File: 2009-09-24-byval-ptr.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 (40 lines) | stat: -rw-r--r-- 1,385 bytes parent folder | download | duplicates (5)
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
29
30
31
32
33
34
35
36
37
38
39
40
; RUN: llvm-as <%s | opt -ipsccp | llvm-dis | FileCheck %s
; Don't constant-propagate byval pointers, since they are not pointers!
; PR5038
%struct.MYstr = type { i8, i32 }
@mystr = internal global %struct.MYstr zeroinitializer ; <%struct.MYstr*> [#uses=3]
define internal void @vfu1(%struct.MYstr* byval align 4 %u) nounwind {
entry:
  %0 = getelementptr %struct.MYstr* %u, i32 0, i32 1 ; <i32*> [#uses=1]
  store i32 99, i32* %0, align 4
; CHECK: %struct.MYstr* %u
  %1 = getelementptr %struct.MYstr* %u, i32 0, i32 0 ; <i8*> [#uses=1]
  store i8 97, i8* %1, align 4
; CHECK: %struct.MYstr* %u
  br label %return

return:                                           ; preds = %entry
  ret void
}

define internal i32 @vfu2(%struct.MYstr* byval align 4 %u) nounwind readonly {
entry:
  %0 = getelementptr %struct.MYstr* %u, i32 0, i32 1 ; <i32*> [#uses=1]
  %1 = load i32* %0
; CHECK: load i32* getelementptr inbounds (%struct.MYstr* @mystr, i32 0, i32 1)
  %2 = getelementptr %struct.MYstr* %u, i32 0, i32 0 ; <i8*> [#uses=1]
  %3 = load i8* %2
; CHECK: load i8* getelementptr inbounds (%struct.MYstr* @mystr, i32 0, i32 0)
  %4 = zext i8 %3 to i32
  %5 = add i32 %4, %1
  ret i32 %5
}

define i32 @unions() nounwind {
entry:
  call void @vfu1(%struct.MYstr* byval align 4 @mystr) nounwind
  %result = call i32 @vfu2(%struct.MYstr* byval align 4 @mystr) nounwind

  ret i32 %result
}