File: pr21891.ll

package info (click to toggle)
llvm-toolchain-3.7 1%3A3.7.1-5
  • links: PTS, VCS
  • area: main
  • in suites: stretch
  • size: 345,556 kB
  • ctags: 362,199
  • sloc: cpp: 2,156,381; ansic: 458,339; objc: 91,547; python: 89,988; asm: 86,305; sh: 21,479; makefile: 6,853; perl: 5,601; ml: 5,458; pascal: 3,933; lisp: 2,429; xml: 686; cs: 239; php: 202; csh: 117
file content (18 lines) | stat: -rw-r--r-- 485 bytes parent folder | download | duplicates (15) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
 
; RUN: opt %s -instcombine

define i32 @f(i32 %theNumber) {
entry:
  %cmp = icmp sgt i32 %theNumber, -1
  call void @llvm.assume(i1 %cmp)
  br i1 true, label %if.then, label %if.end

if.then:                                          ; preds = %entry
  %shl = shl nuw i32 %theNumber, 1
  br label %if.end

if.end:                                           ; preds = %if.then, %entry
  %phi = phi i32 [ %shl, %if.then ], [ undef, %entry ]
  ret i32 %phi
}

declare void @llvm.assume(i1)