File: unaligned_load.ll

package info (click to toggle)
llvm-2.7 2.7-6
  • links: PTS
  • area: main
  • in suites: squeeze
  • size: 59,992 kB
  • ctags: 49,499
  • sloc: cpp: 373,792; ansic: 16,885; sh: 12,614; asm: 6,809; ada: 3,083; ml: 2,942; python: 2,671; perl: 2,404; makefile: 1,691; pascal: 1,235; exp: 399; objc: 291; lisp: 184; csh: 117; xml: 38; f90: 36
file content (31 lines) | stat: -rw-r--r-- 875 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
 
; RUN: llc < %s -march=xcore > %t1.s
; RUN: grep "bl __misaligned_load" %t1.s | count 1
; RUN: grep ld16s %t1.s | count 2
; RUN: grep ldw %t1.s | count 2
; RUN: grep shl %t1.s | count 2
; RUN: grep shr %t1.s | count 1
; RUN: grep zext %t1.s | count 1
; RUN: grep "or " %t1.s | count 2

; Byte aligned load. Expands to call to __misaligned_load.
define i32 @align1(i32* %p) nounwind {
entry:
	%0 = load i32* %p, align 1		; <i32> [#uses=1]
	ret i32 %0
}

; Half word aligned load. Expands to two 16bit loads.
define i32 @align2(i32* %p) nounwind {
entry:
	%0 = load i32* %p, align 2		; <i32> [#uses=1]
	ret i32 %0
}

@a = global [5 x i8] zeroinitializer, align 4

; Constant offset from word aligned base. Expands to two 32bit loads.
define i32 @align3() nounwind {
entry:
	%0 = load i32* bitcast (i8* getelementptr ([5 x i8]* @a, i32 0, i32 1) to i32*), align 1
	ret i32 %0
}