File: phi-in-dead-block.ll

package info (click to toggle)
llvm-toolchain-6.0 1%3A6.0.1-10
  • links: PTS, VCS
  • area: main
  • in suites: buster
  • size: 598,080 kB
  • sloc: cpp: 3,046,253; ansic: 595,057; asm: 271,965; python: 128,926; objc: 106,554; sh: 21,906; lisp: 10,191; pascal: 6,094; ml: 5,544; perl: 5,265; makefile: 2,227; cs: 2,027; xml: 686; php: 212; csh: 117
file content (40 lines) | stat: -rw-r--r-- 1,056 bytes parent folder | download | duplicates (14) 
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 -lowerswitch %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
}