File: 2002-05-15-SubReassociate.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 (12 lines) | stat: -rw-r--r-- 367 bytes parent folder | download | duplicates (5) 
1
2
3
4
5
6
7
8
9
10
11
12
 
; With sub reassociation, constant folding can eliminate all of the constants.
;
; RUN: opt < %s -reassociate -constprop -instcombine -dce -S | not grep add

define i32 @test(i32 %A, i32 %B) {
	%W = add i32 5, %B		; <i32> [#uses=1]
	%X = add i32 -7, %A		; <i32> [#uses=1]
	%Y = sub i32 %X, %W		; <i32> [#uses=1]
	%Z = add i32 %Y, 12		; <i32> [#uses=1]
	ret i32 %Z
}