File: 2007-02-04-OrAddrMode.ll

package info (click to toggle)
swiftlang 6.1.3-2
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid
  • size: 2,791,604 kB
  • sloc: cpp: 9,901,740; ansic: 2,201,431; asm: 1,091,827; python: 308,252; objc: 82,166; f90: 80,126; lisp: 38,358; pascal: 25,559; sh: 20,429; ml: 5,058; perl: 4,745; makefile: 4,484; awk: 3,535; javascript: 3,018; xml: 918; fortran: 664; cs: 573; ruby: 396
file content (28 lines) | stat: -rw-r--r-- 679 bytes parent folder | download | duplicates (18) 
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
 
; RUN: llc < %s -mtriple=i686-- | FileCheck %s

;; This example can't fold the or into an LEA.
define i32 @test(ptr %tmp2, i32 %tmp12) nounwind {
; CHECK-LABEL: test:
; CHECK-NOT: ret
; CHECK: orl $1, %{{.*}}
; CHECK: ret

	%tmp3 = load ptr, ptr %tmp2
	%tmp132 = shl i32 %tmp12, 2		; <i32> [#uses=1]
	%ctg2 = getelementptr i8, ptr %tmp3, i32 %tmp132		; <ptr> [#uses=1]
	%tmp6 = ptrtoint ptr %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 {
; CHECK-LABEL: test2:
; CHECK-NOT: ret
; CHECK: leal 3(,%{{.*}},8)
; CHECK: ret

	%c = shl i32 %a, 3
	%d = or i32 %c, 3
	ret i32 %d
}