File: 2003-08-12-AllocaNonNull.ll

package info (click to toggle)
llvm-toolchain-4.0 1%3A4.0.1-10~deb9u2
  • links: PTS, VCS
  • area: main
  • in suites: stretch
  • size: 493,332 kB
  • sloc: cpp: 2,698,100; ansic: 552,773; asm: 128,821; python: 121,589; objc: 105,054; sh: 21,174; lisp: 6,758; ml: 5,532; perl: 5,311; pascal: 5,245; makefile: 2,083; cs: 1,868; xml: 686; php: 212; csh: 117
file content (21 lines) | stat: -rw-r--r-- 655 bytes parent folder | download | duplicates (15)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
; This testcase can be simplified by "realizing" that alloca can never return
; null.
; RUN: opt < %s -instcombine -simplifycfg -S | FileCheck %s
; CHECK-NOT: br

declare i32 @bitmap_clear(...)

define i32 @oof() {
entry:
        %live_head = alloca i32         ; <i32*> [#uses=2]
        %tmp.1 = icmp ne i32* %live_head, null          ; <i1> [#uses=1]
        br i1 %tmp.1, label %then, label %UnifiedExitNode

then:           ; preds = %entry
        %tmp.4 = call i32 (...) @bitmap_clear( i32* %live_head )               ; <i32> [#uses=0]
        br label %UnifiedExitNode

UnifiedExitNode:                ; preds = %then, %entry
        ret i32 0
}