1; This check verifies that arguments passed by value get redzones. 2; RUN: opt < %s -asan -enable-new-pm=0 -asan-realign-stack=32 -S | FileCheck %s 3; RUN: opt < %s -passes='asan-function-pipeline' -asan-realign-stack=32 -S | FileCheck %s 4; RUN: opt < %s -asan -enable-new-pm=0 -asan-realign-stack=32 -asan-force-dynamic-shadow -S | FileCheck %s 5; RUN: opt < %s -passes='asan-function-pipeline' -asan-realign-stack=32 -asan-force-dynamic-shadow -S | FileCheck %s 6; RUN: opt < %s -asan -enable-new-pm=0 -asan-realign-stack=32 -asan-mapping-scale=5 -S | FileCheck %s 7; RUN: opt < %s -passes='asan-function-pipeline' -asan-realign-stack=32 -asan-mapping-scale=5 -S | FileCheck %s 8; RUN: opt < %s -asan -enable-new-pm=0 -asan-realign-stack=32 -asan-force-dynamic-shadow -asan-mapping-scale=5 -S | FileCheck %s 9; RUN: opt < %s -passes='asan-function-pipeline' -asan-realign-stack=32 -asan-force-dynamic-shadow -asan-mapping-scale=5 -S | FileCheck %s 10 11 12target 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" 13target triple = "x86_64-unknown-linux-gnu" 14 15%struct.A = type { [8 x i32] } 16 17declare i32 @bar(%struct.A*) 18 19; Test behavior for named argument with explicit alignment. The memcpy and 20; alloca alignments should match the explicit alignment of 64. 21define void @foo(%struct.A* byval(%struct.A) align 64 %a) sanitize_address { 22entry: 23; CHECK-LABEL: foo 24; CHECK: call i64 @__asan_stack_malloc 25; CHECK: alloca i8, i64 {{.*}} align 64 26; CHECK: [[copyPtr:%[^ \t]+]] = inttoptr i64 %{{[^ \t]+}} to %struct.A* 27; CHECK: [[copyBytePtr:%[^ \t]+]] = bitcast %struct.A* [[copyPtr]] 28; CHECK: [[aBytePtr:%[^ \t]+]] = bitcast %struct.A* %a 29; CHECK: call void @llvm.memcpy{{[^%]+}}[[copyBytePtr]]{{[^%]+}} align 64 [[aBytePtr]],{{[^,]+}}, 30; CHECK: call i32 @bar(%struct.A* [[copyPtr]]) 31; CHECK: ret void 32 33 %call = call i32 @bar(%struct.A* %a) 34 ret void 35} 36 37; Test behavior for unnamed argument without explicit alignment. In this case, 38; the first argument is referenced by the identifier %0 and the ABI requires a 39; minimum alignment of 4 bytes since struct.A contains i32s which have 4-byte 40; alignment. However, the alloca alignment will be 32 since that is the value 41; passed via the -asan-realign-stack option, which is greater than 4. 42define void @baz(%struct.A* byval(%struct.A)) sanitize_address { 43entry: 44; CHECK-LABEL: baz 45; CHECK: call i64 @__asan_stack_malloc 46; CHECK: alloca i8, i64 {{.*}} align 32 47; CHECK: [[copyPtr:%[^ \t]+]] = inttoptr i64 %{{[^ \t]+}} to %struct.A* 48; CHECK: [[copyBytePtr:%[^ \t]+]] = bitcast %struct.A* [[copyPtr]] 49; CHECK: [[aBytePtr:%[^ \t]+]] = bitcast %struct.A* %0 50; CHECK: call void @llvm.memcpy{{[^%]+}}[[copyBytePtr]]{{[^%]+}} align 4 [[aBytePtr]],{{[^,]+}} 51; CHECK: call i32 @bar(%struct.A* [[copyPtr]]) 52; CHECK: ret void 53 54 %call = call i32 @bar(%struct.A* %0) 55 ret void 56} 57