File: 2007-02-04-OrAddrMode.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 (21 lines) | stat: -rw-r--r-- 633 bytes parent folder | download | duplicates (2) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
 
; RUN: llc < %s -march=x86 | grep {orl	\$1, %eax}
; RUN: llc < %s -march=x86 | grep {leal	3(,%eax,8)}

;; This example can't fold the or into an LEA.
define i32 @test(float ** %tmp2, i32 %tmp12) nounwind {
	%tmp3 = load float** %tmp2
	%tmp132 = shl i32 %tmp12, 2		; <i32> [#uses=1]
	%tmp4 = bitcast float* %tmp3 to i8*		; <i8*> [#uses=1]
	%ctg2 = getelementptr i8* %tmp4, i32 %tmp132		; <i8*> [#uses=1]
	%tmp6 = ptrtoint i8* %ctg2 to i32		; <i32> [#uses=1]
	%tmp14 = or i32 %tmp6, 1		; <i32> [#uses=1]
	ret i32 %tmp14
}


;; This can!
define i32 @test2(i32 %a, i32 %b) nounwind {
	%c = shl i32 %a, 3
	%d = or i32 %c, 3
	ret i32 %d
}