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/x86-interrupt_vzeroupper.ll

20 lines
528 B
LLVM
Raw Normal View History

[X86] Fix the AllRegs AVX calling convention. We used to list registers that were not in the AVX space. In other words, we were pushing registers that the ISA cannot encode (YMM16-YMM31). This is part of llvm.org/PR27481. llvm-svn: 268983
2016-05-10 06:37:05 +08:00
; RUN: llc -verify-machineinstrs -mtriple=x86_64-unknown-unknown -mattr=+avx < %s | FileCheck %s
Disallow generating vzeroupper before return instruction (iret) in interrupt handler function. This resolves https://llvm.org/bugs/show_bug.cgi?id=26412 Differential Revision: http://reviews.llvm.org/D17542 llvm-svn: 262319
2016-03-01 19:32:03 +08:00
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Checks that interrupt handler code does not call "vzeroupper" instruction
;; before iret.
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; CHECK: vzeroupper
; CHECK-NEXT: call
; CHECK-NOT: vzeroupper
; CHECK: iret
define x86_intrcc void @foo(i8* %frame) {
call void @bar()
ret void
}
declare void @bar()