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