File: global-variable-alignment.ll

package info (click to toggle)
llvm-toolchain-20 1%3A20.1.6-1~exp1
  • links: PTS, VCS
  • area: main
  • in suites: experimental
  • size: 2,111,304 kB
  • sloc: cpp: 7,438,677; ansic: 1,393,822; asm: 1,012,926; python: 241,650; f90: 86,635; objc: 75,479; lisp: 42,144; pascal: 17,286; sh: 10,027; ml: 5,082; perl: 4,730; awk: 3,523; makefile: 3,349; javascript: 2,251; xml: 892; fortran: 672
file content (27 lines) | stat: -rw-r--r-- 750 bytes parent folder | download | duplicates (10) 
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
 
; Check that lli respects alignment on global variables.
;
; Returns ((uint32_t)&B & 0x7) - A + C. Variables A and C have byte-alignment,
; and are intended to increase the chance of misalignment, but don't contribute
; to the result, since they have the same initial value.
;
; A failure may indicate a problem with alignment handling in the JIT linker or
; JIT memory manager.
;
; RUN: %lli %s

@A = internal global i8 1, align 1
@B = global i64 1, align 8
@C = internal global i8 1, align 1

define i32 @main(i32 %argc, i8** %argv) {
entry:
  %0 = ptrtoint i8* @B to i32
  %1 = and i32 %0, 7
  %2 = load i8, i8* @A
  %3 = zext i8 %2 to i32
  %4 = add i32 %1, %3
  %5 = load i8, i8* @C
  %6 = zext i8 %5 to i32
  %7 = sub i32 %4, %6
  ret i32 %7
}