File: DeadSetCC.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 (28 lines) | stat: -rw-r--r-- 783 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
 
; RUN: opt < %s -simplifycfg -S | \
; RUN:   not grep "icmp eq"

; Check that simplifycfg deletes a dead 'seteq' instruction when it
; folds a conditional branch into a switch instruction.

declare void @foo()

declare void @bar()

define void @testcfg(i32 %V) {
        %C = icmp eq i32 %V, 18         ; <i1> [#uses=1]
        %D = icmp eq i32 %V, 180                ; <i1> [#uses=1]
        %E = or i1 %C, %D               ; <i1> [#uses=1]
        br i1 %E, label %L1, label %Sw
Sw:             ; preds = %0
        switch i32 %V, label %L1 [
                 i32 15, label %L2
                 i32 16, label %L2
        ]
L1:             ; preds = %Sw, %0
        call void @foo( )
        ret void
L2:             ; preds = %Sw, %Sw
        call void @bar( )
        ret void
}