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[AArch64] Add test for DWARF return address signing 

Summary: Patch by LukeCheeseman and pbarrio

Reviewers: samparker, chill

Subscribers: kristof.beyls, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D72835
This commit is contained in:
Pablo Barrio 2020-01-16 11:47:37 +00:00
parent 0bf434ccd5
commit a8ff6c0b09
1 changed files with 35 additions and 0 deletions
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35
llvm/test/CodeGen/AArch64/sign-return-address-cfi-negate-ra-state.ll Normal file
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; RUN: llc -mtriple=aarch64-none-eabi < %s | FileCheck --check-prefixes CHECK,CHECK-V8A %s
; RUN: llc -mtriple=aarch64-none-eabi -mattr=v8.3a < %s | FileCheck --check-prefixes CHECK,CHECK-V83A %s
; RUN: llc -mtriple=aarch64-none-eabi -filetype=obj -o - <%s | llvm-dwarfdump -v - | FileCheck --check-prefix=CHECK-DUMP %s
@.str = private unnamed_addr constant [15 x i8] c"some exception\00", align 1
@_ZTIPKc = external dso_local constant i8*
; CHECK: @_Z3fooi
; CHECK-V8A: hint #25
; CHECK-V83A: paciasp
; CHECK-NEXT: .cfi_negate_ra_state
; CHECK-NOT: .cfi_negate_ra_state
define dso_local i32 @_Z3fooi(i32 %x) #0 {
entry:
%retval = alloca i32, align 4
%x.addr = alloca i32, align 4
store i32 %x, i32* %x.addr, align 4
%exception = call i8* @__cxa_allocate_exception(i64 8) #1
%0 = bitcast i8* %exception to i8**
store i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str, i32 0, i32 0), i8** %0, align 16
call void @__cxa_throw(i8* %exception, i8* bitcast (i8** @_ZTIPKc to i8*), i8* null) #2
unreachable
return: ; No predecessors!
%1 = load i32, i32* %retval, align 4
ret i32 %1
}
declare dso_local i8* @__cxa_allocate_exception(i64)
declare dso_local void @__cxa_throw(i8*, i8*, i8*)
attributes #0 = { "sign-return-address"="all" }
;CHECK-DUMP: DW_CFA_AARCH64_negate_ra_state