSET]] |
| ; CHECK-NEXT: call void @use64(i64 [[ADJUSTED]]) |
| ; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = icmp ule i64 [[OFFSET]], [[BASE]] |
| ; CHECK-NEXT: call void @use1(i1 [[NO_UNDERFLOW]]) |
| ; CHECK-NEXT: [[NOT_NULL:%.*]] = icmp ne i64 [[OFFSET]], [[BASE]] |
| ; CHECK-NEXT: call void @use1(i1 [[NOT_NULL]]) |
| ; CHECK-NEXT: [[R:%.*]] = icmp ult i64 [[OFFSET]], [[BASE]] |
| ; CHECK-NEXT: ret i1 [[R]] |
| ; |
| %offset = ptrtoint ptr %offsetptr to i64 |
| |
| %adjusted = sub i64 %base, %offset |
| call void @use64(i64 %adjusted) |
| %no_underflow = icmp ugt i64 %base, %adjusted ; swapped |
| call void @use1(i1 %no_underflow) |
| %not_null = icmp ne i64 %adjusted, 0 |
| call void @use1(i1 %not_null) |
| %r = and i1 %not_null, %no_underflow |
| ret i1 %r |
| } |
| |
| define i1 @t11_commutative_logical(i64 %base, ptr nonnull %offsetptr) { |
| ; CHECK-LABEL: @t11_commutative_logical( |
| ; CHECK-NEXT: [[OFFSET:%.*]] = ptrtoint ptr [[OFFSETPTR:%.*]] to i64 |
| ; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i64 [[BASE:%.*]], [[OFFSET]] |
| ; CHECK-NEXT: call void @use64(i64 [[ADJUSTED]]) |
| ; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = icmp ule i64 [[OFFSET]], [[BASE]] |
| ; CHECK-NEXT: call void @use1(i1 [[NO_UNDERFLOW]]) |
| ; CHECK-NEXT: [[NOT_NULL:%.*]] = icmp ne i64 [[OFFSET]], [[BASE]] |
| ; CHECK-NEXT: call void @use1(i1 [[NOT_NULL]]) |
| ; CHECK-NEXT: [[R:%.*]] = icmp ult i64 [[OFFSET]], [[BASE]] |
| ; CHECK-NEXT: ret i1 [[R]] |
| ; |
| %offset = ptrtoint ptr %offsetptr to i64 |
| |
| %adjusted = sub i64 %base, %offset |
| call void @use64(i64 %adjusted) |
| %no_underflow = icmp ugt i64 %base, %adjusted ; swapped |
| call void @use1(i1 %no_underflow) |
| %not_null = icmp ne i64 %adjusted, 0 |
| call void @use1(i1 %not_null) |
| %r = select i1 %not_null, i1 %no_underflow, i1 false |
| ret i1 %r |
| } |
| |
| define i1 @t12(i64 %base, ptr nonnull %offsetptr) { |
| ; CHECK-LABEL: @t12( |
| ; CHECK-NEXT: [[OFFSET:%.*]] = ptrtoint ptr [[OFFSETPTR:%.*]] to i64 |
| ; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i64 [[BASE:%.*]], [[OFFSET]] |
| ; CHECK-NEXT: call void @use64(i64 [[ADJUSTED]]) |
| ; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = icmp ugt i64 [[OFFSET]], [[BASE]] |
| ; CHECK-NEXT: call void @use1(i1 [[NO_UNDERFLOW]]) |
| ; CHECK-NEXT: [[NOT_NULL:%.*]] = icmp eq i64 [[OFFSET]], [[BASE]] |
| ; CHECK-NEXT: call void @use1(i1 [[NOT_NULL]]) |
| ; CHECK-NEXT: [[R:%.*]] = icmp uge i64 [[OFFSET]], [[BASE]] |
| ; CHECK-NEXT: ret i1 [[R]] |
| ; |
| %offset = ptrtoint ptr %offsetptr to i64 |
| |
| %adjusted = sub i64 %base, %offset |
| call void @use64(i64 %adjusted) |
| %no_underflow = icmp uge i64 %adjusted, %base |
| call void @use1(i1 %no_underflow) |
| %not_null = icmp eq i64 %adjusted, 0 |
| call void @use1(i1 %not_null) |
| %r = or i1 %not_null, %no_underflow |
| ret i1 %r |
| } |
| |
| define i1 @t12_logical(i64 %base, ptr nonnull %offsetptr) { |
| ; CHECK-LABEL: @t12_logical( |
| ; CHECK-NEXT: [[OFFSET:%.*]] = ptrtoint ptr [[OFFSETPTR:%.*]] to i64 |
| ; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i64 [[BASE:%.*]], [[OFFSET]] |
| ; CHECK-NEXT: call void @use64(i64 [[ADJUSTED]]) |
| ; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = icmp ugt i64 [[OFFSET]], [[BASE]] |
| ; CHECK-NEXT: call void @use1(i1 [[NO_UNDERFLOW]]) |
| ; CHECK-NEXT: [[NOT_NULL:%.*]] = icmp eq i64 [[OFFSET]], [[BASE]] |
| ; CHECK-NEXT: call void @use1(i1 [[NOT_NULL]]) |
| ; CHECK-NEXT: [[R:%.*]] = icmp uge i64 [[OFFSET]], [[BASE]] |
| ; CHECK-NEXT: ret i1 [[R]] |
| ; |
| %offset = ptrtoint ptr %offsetptr to i64 |
| |
| %adjusted = sub i64 %base, %offset |
| call void @use64(i64 %adjusted) |
| %no_underflow = icmp uge i64 %adjusted, %base |
| call void @use1(i1 %no_underflow) |
| %not_null = icmp eq i64 %adjusted, 0 |
| call void @use1(i1 %not_null) |
| %r = select i1 %not_null, i1 true, i1 %no_underflow |
| ret i1 %r |
| } |
| define i1 @t13(i64 %base, ptr nonnull %offsetptr) { |
| ; CHECK-LABEL: @t13( |
| ; CHECK-NEXT: [[OFFSET:%.*]] = ptrtoint ptr [[OFFSETPTR:%.*]] to i64 |
| ; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i64 [[BASE:%.*]], [[OFFSET]] |
| ; CHECK-NEXT: call void @use64(i64 [[ADJUSTED]]) |
| ; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = icmp ugt i64 [[OFFSET]], [[BASE]] |
| ; CHECK-NEXT: call void @use1(i1 [[NO_UNDERFLOW]]) |
| ; CHECK-NEXT: [[NOT_NULL:%.*]] = icmp eq i64 [[OFFSET]], [[BASE]] |
| ; CHECK-NEXT: call void @use1(i1 [[NOT_NULL]]) |
| ; CHECK-NEXT: [[R:%.*]] = icmp uge i64 [[OFFSET]], [[BASE]] |
| ; CHECK-NEXT: ret i1 [[R]] |
| ; |
| %offset = ptrtoint ptr %offsetptr to i64 |
| |
| %adjusted = sub i64 %base, %offset |
| call void @use64(i64 %adjusted) |
| %no_underflow = icmp ule i64 %base, %adjusted ; swapped |
| call void @use1(i1 %no_underflow) |
| %not_null = icmp eq i64 %adjusted, 0 |
| call void @use1(i1 %not_null) |
| %r = or i1 %not_null, %no_underflow |
| ret i1 %r |
| } |
| |
| define i1 @t13_logical(i64 %base, ptr nonnull %offsetptr) { |
| ; CHECK-LABEL: @t13_logical( |
| ; CHECK-NEXT: [[OFFSET:%.*]] = ptrtoint ptr [[OFFSETPTR:%.*]] to i64 |
| ; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i64 [[BASE:%.*]], [[OFFSET]] |
| ; CHECK-NEXT: call void @use64(i64 [[ADJUSTED]]) |
| ; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = icmp ugt i64 [[OFFSET]], [[BASE]] |
| ; CHECK-NEXT: call void @use1(i1 [[NO_UNDERFLOW]]) |
| ; CHECK-NEXT: [[NOT_NULL:%.*]] = icmp eq i64 [[OFFSET]], [[BASE]] |
| ; CHECK-NEXT: call void @use1(i1 [[NOT_NULL]]) |
| ; CHECK-NEXT: [[R:%.*]] = icmp uge i64 [[OFFSET]], [[BASE]] |
| ; CHECK-NEXT: ret i1 [[R]] |
| ; |
| %offset = ptrtoint ptr %offsetptr to i64 |
| |
| %adjusted = sub i64 %base, %offset |
| call void @use64(i64 %adjusted) |
| %no_underflow = icmp ule i64 %base, %adjusted ; swapped |
| call void @use1(i1 %no_underflow) |
| %not_null = icmp eq i64 %adjusted, 0 |
| call void @use1(i1 %not_null) |
| %r = select i1 %not_null, i1 true, i1 %no_underflow |
| ret i1 %r |
| } |
| |
| define i1 @t14_bad(i64 %base, i64 %offset) { |
| ; CHECK-LABEL: @t14_bad( |
| ; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i64 [[BASE:%.*]], [[OFFSET:%.*]] |
| ; CHECK-NEXT: call void @use64(i64 [[ADJUSTED]]) |
| ; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = icmp ult i64 [[ADJUSTED]], [[BASE]] |
| ; CHECK-NEXT: call void @use1(i1 [[NO_UNDERFLOW]]) |
| ; CHECK-NEXT: [[NOT_NULL:%.*]] = icmp ne i64 [[BASE]], [[OFFSET]] |
| ; CHECK-NEXT: call void @use1(i1 [[NOT_NULL]]) |
| ; CHECK-NEXT: [[R:%.*]] = and i1 [[NOT_NULL]], [[NO_UNDERFLOW]] |
| ; CHECK-NEXT: ret i1 [[R]] |
| ; |
| %adjusted = sub i64 %base, %offset |
| call void @use64(i64 %adjusted) |
| %no_underflow = icmp ult i64 %adjusted, %base |
| call void @use1(i1 %no_underflow) |
| %not_null = icmp ne i64 %adjusted, 0 |
| call void @use1(i1 %not_null) |
| %r = and i1 %not_null, %no_underflow |
| ret i1 %r |
| } |
| |
| define i1 @t14_bad_logical(i64 %base, i64 %offset) { |
| ; CHECK-LABEL: @t14_bad_logical( |
| ; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i64 [[BASE:%.*]], [[OFFSET:%.*]] |
| ; CHECK-NEXT: call void @use64(i64 [[ADJUSTED]]) |
| ; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = icmp ult i64 [[ADJUSTED]], [[BASE]] |
| ; CHECK-NEXT: call void @use1(i1 [[NO_UNDERFLOW]]) |
| ; CHECK-NEXT: [[NOT_NULL:%.*]] = icmp ne i64 [[BASE]], [[OFFSET]] |
| ; CHECK-NEXT: call void @use1(i1 [[NOT_NULL]]) |
| ; CHECK-NEXT: [[R:%.*]] = and i1 [[NOT_NULL]], [[NO_UNDERFLOW]] |
| ; CHECK-NEXT: ret i1 [[R]] |
| ; |
| %adjusted = sub i64 %base, %offset |
| call void @use64(i64 %adjusted) |
| %no_underflow = icmp ult i64 %adjusted, %base |
| call void @use1(i1 %no_underflow) |
| %not_null = icmp ne i64 %adjusted, 0 |
| call void @use1(i1 %not_null) |
| %r = select i1 %not_null, i1 %no_underflow, i1 false |
| ret i1 %r |
| } |
| |
| define i1 @base_ult_offset(i8 %base, i8 %offset) { |
| ; CHECK-LABEL: @base_ult_offset( |
| ; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i8 [[BASE:%.*]], [[OFFSET:%.*]] |
| ; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]]) |
| ; CHECK-NEXT: [[R:%.*]] = icmp ult i8 [[BASE]], [[OFFSET]] |
| ; CHECK-NEXT: ret i1 [[R]] |
| ; |
| %adjusted = sub i8 %base, %offset |
| call void @use8(i8 %adjusted) |
| %not_null = icmp ne i8 %adjusted, 0 |
| %no_underflow = icmp ule i8 %base, %offset |
| %r = and i1 %no_underflow, %not_null |
| ret i1 %r |
| } |
| |
| define i1 @base_ult_offset_logical(i8 %base, i8 %offset) { |
| ; CHECK-LABEL: @base_ult_offset_logical( |
| ; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i8 [[BASE:%.*]], [[OFFSET:%.*]] |
| ; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]]) |
| ; CHECK-NEXT: [[R:%.*]] = icmp ult i8 [[BASE]], [[OFFSET]] |
| ; CHECK-NEXT: ret i1 [[R]] |
| ; |
| %adjusted = sub i8 %base, %offset |
| call void @use8(i8 %adjusted) |
| %not_null = icmp ne i8 %adjusted, 0 |
| %no_underflow = icmp ule i8 %base, %offset |
| %r = select i1 %no_underflow, i1 %not_null, i1 false |
| ret i1 %r |
| } |
| define i1 @base_uge_offset(i8 %base, i8 %offset) { |
| ; CHECK-LABEL: @base_uge_offset( |
| ; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i8 [[BASE:%.*]], [[OFFSET:%.*]] |
| ; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]]) |
| ; CHECK-NEXT: [[R:%.*]] = icmp uge i8 [[BASE]], [[OFFSET]] |
| ; CHECK-NEXT: ret i1 [[R]] |
| ; |
| %adjusted = sub i8 %base, %offset |
| call void @use8(i8 %adjusted) |
| %not_null = icmp eq i8 %adjusted, 0 |
| %no_underflow = icmp ugt i8 %base, %offset |
| %r = or i1 %no_underflow, %not_null |
| ret i1 %r |
| } |
| |
| define i1 @base_uge_offset_logical(i8 %base, i8 %offset) { |
| ; CHECK-LABEL: @base_uge_offset_logical( |
| ; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i8 [[BASE:%.*]], [[OFFSET:%.*]] |
| ; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]]) |
| ; CHECK-NEXT: [[R:%.*]] = icmp uge i8 [[BASE]], [[OFFSET]] |
| ; CHECK-NEXT: ret i1 [[R]] |
| ; |
| %adjusted = sub i8 %base, %offset |
| call void @use8(i8 %adjusted) |
| %not_null = icmp eq i8 %adjusted, 0 |
| %no_underflow = icmp ugt i8 %base, %offset |
| %r = select i1 %no_underflow, i1 true, i1 %not_null |
| ret i1 %r |
| } |
