File: 2006-11-10-ashr-miscompile.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 (9 lines) | stat: -rw-r--r-- 280 bytes parent folder | download | duplicates (28) 
1
2
3
4
5
6
7
8
9
 
; RUN: opt < %s -instcombine -S | grep lshr
; Verify this is not turned into -1.

define i32 @test(i8 %amt) {
        %shift.upgrd.1 = zext i8 %amt to i32            ; <i32> [#uses=1]
        %B = lshr i32 -1, %shift.upgrd.1                ; <i32> [#uses=1]
        ret i32 %B
}