File: udiv-simplify-bug-1.ll

package info (click to toggle)
llvm-3.0 3.0-10
  • links: PTS, VCS
  • area: main
  • in suites: wheezy
  • size: 75,412 kB
  • sloc: cpp: 468,043; asm: 109,345; ansic: 13,782; sh: 12,935; ml: 4,716; python: 4,351; perl: 2,096; makefile: 1,905; pascal: 1,578; exp: 389; xml: 283; lisp: 187; csh: 117
file content (20 lines) | stat: -rw-r--r-- 481 bytes parent folder | download | duplicates (5) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
 
; RUN: opt < %s -instcombine -S > %t1.ll
; RUN: grep udiv %t1.ll | count 2
; RUN: grep zext %t1.ll | count 2
; PR2274

; The udiv instructions shouldn't be optimized away, and the
; sext instructions should be optimized to zext.

define i64 @bar(i32 %x) nounwind {
  %y = lshr i32 %x, 30
  %r = udiv i32 %y, 3
  %z = sext i32 %r to i64
  ret i64 %z
}
define i64 @qux(i32 %x, i32 %v) nounwind {
  %y = lshr i32 %x, 31
  %r = udiv i32 %y, %v
  %z = sext i32 %r to i64
  ret i64 %z
}