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1; This check verifies that arguments passed by value get redzones.2; RUN: opt < %s -passes=asan -asan-realign-stack=32 -S | FileCheck %s3; RUN: opt < %s -passes=asan -asan-realign-stack=32 -asan-force-dynamic-shadow -S | FileCheck %s4; RUN: opt < %s -passes=asan -asan-realign-stack=32 -asan-mapping-scale=5 -S | FileCheck %s5; RUN: opt < %s -passes=asan -asan-realign-stack=32 -asan-force-dynamic-shadow -asan-mapping-scale=5 -S | FileCheck %s6 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(ptr)14 15; Test behavior for named argument with explicit alignment. The memcpy and16; alloca alignments should match the explicit alignment of 64.17define void @foo(ptr byval(%struct.A) align 64 %a) sanitize_address {18entry:19; CHECK-LABEL: foo20; CHECK: call i64 @__asan_stack_malloc21; CHECK: alloca i8, i64 {{.*}} align 6422; CHECK: call void @llvm.memcpy{{[^%]+}}[[copyPtr:%[0-9]+]]{{[^%]+}} align 64 %a,{{[^,]+}},23; CHECK: call i32 @bar(ptr [[copyPtr]])24; CHECK: ret void25 26 %call = call i32 @bar(ptr %a)27 ret void28}29 30; Test behavior for unnamed argument without explicit alignment. In this case,31; the first argument is referenced by the identifier %0 and the ABI requires a32; minimum alignment of 4 bytes since struct.A contains i32s which have 4-byte33; alignment. However, the alloca alignment will be 32 since that is the value34; passed via the -asan-realign-stack option, which is greater than 4.35define void @baz(ptr byval(%struct.A)) sanitize_address {36entry:37; CHECK-LABEL: baz38; CHECK: call i64 @__asan_stack_malloc39; CHECK: alloca i8, i64 {{.*}} align 3240; CHECK: call void @llvm.memcpy{{[^%]+}}[[copyPtr:%[0-9]+]]{{[^%]+}} align 4 %0,{{[^,]+}}41; CHECK: call i32 @bar(ptr [[copyPtr]])42; CHECK: ret void43 44 %call = call i32 @bar(ptr %0)45 ret void46}47