1; This check verifies that arguments passed by value get redzones. 2; RUN: opt < %s -asan -asan-realign-stack=32 -S | FileCheck %s 3; RUN: opt < %s -asan -asan-realign-stack=32 -asan-force-dynamic-shadow -S | FileCheck %s 4; RUN: opt < %s -asan -asan-realign-stack=32 -asan-mapping-scale=5 -S | FileCheck %s 5; RUN: opt < %s -asan -asan-realign-stack=32 -asan-force-dynamic-shadow -asan-mapping-scale=5 -S | FileCheck %s 6 7 8target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64" 9target triple = "x86_64-unknown-linux-gnu" 10 11%struct.A = type { [8 x i32] } 12 13declare i32 @bar(%struct.A*) 14 15; Test behavior for named argument with explicit alignment. The memcpy and 16; alloca alignments should match the explicit alignment of 64. 17define void @foo(%struct.A* byval align 64 %a) sanitize_address { 18entry: 19; CHECK-LABEL: foo 20; CHECK: call i64 @__asan_stack_malloc 21; CHECK: alloca i8, i64 {{.*}} align 64 22; CHECK: [[copyPtr:%[^ \t]+]] = inttoptr i64 %{{[^ \t]+}} to %struct.A* 23; CHECK: [[copyBytePtr:%[^ \t]+]] = bitcast %struct.A* [[copyPtr]] 24; CHECK: [[aBytePtr:%[^ \t]+]] = bitcast %struct.A* %a 25; CHECK: call void @llvm.memcpy{{[^%]+}}[[copyBytePtr]]{{[^%]+}} align 64 [[aBytePtr]],{{[^,]+}}, 26; CHECK: call i32 @bar(%struct.A* [[copyPtr]]) 27; CHECK: ret void 28 29 %call = call i32 @bar(%struct.A* %a) 30 ret void 31} 32 33; Test behavior for unnamed argument without explicit alignment. In this case, 34; the first argument is referenced by the identifier %0 and the ABI requires a 35; minimum alignment of 4 bytes since struct.A contains i32s which have 4-byte 36; alignment. However, the alloca alignment will be 32 since that is the value 37; passed via the -asan-realign-stack option, which is greater than 4. 38define void @baz(%struct.A* byval) sanitize_address { 39entry: 40; CHECK-LABEL: baz 41; CHECK: call i64 @__asan_stack_malloc 42; CHECK: alloca i8, i64 {{.*}} align 32 43; CHECK: [[copyPtr:%[^ \t]+]] = inttoptr i64 %{{[^ \t]+}} to %struct.A* 44; CHECK: [[copyBytePtr:%[^ \t]+]] = bitcast %struct.A* [[copyPtr]] 45; CHECK: [[aBytePtr:%[^ \t]+]] = bitcast %struct.A* %0 46; CHECK: call void @llvm.memcpy{{[^%]+}}[[copyBytePtr]]{{[^%]+}} align 4 [[aBytePtr]],{{[^,]+}} 47; CHECK: call i32 @bar(%struct.A* [[copyPtr]]) 48; CHECK: ret void 49 50 %call = call i32 @bar(%struct.A* %0) 51 ret void 52} 53