File: phi-in-dead-block.ll

package info (click to toggle)
swiftlang 6.1.3-2
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid
  • size: 2,791,604 kB
  • sloc: cpp: 9,901,740; ansic: 2,201,431; asm: 1,091,827; python: 308,252; objc: 82,166; f90: 80,126; lisp: 38,358; pascal: 25,559; sh: 20,429; ml: 5,058; perl: 4,745; makefile: 4,484; awk: 3,535; javascript: 3,018; xml: 918; fortran: 664; cs: 573; ruby: 396
file content (40 lines) | stat: -rw-r--r-- 1,064 bytes parent folder | download | duplicates (4) 
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
 
; RUN: opt -S -passes=lower-switch %s | FileCheck %s

; CHECK-LABEL: @phi_in_dead_block(
; CHECK-NOT: switch
define void @phi_in_dead_block() {
bb:
  br i1 undef, label %bb2, label %bb3

bb1:                                              ; No predecessors!
  switch i32 undef, label %bb2 [
    i32 9, label %bb3
  ]

bb2:                                              ; preds = %bb1, %bb
  %tmp = phi i64 [ undef, %bb1 ], [ undef, %bb ]
  unreachable

bb3:                                              ; preds = %bb1, %bb
  unreachable
}

; CHECK-LABEL: @phi_in_dead_block_br_to_self(
; CHECK-NOT: switch
define void @phi_in_dead_block_br_to_self() {
bb:
  br i1 undef, label %bb2, label %bb3

bb1:                                              ; No predecessors!
  switch i32 undef, label %bb2 [
    i32 9, label %bb3
    i32 10, label %bb1
  ]

bb2:                                              ; preds = %bb1, %bb
  %tmp = phi i64 [ undef, %bb1 ], [ undef, %bb ]
  unreachable

bb3:                                              ; preds = %bb1, %bb
  unreachable
}