File: pr40992-indirectbr-folding.ll

package info (click to toggle)
llvm-toolchain-11 1%3A11.0.1-2
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 995,808 kB
  • sloc: cpp: 4,767,656; ansic: 760,916; asm: 477,436; python: 170,940; objc: 69,804; lisp: 29,914; sh: 23,855; f90: 18,173; pascal: 7,551; perl: 7,471; ml: 5,603; awk: 3,489; makefile: 2,573; xml: 915; cs: 573; fortran: 503; javascript: 452
file content (44 lines) | stat: -rw-r--r-- 849 bytes parent folder | download | duplicates (11) 
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
 
; RUN: opt -S < %s -jump-threading | FileCheck %s

; PR40992: Do not incorrectly fold %bb5 into an unconditional br to %bb7.
;          Also verify we correctly thread %bb1 -> %bb7 when %c is false.

define i32 @jtbr(i1 %v1, i1 %v2, i1 %v3) {
; CHECK: bb0:
bb0:
  br label %bb1

; CHECK: bb1:
; CHECK-NEXT: and
; CHECK-NEXT: br i1 %c, label %bb2, label %bb7
bb1:
  %c = and i1 %v1, %v2
  br i1 %c, label %bb2, label %bb5

; CHECK: bb2:
; CHECK-NEXT: select
; CHECK-NEXT: indirectbr i8* %ba, [label %bb3, label %bb5]
bb2:
  %ba = select i1 %v3, i8* blockaddress(@jtbr, %bb3), i8* blockaddress(@jtbr, %bb4)
  indirectbr i8* %ba, [label %bb3, label %bb4]

; CHECK: bb3:
bb3:
  br label %bb1

; CHECK-NOT: bb4:
bb4:
  br label %bb5

; CHECK: bb5:
bb5:
  br i1 %c, label %bb6, label %bb7

; CHECK: bb6:
bb6:
  ret i32 0

; CHECK: bb7:
bb7:
  ret i32 1
}