42 lines
1.5 KiB
LLVM
42 lines
1.5 KiB
LLVM
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; RUN: llc --frame-pointer=all -mtriple=aarch64-- < %s | FileCheck %s
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; PR25610: -fstack-protector places the canary in the wrong place on arm64 with
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; va_args
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%struct.__va_list = type { i8*, i8*, i8*, i32, i32 }
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; CHECK-LABEL: test
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; CHECK: ldr [[GUARD:x[0-9]+]]{{.*}}:lo12:__stack_chk_guard]
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; Make sure the canary is placed relative to the frame pointer, not
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; the stack pointer.
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; CHECK: stur [[GUARD]], [x29, #-8]
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define void @test(i8* %i, ...) #0 {
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entry:
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%buf = alloca [10 x i8], align 1
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%ap = alloca %struct.__va_list, align 8
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%tmp = alloca %struct.__va_list, align 8
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%0 = getelementptr inbounds [10 x i8], [10 x i8]* %buf, i64 0, i64 0
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call void @llvm.lifetime.start(i64 10, i8* %0)
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%1 = bitcast %struct.__va_list* %ap to i8*
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call void @llvm.lifetime.start(i64 32, i8* %1)
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call void @llvm.va_start(i8* %1)
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%2 = bitcast %struct.__va_list* %tmp to i8*
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call void @llvm.memcpy.p0i8.p0i8.i64(i8* %2, i8* %1, i64 32, i32 8, i1 false)
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call void @baz(i8* %i, %struct.__va_list* nonnull %tmp)
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call void @bar(i8* %0)
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call void @llvm.va_end(i8* %1)
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call void @llvm.lifetime.end(i64 32, i8* %1)
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call void @llvm.lifetime.end(i64 10, i8* %0)
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ret void
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}
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declare void @llvm.lifetime.start(i64, i8* nocapture)
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declare void @llvm.va_start(i8*)
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declare void @baz(i8*, %struct.__va_list*)
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declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture readonly, i64, i32, i1)
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declare void @bar(i8*)
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declare void @llvm.va_end(i8*)
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declare void @llvm.lifetime.end(i64, i8* nocapture)
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attributes #0 = { noinline nounwind optnone ssp }
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