File: 2003-04-18-DeadBlockProblem.ll

package info (click to toggle)
llvm-toolchain-19 1%3A19.1.7-3
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 1,998,520 kB
  • sloc: cpp: 6,951,680; ansic: 1,486,157; asm: 913,598; python: 232,024; f90: 80,126; objc: 75,281; lisp: 37,276; pascal: 16,990; sh: 10,009; ml: 5,058; perl: 4,724; awk: 3,523; makefile: 3,167; javascript: 2,504; xml: 892; fortran: 664; cs: 573
file content (26 lines) | stat: -rw-r--r-- 744 bytes parent folder | download | duplicates (12) 
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
 
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; This testcases makes sure that mem2reg can handle unreachable blocks.
; RUN: opt < %s -passes=mem2reg -S | FileCheck %s

define i32 @test() {
; CHECK-LABEL: @test(
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       Loop:
; CHECK-NEXT:    br label [[ENDOFLOOP:%.*]]
; CHECK:       Unreachable:
; CHECK-NEXT:    br label [[ENDOFLOOP]]
; CHECK:       EndOfLoop:
; CHECK-NEXT:    br label [[LOOP]]
;
  %X = alloca i32		; <ptr> [#uses=2]
  store i32 6, ptr %X
  br label %Loop
Loop:		; preds = %EndOfLoop, %0
  store i32 5, ptr %X
  br label %EndOfLoop
Unreachable:		; No predecessors!
  br label %EndOfLoop
EndOfLoop:		; preds = %Unreachable, %Loop
  br label %Loop
}