| ; RUN: opt < %s -passes='asan-pipeline' -S | FileCheck %s |
| |
| ; Source (-O0 -fsanitize=address -fsanitize-address-use-after-scope): |
| ;; struct S { int x, y; }; |
| ;; void swap(S *a, S *b, bool doit) { |
| ;; if (!doit) |
| ;; return; |
| ;; auto tmp = *a; |
| ;; *a = *b; |
| ;; *b = tmp; |
| ;; } |
| |
| target datalayout = "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" |
| target triple = "x86_64-apple-macosx10.14.0" |
| |
| %struct.S = type { i32, i32 } |
| |
| ; CHECK-LABEL: define {{.*}} @_Z4swapP1SS0_b( |
| |
| ; First come the argument allocas. |
| ; CHECK: [[argA:%.*]] = alloca %struct.S*, |
| ; CHECK-NEXT: [[argB:%.*]] = alloca %struct.S*, |
| ; CHECK-NEXT: [[argDoit:%.*]] = alloca i8, |
| |
| ; Next, the stores into the argument allocas. |
| ; CHECK-NEXT: store %struct.S* {{.*}}, %struct.S** [[argA]] |
| ; CHECK-NEXT: store %struct.S* {{.*}}, %struct.S** [[argB]] |
| ; CHECK-NEXT: [[frombool:%.*]] = zext i1 {{.*}} to i8 |
| ; CHECK-NEXT: store i8 [[frombool]], i8* [[argDoit]] |
| |
| define void @_Z4swapP1SS0_b(%struct.S* %a, %struct.S* %b, i1 zeroext %doit) sanitize_address { |
| entry: |
| %a.addr = alloca %struct.S*, align 8 |
| %b.addr = alloca %struct.S*, align 8 |
| %doit.addr = alloca i8, align 1 |
| %tmp = alloca %struct.S, align 4 |
| store %struct.S* %a, %struct.S** %a.addr, align 8 |
| store %struct.S* %b, %struct.S** %b.addr, align 8 |
| %frombool = zext i1 %doit to i8 |
| store i8 %frombool, i8* %doit.addr, align 1 |
| %0 = load i8, i8* %doit.addr, align 1 |
| %tobool = trunc i8 %0 to i1 |
| br i1 %tobool, label %if.end, label %if.then |
| |
| if.then: ; preds = %entry |
| br label %return |
| |
| if.end: ; preds = %entry |
| %1 = load %struct.S*, %struct.S** %a.addr, align 8 |
| %2 = bitcast %struct.S* %tmp to i8* |
| %3 = bitcast %struct.S* %1 to i8* |
| call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 4 %2, i8* align 4 %3, i64 8, i1 false) |
| %4 = load %struct.S*, %struct.S** %b.addr, align 8 |
| %5 = load %struct.S*, %struct.S** %a.addr, align 8 |
| %6 = bitcast %struct.S* %5 to i8* |
| %7 = bitcast %struct.S* %4 to i8* |
| call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 4 %6, i8* align 4 %7, i64 8, i1 false) |
| %8 = load %struct.S*, %struct.S** %b.addr, align 8 |
| %9 = bitcast %struct.S* %8 to i8* |
| %10 = bitcast %struct.S* %tmp to i8* |
| call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 4 %9, i8* align 4 %10, i64 8, i1 false) |
| br label %return |
| |
| return: ; preds = %if.end, %if.then |
| ret void |
| } |
| |
| ; Synthetic test case, meant to check that we do not reorder instructions past |
| ; a load when attempting to hoist argument init insts. |
| ; CHECK-LABEL: define {{.*}} @func_with_load_in_arginit_sequence |
| ; CHECK: [[argA:%.*]] = alloca %struct.S*, |
| ; CHECK-NEXT: [[argB:%.*]] = alloca %struct.S*, |
| ; CHECK-NEXT: [[argDoit:%.*]] = alloca i8, |
| ; CHECK-NEXT: store %struct.S* {{.*}}, %struct.S** [[argA]] |
| ; CHECK-NEXT: store %struct.S* {{.*}}, %struct.S** [[argB]] |
| ; CHECK-NEXT: [[stack_base:%.*]] = alloca i64 |
| define void @func_with_load_in_arginit_sequence(%struct.S* %a, %struct.S* %b, i1 zeroext %doit) sanitize_address { |
| entry: |
| %a.addr = alloca %struct.S*, align 8 |
| %b.addr = alloca %struct.S*, align 8 |
| %doit.addr = alloca i8, align 1 |
| %tmp = alloca %struct.S, align 4 |
| store %struct.S* %a, %struct.S** %a.addr, align 8 |
| store %struct.S* %b, %struct.S** %b.addr, align 8 |
| |
| ; This load prevents the next argument init sequence from being moved. |
| %0 = load i8, i8* %doit.addr, align 1 |
| |
| %frombool = zext i1 %doit to i8 |
| store i8 %frombool, i8* %doit.addr, align 1 |
| %tobool = trunc i8 %0 to i1 |
| br i1 %tobool, label %if.end, label %if.then |
| |
| if.then: ; preds = %entry |
| br label %return |
| |
| if.end: ; preds = %entry |
| %1 = load %struct.S*, %struct.S** %a.addr, align 8 |
| %2 = bitcast %struct.S* %tmp to i8* |
| %3 = bitcast %struct.S* %1 to i8* |
| call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 4 %2, i8* align 4 %3, i64 8, i1 false) |
| %4 = load %struct.S*, %struct.S** %b.addr, align 8 |
| %5 = load %struct.S*, %struct.S** %a.addr, align 8 |
| %6 = bitcast %struct.S* %5 to i8* |
| %7 = bitcast %struct.S* %4 to i8* |
| call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 4 %6, i8* align 4 %7, i64 8, i1 false) |
| %8 = load %struct.S*, %struct.S** %b.addr, align 8 |
| %9 = bitcast %struct.S* %8 to i8* |
| %10 = bitcast %struct.S* %tmp to i8* |
| call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 4 %9, i8* align 4 %10, i64 8, i1 false) |
| br label %return |
| |
| return: ; preds = %if.end, %if.then |
| ret void |
| } |
| |
| ; Synthetic test case, meant to check that we can handle functions with more |
| ; than one interesting alloca. |
| ; CHECK-LABEL: define {{.*}} @func_with_multiple_interesting_allocas |
| ; CHECK: [[argA:%.*]] = alloca %struct.S*, |
| ; CHECK-NEXT: [[argB:%.*]] = alloca %struct.S*, |
| ; CHECK-NEXT: [[argDoit:%.*]] = alloca i8, |
| ; CHECK-NEXT: store %struct.S* {{.*}}, %struct.S** [[argA]] |
| ; CHECK-NEXT: store %struct.S* {{.*}}, %struct.S** [[argB]] |
| ; CHECK-NEXT: [[frombool:%.*]] = zext i1 {{.*}} to i8 |
| ; CHECK-NEXT: store i8 [[frombool]], i8* [[argDoit]] |
| define void @func_with_multiple_interesting_allocas(%struct.S* %a, %struct.S* %b, i1 zeroext %doit) sanitize_address { |
| entry: |
| %a.addr = alloca %struct.S*, align 8 |
| %b.addr = alloca %struct.S*, align 8 |
| %doit.addr = alloca i8, align 1 |
| %tmp = alloca %struct.S, align 4 |
| %tmp2 = alloca %struct.S, align 4 |
| store %struct.S* %a, %struct.S** %a.addr, align 8 |
| store %struct.S* %b, %struct.S** %b.addr, align 8 |
| %frombool = zext i1 %doit to i8 |
| store i8 %frombool, i8* %doit.addr, align 1 |
| %0 = load i8, i8* %doit.addr, align 1 |
| %tobool = trunc i8 %0 to i1 |
| br i1 %tobool, label %if.end, label %if.then |
| |
| if.then: ; preds = %entry |
| br label %return |
| |
| if.end: ; preds = %entry |
| %1 = load %struct.S*, %struct.S** %a.addr, align 8 |
| %2 = bitcast %struct.S* %tmp to i8* |
| %3 = bitcast %struct.S* %1 to i8* |
| call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 4 %2, i8* align 4 %3, i64 8, i1 false) |
| %4 = load %struct.S*, %struct.S** %b.addr, align 8 |
| %5 = bitcast %struct.S* %tmp2 to i8* |
| %6 = bitcast %struct.S* %4 to i8* |
| call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 4 %5, i8* align 4 %6, i64 8, i1 false) |
| %7 = load %struct.S*, %struct.S** %b.addr, align 8 |
| %8 = load %struct.S*, %struct.S** %a.addr, align 8 |
| %9 = bitcast %struct.S* %8 to i8* |
| %10 = bitcast %struct.S* %7 to i8* |
| call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 4 %9, i8* align 4 %10, i64 8, i1 false) |
| %11 = load %struct.S*, %struct.S** %b.addr, align 8 |
| %12 = bitcast %struct.S* %11 to i8* |
| %13 = bitcast %struct.S* %tmp to i8* |
| call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 4 %12, i8* align 4 %13, i64 8, i1 false) |
| %14 = load %struct.S*, %struct.S** %a.addr, align 8 |
| %15 = bitcast %struct.S* %14 to i8* |
| %16 = bitcast %struct.S* %tmp2 to i8* |
| call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 4 %15, i8* align 4 %16, i64 8, i1 false) |
| br label %return |
| |
| return: ; preds = %if.end, %if.then |
| ret void |
| } |
| |
| declare void @llvm.memcpy.p0i8.p0i8.i64(i8* noalias nocapture writeonly, i8* noalias nocapture readonly, i64, i1 immarg) |