File: 2008-07-17-addrspace.ll

package info (click to toggle)
llvm 2.6-9.1
  • links: PTS
  • area: main
  • in suites: squeeze
  • size: 57,604 kB
  • ctags: 44,336
  • sloc: cpp: 344,766; sh: 12,407; ansic: 10,617; ada: 3,070; ml: 2,505; perl: 2,496; makefile: 1,426; pascal: 1,163; exp: 389; asm: 307; python: 298; objc: 260; lisp: 182; csh: 117; xml: 38; f90: 36; tcl: 20
file content (28 lines) | stat: -rw-r--r-- 1,155 bytes parent folder | download
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
; This test lets globalopt split the global struct and array into different
; values. This used to crash, because globalopt forgot to put the new var in the
; same address space as the old one.

; RUN: llvm-as < %s | opt -globalopt | llvm-dis > %t
; Check that the new global values still have their address space
; RUN: cat %t | grep global.*addrspace

@struct = internal addrspace(1) global { i32, i32 } zeroinitializer
@array = internal addrspace(1) global [ 2 x i32 ] zeroinitializer 

define i32 @foo() {
  %A = load i32 addrspace(1) * getelementptr ({ i32, i32 } addrspace(1) * @struct, i32 0, i32 0)
  %B = load i32 addrspace(1) * getelementptr ([ 2 x i32 ] addrspace(1) * @array, i32 0, i32 0)
  ; Use the loaded values, so they won't get removed completely
  %R = add i32 %A, %B
  ret i32 %R
}

; We put stores in a different function, so that the global variables won't get
; optimized away completely.
define void @bar(i32 %R) {
  store i32 %R, i32 addrspace(1) * getelementptr ([ 2 x i32 ] addrspace(1) * @array, i32 0, i32 0)
  store i32 %R, i32 addrspace(1) * getelementptr ({ i32, i32 } addrspace(1) * @struct, i32 0, i32 0)
  ret void
}