File: 2004-09-20-BadLoadCombine.ll

package info (click to toggle)
swiftlang 6.0.3-2
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 2,519,992 kB
  • sloc: cpp: 9,107,863; ansic: 2,040,022; asm: 1,135,751; python: 296,500; objc: 82,456; f90: 60,502; lisp: 34,951; pascal: 19,946; sh: 18,133; perl: 7,482; ml: 4,937; javascript: 4,117; makefile: 3,840; awk: 3,535; xml: 914; fortran: 619; cs: 573; ruby: 573
file content (18 lines) | stat: -rw-r--r-- 665 bytes parent folder | download | duplicates (14)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
; RUN: opt < %s -passes='function(instcombine),function(mem2reg)' -S | \
; RUN:   not grep "i32 1"

; When propagating the load through the select, make sure that the load is
; inserted where the original load was, not where the select is.  Not doing
; so could produce incorrect results!

define i32 @test(i1 %C) {
        %X = alloca i32         ; <ptr> [#uses=3]
        %X2 = alloca i32                ; <ptr> [#uses=2]
        store i32 1, ptr %X
        store i32 2, ptr %X2
        %Y = select i1 %C, ptr %X, ptr %X2            ; <ptr> [#uses=1]
        store i32 3, ptr %X
        %Z = load i32, ptr %Y               ; <i32> [#uses=1]
        ret i32 %Z
}