File: 2006-10-19-SwitchUnnecessaryBranching.ll

package info (click to toggle)
llvm-toolchain-4.0 1%3A4.0.1-10~deb9u2
  • links: PTS, VCS
  • area: main
  • in suites: stretch
  • size: 493,332 kB
  • sloc: cpp: 2,698,100; ansic: 552,773; asm: 128,821; python: 121,589; objc: 105,054; sh: 21,174; lisp: 6,758; ml: 5,532; perl: 5,311; pascal: 5,245; makefile: 2,083; cs: 1,868; xml: 686; php: 212; csh: 117
file content (29 lines) | stat: -rw-r--r-- 845 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
; RUN: llc < %s -march=x86 -asm-verbose | FileCheck %s

@str = internal constant [14 x i8] c"Hello world!\0A\00"		; <[14 x i8]*> [#uses=1]
@str.upgrd.1 = internal constant [13 x i8] c"Blah world!\0A\00"		; <[13 x i8]*> [#uses=1]

define i32 @test(i32 %argc, i8** %argv) nounwind {
entry:
; CHECK: cmpl	$2
; CHECK-NEXT: je
; CHECK-NEXT: %entry

	switch i32 %argc, label %UnifiedReturnBlock [
		 i32 1, label %bb
		 i32 2, label %bb2
	]

bb:		; preds = %entry
	%tmp1 = tail call i32 (i8*, ...) @printf( i8* getelementptr ([14 x i8], [14 x i8]* @str, i32 0, i64 0) )		; <i32> [#uses=0]
	ret i32 0

bb2:		; preds = %entry
	%tmp4 = tail call i32 (i8*, ...) @printf( i8* getelementptr ([13 x i8], [13 x i8]* @str.upgrd.1, i32 0, i64 0) )		; <i32> [#uses=0]
	ret i32 0

UnifiedReturnBlock:		; preds = %entry
	ret i32 0
}

declare i32 @printf(i8*, ...)