File: stack-protector-musttail.ll

package info (click to toggle)
llvm-toolchain-14 1%3A14.0.6-12
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,496,180 kB
  • sloc: cpp: 5,593,972; ansic: 986,872; asm: 585,869; python: 184,223; objc: 72,530; lisp: 31,119; f90: 27,793; javascript: 9,780; pascal: 9,762; sh: 9,482; perl: 7,468; ml: 5,432; awk: 3,523; makefile: 2,538; xml: 953; cs: 573; fortran: 567
file content (56 lines) | stat: -rw-r--r-- 1,254 bytes parent folder | download | duplicates (7)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
; RUN: llc -mtriple=thumbv7-windows-msvc -fast-isel %s -o - -start-before=stack-protector -stop-after=stack-protector  | FileCheck %s

@var = global [2 x i64]* null

declare void @callee()

define void @caller1() sspreq {
; CHECK-LABEL: define void @caller1()
; Prologue:

; CHECK: call void @__security_check_cookie

; CHECK: musttail call void @callee()
; CHECK-NEXT: ret void
  %var = alloca [2 x i64]
  store [2 x i64]* %var, [2 x i64]** @var
  musttail call void @callee()
  ret void
}

define void @justret() sspreq {
; CHECK-LABEL: define void @justret()
; Prologue:
; CHECK: @llvm.stackguard

; CHECK: call void @__security_check_cookie

; CHECK: ret void
  %var = alloca [2 x i64]
  store [2 x i64]* %var, [2 x i64]** @var
  br label %retblock

retblock:
  ret void
}


declare i64* @callee2()

define i8* @caller2() sspreq {
; CHECK-LABEL: define i8* @caller2()
; Prologue:
; CHECK: @llvm.stackguard

; CHECK: call void @__security_check_cookie

; CHECK: [[TMP:%.*]] = musttail call i64* @callee2()
; CHECK-NEXT: [[RES:%.*]] = bitcast i64* [[TMP]] to i8*
; CHECK-NEXT: ret i8* [[RES]]

  %var = alloca [2 x i64]
  store [2 x i64]* %var, [2 x i64]** @var
  %tmp = musttail call i64* @callee2()
  %res = bitcast i64* %tmp to i8*
  ret i8* %res
}