File: volatile_store.ll

package info (click to toggle)
llvm-toolchain-20 1%3A20.1.8-1
  • links: PTS, VCS
  • area: main
  • in suites: experimental
  • size: 2,111,696 kB
  • sloc: cpp: 7,438,781; ansic: 1,393,871; asm: 1,012,926; python: 241,771; f90: 86,635; objc: 75,411; lisp: 42,144; pascal: 17,286; sh: 8,596; ml: 5,082; perl: 4,730; makefile: 3,591; awk: 3,523; javascript: 2,251; xml: 892; fortran: 672
file content (41 lines) | stat: -rw-r--r-- 1,034 bytes parent folder | download | duplicates (18) 
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
 
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes=instcombine -S | FileCheck %s

@x = weak global i32 0

define void @self_assign_1() {
; CHECK-LABEL: @self_assign_1(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TMP:%.*]] = load volatile i32, ptr @x, align 4
; CHECK-NEXT:    store volatile i32 [[TMP]], ptr @x, align 4
; CHECK-NEXT:    br label [[RETURN:%.*]]
; CHECK:       return:
; CHECK-NEXT:    ret void
;
entry:
  %tmp = load volatile i32, ptr @x
  store volatile i32 %tmp, ptr @x
  br label %return

return:
  ret void
}

define void @volatile_store_before_unreachable(i1 %c, ptr %p) {
; CHECK-LABEL: @volatile_store_before_unreachable(
; CHECK-NEXT:    br i1 [[C:%.*]], label [[TRUE:%.*]], label [[FALSE:%.*]]
; CHECK:       true:
; CHECK-NEXT:    store volatile i8 0, ptr [[P:%.*]], align 1
; CHECK-NEXT:    unreachable
; CHECK:       false:
; CHECK-NEXT:    ret void
;
  br i1 %c, label %true, label %false

true:
  store volatile i8 0, ptr %p
  unreachable

false:
  ret void
}