38 lines
902 B
LLVM
38 lines
902 B
LLVM
; RUN: llc -verify-machineinstrs < %s | FileCheck %s
|
|
target triple = "x86_64-pc-win32"
|
|
|
|
declare i64 @llvm.x86.flags.read.u64()
|
|
declare void @llvm.x86.flags.write.u64(i64)
|
|
|
|
define i64 @read_flags() {
|
|
entry:
|
|
%flags = call i64 @llvm.x86.flags.read.u64()
|
|
ret i64 %flags
|
|
}
|
|
|
|
; CHECK-LABEL: read_flags:
|
|
; CHECK: pushq %rbp
|
|
; CHECK: .seh_pushreg %rbp
|
|
; CHECK: movq %rsp, %rbp
|
|
; CHECK: .seh_setframe %rbp, 0
|
|
; CHECK: .seh_endprologue
|
|
; CHECK-NEXT: pushfq
|
|
; CHECK-NEXT: popq %rax
|
|
; CHECK-NEXT: popq %rbp
|
|
|
|
define void @write_flags(i64 %arg) {
|
|
entry:
|
|
call void @llvm.x86.flags.write.u64(i64 %arg)
|
|
ret void
|
|
}
|
|
|
|
; CHECK-LABEL: write_flags:
|
|
; CHECK: pushq %rbp
|
|
; CHECK: .seh_pushreg %rbp
|
|
; CHECK: movq %rsp, %rbp
|
|
; CHECK: .seh_setframe %rbp, 0
|
|
; CHECK: .seh_endprologue
|
|
; CHECK-NEXT: pushq %rcx
|
|
; CHECK-NEXT: popfq
|
|
; CHECK-NEXT: popq %rbp
|