maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity
llvm-project/llvm/test/CodeGen/X86/safestack_inline.ll

Ignoring revisions in .git-blame-ignore-revs. Click here to bypass and see the normal blame view.

31 lines
917 B
LLVM
Raw Normal View History

[safestack] Inline safestack pointer access when possible. Summary: This adds an -mllvm flag that forces the use of a runtime function call to get the unsafe stack pointer, the same that is currently used on non-x86, non-aarch64 android. The call may be inlined. Reviewers: pcc Subscribers: aemerson, kristof.beyls, hiraditya, llvm-commits Differential Revision: https://reviews.llvm.org/D37405 llvm-svn: 323259
2018-01-24 05:27:07 +08:00
; RUN: sed -e "s/ATTR//" %s | llc -mtriple=x86_64-linux -safestack-use-pointer-address | FileCheck --check-prefix=INLINE %s
; RUN: sed -e "s/ATTR/noinline/" %s | llc -mtriple=x86_64-linux -safestack-use-pointer-address | FileCheck --check-prefix=CALL %s
@p = external thread_local global i8*, align 8
define nonnull i8** @__safestack_pointer_address() local_unnamed_addr ATTR {
entry:
ret i8** @p
}
define void @_Z1fv() safestack {
entry:
%x = alloca i32, align 4
%0 = bitcast i32* %x to i8*
call void @_Z7CapturePi(i32* nonnull %x)
ret void
}
declare void @_Z7CapturePi(i32*)
; INLINE: movq p@GOTTPOFF(%rip), %[[A:.*]]
; INLINE: movq %fs:(%[[A]]), %[[B:.*]]
; INLINE: leaq -16(%[[B]]), %[[C:.*]]
; INLINE: movq %[[C]], %fs:(%[[A]])
; CALL: callq __safestack_pointer_address
; CALL: movq %rax, %[[A:.*]]
Re-enable "[MachineCopyPropagation] Extend pass to do COPY source forwarding" Re-enable commit r323991 now that r325931 has been committed to make MachineOperand::isRenamable() check more conservative w.r.t. code changes and opt-in on a per-target basis. llvm-svn: 326208
2018-02-28 00:59:10 +08:00
; CALL: movq (%rax), %[[B:.*]]
[safestack] Inline safestack pointer access when possible. Summary: This adds an -mllvm flag that forces the use of a runtime function call to get the unsafe stack pointer, the same that is currently used on non-x86, non-aarch64 android. The call may be inlined. Reviewers: pcc Subscribers: aemerson, kristof.beyls, hiraditya, llvm-commits Differential Revision: https://reviews.llvm.org/D37405 llvm-svn: 323259
2018-01-24 05:27:07 +08:00
; CALL: leaq -16(%[[B]]), %[[C:.*]]
; CALL: movq %[[C]], (%[[A]])