File: gep-alias.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 (17 lines) | stat: -rw-r--r-- 756 bytes parent folder | download | duplicates (5) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
 
; RUN: opt -passes=instcombine -S -o - %s | FileCheck %s
; Test that we don't replace an alias with its aliasee when simplifying GEPs.
; In this test case the transformation is invalid because it replaces the
; reference to the symbol "b" (which refers to whichever instance of "b"
; was chosen by the linker) with a reference to "a" (which refers to the
; specific instance of "b" in this module).

target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

@a = internal global [3 x ptr] zeroinitializer
@b = linkonce_odr alias [3 x ptr], ptr @a

define ptr @f() {
  ; CHECK: ret ptr getelementptr ([3 x ptr], ptr @b, i64 0, i64 1)
  ret ptr getelementptr ([3 x ptr], ptr @b, i64 0, i64 1)
}