mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-21 03:53:04 +02:00
91fd65c3a6
Summary: The `"patchable-function"` attribute can be used by an LLVM client to influence LLVM's code generation in ways that makes the generated code easily patchable at runtime (for instance, to redirect control). Right now only one patchability scheme is supported, `"prologue-short-redirect"`, but this can be expanded in the future. Reviewers: joker.eph, rnk, echristo, dberris Subscribers: joker.eph, echristo, mcrosier, llvm-commits Differential Revision: http://reviews.llvm.org/D19046 llvm-svn: 266715
44 lines
1.1 KiB
LLVM
44 lines
1.1 KiB
LLVM
; RUN: llc -filetype=obj -o - -mtriple=x86_64-apple-macosx < %s | llvm-objdump -triple x86_64-apple-macosx -disassemble - | FileCheck %s
|
|
; RUN: llc -mtriple=x86_64-apple-macosx < %s | FileCheck %s --check-prefix=CHECK-ALIGN
|
|
|
|
declare void @callee(i64*)
|
|
|
|
define void @f0() "patchable-function"="prologue-short-redirect" {
|
|
; CHECK-LABEL: _f0:
|
|
; CHECK-NEXT: 66 90 nop
|
|
|
|
; CHECK-ALIGN: .p2align 4, 0x90
|
|
; CHECK-ALIGN: _f0:
|
|
|
|
ret void
|
|
}
|
|
|
|
define void @f1() "patchable-function"="prologue-short-redirect" "no-frame-pointer-elim"="true" {
|
|
; CHECK-LABEL: _f1
|
|
; CHECK-NEXT: ff f5 pushq %rbp
|
|
|
|
; CHECK-ALIGN: .p2align 4, 0x90
|
|
; CHECK-ALIGN: _f1:
|
|
ret void
|
|
}
|
|
|
|
define void @f2() "patchable-function"="prologue-short-redirect" {
|
|
; CHECK-LABEL: _f2
|
|
; CHECK-NEXT: 48 81 ec a8 00 00 00 subq $168, %rsp
|
|
|
|
; CHECK-ALIGN: .p2align 4, 0x90
|
|
; CHECK-ALIGN: _f2:
|
|
%ptr = alloca i64, i32 20
|
|
call void @callee(i64* %ptr)
|
|
ret void
|
|
}
|
|
|
|
define void @f3() "patchable-function"="prologue-short-redirect" optsize {
|
|
; CHECK-LABEL: _f3
|
|
; CHECK-NEXT: 66 90 nop
|
|
|
|
; CHECK-ALIGN: .p2align 4, 0x90
|
|
; CHECK-ALIGN: _f3:
|
|
ret void
|
|
}
|