| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt -passes=poison-checking -S < %s | FileCheck %s |
| |
| ; This file contains tests to exercise the UB triggering instructions with |
| ; a potential source of UB. The UB source is kept simple; we focus on the |
| ; UB triggering instructions here. |
| |
| define void @store(i8* %base, i32 %a) { |
| ; CHECK-LABEL: @store( |
| ; CHECK-NEXT: [[TMP1:%.*]] = call { i32, i1 } @llvm.sadd.with.overflow.i32(i32 [[A:%.*]], i32 1) |
| ; CHECK-NEXT: [[TMP2:%.*]] = extractvalue { i32, i1 } [[TMP1]], 1 |
| ; CHECK-NEXT: [[ADD:%.*]] = add nsw i32 [[A]], 1 |
| ; CHECK-NEXT: [[P:%.*]] = getelementptr i8, i8* [[BASE:%.*]], i32 [[ADD]] |
| ; CHECK-NEXT: [[TMP3:%.*]] = xor i1 [[TMP2]], true |
| ; CHECK-NEXT: call void @__poison_checker_assert(i1 [[TMP3]]) |
| ; CHECK-NEXT: store i8 0, i8* [[P]] |
| ; CHECK-NEXT: ret void |
| ; |
| %add = add nsw i32 %a, 1 |
| %p = getelementptr i8, i8* %base, i32 %add |
| store i8 0, i8* %p |
| ret void |
| } |
| |
| define void @load(i8* %base, i32 %a) { |
| ; CHECK-LABEL: @load( |
| ; CHECK-NEXT: [[TMP1:%.*]] = call { i32, i1 } @llvm.sadd.with.overflow.i32(i32 [[A:%.*]], i32 1) |
| ; CHECK-NEXT: [[TMP2:%.*]] = extractvalue { i32, i1 } [[TMP1]], 1 |
| ; CHECK-NEXT: [[ADD:%.*]] = add nsw i32 [[A]], 1 |
| ; CHECK-NEXT: [[P:%.*]] = getelementptr i8, i8* [[BASE:%.*]], i32 [[ADD]] |
| ; CHECK-NEXT: [[TMP3:%.*]] = xor i1 [[TMP2]], true |
| ; CHECK-NEXT: call void @__poison_checker_assert(i1 [[TMP3]]) |
| ; CHECK-NEXT: [[TMP4:%.*]] = load volatile i8, i8* [[P]] |
| ; CHECK-NEXT: ret void |
| ; |
| %add = add nsw i32 %a, 1 |
| %p = getelementptr i8, i8* %base, i32 %add |
| load volatile i8, i8* %p |
| ret void |
| } |
| |
| define void @atomicrmw(i8* %base, i32 %a) { |
| ; CHECK-LABEL: @atomicrmw( |
| ; CHECK-NEXT: [[TMP1:%.*]] = call { i32, i1 } @llvm.sadd.with.overflow.i32(i32 [[A:%.*]], i32 1) |
| ; CHECK-NEXT: [[TMP2:%.*]] = extractvalue { i32, i1 } [[TMP1]], 1 |
| ; CHECK-NEXT: [[ADD:%.*]] = add nsw i32 [[A]], 1 |
| ; CHECK-NEXT: [[P:%.*]] = getelementptr i8, i8* [[BASE:%.*]], i32 [[ADD]] |
| ; CHECK-NEXT: [[TMP3:%.*]] = xor i1 [[TMP2]], true |
| ; CHECK-NEXT: call void @__poison_checker_assert(i1 [[TMP3]]) |
| ; CHECK-NEXT: [[TMP4:%.*]] = atomicrmw add i8* [[P]], i8 1 seq_cst |
| ; CHECK-NEXT: ret void |
| ; |
| %add = add nsw i32 %a, 1 |
| %p = getelementptr i8, i8* %base, i32 %add |
| atomicrmw add i8* %p, i8 1 seq_cst |
| ret void |
| } |
| |
| define void @cmpxchg(i8* %base, i32 %a) { |
| ; CHECK-LABEL: @cmpxchg( |
| ; CHECK-NEXT: [[TMP1:%.*]] = call { i32, i1 } @llvm.sadd.with.overflow.i32(i32 [[A:%.*]], i32 1) |
| ; CHECK-NEXT: [[TMP2:%.*]] = extractvalue { i32, i1 } [[TMP1]], 1 |
| ; CHECK-NEXT: [[ADD:%.*]] = add nsw i32 [[A]], 1 |
| ; CHECK-NEXT: [[P:%.*]] = getelementptr i8, i8* [[BASE:%.*]], i32 [[ADD]] |
| ; CHECK-NEXT: [[TMP3:%.*]] = xor i1 [[TMP2]], true |
| ; CHECK-NEXT: call void @__poison_checker_assert(i1 [[TMP3]]) |
| ; CHECK-NEXT: [[TMP4:%.*]] = cmpxchg i8* [[P]], i8 1, i8 0 seq_cst seq_cst |
| ; CHECK-NEXT: ret void |
| ; |
| %add = add nsw i32 %a, 1 |
| %p = getelementptr i8, i8* %base, i32 %add |
| cmpxchg i8* %p, i8 1, i8 0 seq_cst seq_cst |
| ret void |
| } |
| |
| define i32 @udiv(i8* %base, i32 %a) { |
| ; CHECK-LABEL: @udiv( |
| ; CHECK-NEXT: [[TMP1:%.*]] = call { i32, i1 } @llvm.uadd.with.overflow.i32(i32 [[A:%.*]], i32 1) |
| ; CHECK-NEXT: [[TMP2:%.*]] = extractvalue { i32, i1 } [[TMP1]], 1 |
| ; CHECK-NEXT: [[ADD:%.*]] = add nuw i32 [[A]], 1 |
| ; CHECK-NEXT: [[TMP3:%.*]] = xor i1 [[TMP2]], true |
| ; CHECK-NEXT: call void @__poison_checker_assert(i1 [[TMP3]]) |
| ; CHECK-NEXT: [[RES:%.*]] = udiv i32 2048, [[ADD]] |
| ; CHECK-NEXT: ret i32 [[RES]] |
| ; |
| %add = add nuw i32 %a, 1 |
| %res = udiv i32 2048, %add |
| ret i32 %res |
| } |
| |
| define i32 @sdiv(i8* %base, i32 %a) { |
| ; CHECK-LABEL: @sdiv( |
| ; CHECK-NEXT: [[TMP1:%.*]] = call { i32, i1 } @llvm.uadd.with.overflow.i32(i32 [[A:%.*]], i32 1) |
| ; CHECK-NEXT: [[TMP2:%.*]] = extractvalue { i32, i1 } [[TMP1]], 1 |
| ; CHECK-NEXT: [[ADD:%.*]] = add nuw i32 [[A]], 1 |
| ; CHECK-NEXT: [[TMP3:%.*]] = xor i1 [[TMP2]], true |
| ; CHECK-NEXT: call void @__poison_checker_assert(i1 [[TMP3]]) |
| ; CHECK-NEXT: [[RES:%.*]] = sdiv i32 2048, [[ADD]] |
| ; CHECK-NEXT: ret i32 [[RES]] |
| ; |
| %add = add nuw i32 %a, 1 |
| %res = sdiv i32 2048, %add |
| ret i32 %res |
| } |
| |
| define i32 @urem(i8* %base, i32 %a) { |
| ; CHECK-LABEL: @urem( |
| ; CHECK-NEXT: [[TMP1:%.*]] = call { i32, i1 } @llvm.uadd.with.overflow.i32(i32 [[A:%.*]], i32 1) |
| ; CHECK-NEXT: [[TMP2:%.*]] = extractvalue { i32, i1 } [[TMP1]], 1 |
| ; CHECK-NEXT: [[ADD:%.*]] = add nuw i32 [[A]], 1 |
| ; CHECK-NEXT: [[TMP3:%.*]] = xor i1 [[TMP2]], true |
| ; CHECK-NEXT: call void @__poison_checker_assert(i1 [[TMP3]]) |
| ; CHECK-NEXT: [[RES:%.*]] = urem i32 2048, [[ADD]] |
| ; CHECK-NEXT: ret i32 [[RES]] |
| ; |
| %add = add nuw i32 %a, 1 |
| %res = urem i32 2048, %add |
| ret i32 %res |
| } |
| |
| define i32 @srem(i8* %base, i32 %a) { |
| ; CHECK-LABEL: @srem( |
| ; CHECK-NEXT: [[TMP1:%.*]] = call { i32, i1 } @llvm.uadd.with.overflow.i32(i32 [[A:%.*]], i32 1) |
| ; CHECK-NEXT: [[TMP2:%.*]] = extractvalue { i32, i1 } [[TMP1]], 1 |
| ; CHECK-NEXT: [[ADD:%.*]] = add nuw i32 [[A]], 1 |
| ; CHECK-NEXT: [[TMP3:%.*]] = xor i1 [[TMP2]], true |
| ; CHECK-NEXT: call void @__poison_checker_assert(i1 [[TMP3]]) |
| ; CHECK-NEXT: [[RES:%.*]] = srem i32 2048, [[ADD]] |
| ; CHECK-NEXT: ret i32 [[RES]] |
| ; |
| %add = add nuw i32 %a, 1 |
| %res = srem i32 2048, %add |
| ret i32 %res |
| } |
| |
| |
| |