File: 2007-10-10-EliminateMemCpy.ll

package info (click to toggle)
llvm 2.6-9.1
  • links: PTS
  • area: main
  • in suites: squeeze
  • size: 57,604 kB
  • ctags: 44,336
  • sloc: cpp: 344,766; sh: 12,407; ansic: 10,617; ada: 3,070; ml: 2,505; perl: 2,496; makefile: 1,426; pascal: 1,163; exp: 389; asm: 307; python: 298; objc: 260; lisp: 182; csh: 117; xml: 38; f90: 36; tcl: 20
file content (20 lines) | stat: -rw-r--r-- 670 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
 
; RUN: llvm-as < %s | opt -instcombine | llvm-dis | not grep call
; RUN: llvm-as < %s | opt -std-compile-opts | llvm-dis | not grep xyz

@.str = internal constant [4 x i8] c"xyz\00"		; <[4 x i8]*> [#uses=1]

define void @foo(i8* %P) {
entry:
	%P_addr = alloca i8*		; <i8**> [#uses=2]
	%"alloca point" = bitcast i32 0 to i32		; <i32> [#uses=0]
	store i8* %P, i8** %P_addr
	%tmp = load i8** %P_addr, align 4		; <i8*> [#uses=1]
	%tmp1 = getelementptr [4 x i8]* @.str, i32 0, i32 0		; <i8*> [#uses=1]
	call void @llvm.memcpy.i32( i8* %tmp, i8* %tmp1, i32 4, i32 1 )
	br label %return

return:		; preds = %entry
	ret void
}

declare void @llvm.memcpy.i32(i8*, i8*, i32, i32)