File: gep-alias.ll

package info (click to toggle)
llvm-toolchain-18 1%3A18.1.8-18
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 1,908,340 kB
  • sloc: cpp: 6,667,937; ansic: 1,440,452; asm: 883,619; python: 230,549; objc: 76,880; f90: 74,238; lisp: 35,989; pascal: 16,571; sh: 10,229; perl: 7,459; ml: 5,047; awk: 3,523; makefile: 2,987; javascript: 2,149; xml: 892; fortran: 649; cs: 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)
}