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53 lines
2.3 KiB
LLVM
53 lines
2.3 KiB
LLVM
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; This check verifies that arguments passed by value get redzones.
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; RUN: opt < %s -asan -asan-realign-stack=32 -S | FileCheck %s
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; RUN: opt < %s -asan -asan-realign-stack=32 -asan-force-dynamic-shadow -S | FileCheck %s
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; RUN: opt < %s -asan -asan-realign-stack=32 -asan-mapping-scale=5 -S | FileCheck %s
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; RUN: opt < %s -asan -asan-realign-stack=32 -asan-force-dynamic-shadow -asan-mapping-scale=5 -S | FileCheck %s
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target 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"
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target triple = "x86_64-unknown-linux-gnu"
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%struct.A = type { [8 x i32] }
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declare i32 @bar(%struct.A*)
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; Test behavior for named argument with explicit alignment. The memcpy and
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; alloca alignments should match the explicit alignment of 64.
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define void @foo(%struct.A* byval align 64 %a) sanitize_address {
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entry:
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; CHECK-LABEL: foo
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; CHECK: call i64 @__asan_stack_malloc
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; CHECK: alloca i8, i64 {{.*}} align 64
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; CHECK: [[copyPtr:%[^ \t]+]] = inttoptr i64 %{{[^ \t]+}} to %struct.A*
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; CHECK: [[copyBytePtr:%[^ \t]+]] = bitcast %struct.A* [[copyPtr]]
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; CHECK: [[aBytePtr:%[^ \t]+]] = bitcast %struct.A* %a
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; CHECK: call void @llvm.memcpy{{[^%]+}}[[copyBytePtr]]{{[^%]+}}[[aBytePtr]],{{[^,]+}}, i32 64
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; CHECK: call i32 @bar(%struct.A* [[copyPtr]])
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; CHECK: ret void
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%call = call i32 @bar(%struct.A* %a)
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ret void
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}
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; Test behavior for unnamed argument without explicit alignment. In this case,
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; the first argument is referenced by the identifier %0 and the ABI requires a
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; minimum alignment of 4 bytes since struct.A contains i32s which have 4-byte
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; alignment. However, the alloca alignment will be 32 since that is the value
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; passed via the -asan-realign-stack option, which is greater than 4.
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define void @baz(%struct.A* byval) sanitize_address {
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entry:
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; CHECK-LABEL: baz
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; CHECK: call i64 @__asan_stack_malloc
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; CHECK: alloca i8, i64 {{.*}} align 32
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; CHECK: [[copyPtr:%[^ \t]+]] = inttoptr i64 %{{[^ \t]+}} to %struct.A*
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; CHECK: [[copyBytePtr:%[^ \t]+]] = bitcast %struct.A* [[copyPtr]]
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; CHECK: [[aBytePtr:%[^ \t]+]] = bitcast %struct.A* %0
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; CHECK: call void @llvm.memcpy{{[^%]+}}[[copyBytePtr]]{{[^%]+}}[[aBytePtr]],{{[^,]+}}, i32 4
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; CHECK: call i32 @bar(%struct.A* [[copyPtr]])
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; CHECK: ret void
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%call = call i32 @bar(%struct.A* %0)
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ret void
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}
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