| Reid Spencer | f31918b | 2005-05-03 00:52:19 +0000 | [diff] [blame] | 1 | ; Test that the StrNCmpOptimizer works correctly |
| Tanya Lattner | ceca194 | 2008-03-10 07:21:50 +0000 | [diff] [blame^] | 2 | ; RUN: llvm-as < %s | opt -simplify-libcalls | llvm-dis | \ |
| Reid Spencer | 43b4003 | 2007-04-16 15:31:49 +0000 | [diff] [blame] | 3 | ; RUN: not grep {call.*strncmp} |
| Reid Spencer | d2db880 | 2005-05-03 00:50:43 +0000 | [diff] [blame] | 4 | |
| Tanya Lattner | ceca194 | 2008-03-10 07:21:50 +0000 | [diff] [blame^] | 5 | @hello = constant [6 x i8] c"hello\00" ; <[6 x i8]*> [#uses=1] |
| 6 | @hell = constant [5 x i8] c"hell\00" ; <[5 x i8]*> [#uses=1] |
| 7 | @null = constant [1 x i8] zeroinitializer ; <[1 x i8]*> [#uses=1] |
| Reid Spencer | d2db880 | 2005-05-03 00:50:43 +0000 | [diff] [blame] | 8 | |
| Tanya Lattner | ceca194 | 2008-03-10 07:21:50 +0000 | [diff] [blame^] | 9 | declare i32 @strncmp(i8*, i8*, i32) |
| Reid Spencer | d2db880 | 2005-05-03 00:50:43 +0000 | [diff] [blame] | 10 | |
| Tanya Lattner | ceca194 | 2008-03-10 07:21:50 +0000 | [diff] [blame^] | 11 | declare i32 @puts(i8*) |
| 12 | |
| 13 | define i32 @main() { |
| 14 | %hello_p = getelementptr [6 x i8]* @hello, i32 0, i32 0 ; <i8*> [#uses=5] |
| 15 | %hell_p = getelementptr [5 x i8]* @hell, i32 0, i32 0 ; <i8*> [#uses=1] |
| 16 | %null_p = getelementptr [1 x i8]* @null, i32 0, i32 0 ; <i8*> [#uses=4] |
| 17 | %temp1 = call i32 @strncmp( i8* %hello_p, i8* %hello_p, i32 5 ) ; <i32> [#uses=1] |
| 18 | %temp2 = call i32 @strncmp( i8* %null_p, i8* %null_p, i32 0 ) ; <i32> [#uses=1] |
| 19 | %temp3 = call i32 @strncmp( i8* %hello_p, i8* %null_p, i32 0 ) ; <i32> [#uses=1] |
| 20 | %temp4 = call i32 @strncmp( i8* %null_p, i8* %hello_p, i32 0 ) ; <i32> [#uses=1] |
| 21 | %temp5 = call i32 @strncmp( i8* %hell_p, i8* %hello_p, i32 4 ) ; <i32> [#uses=1] |
| 22 | %rslt1 = add i32 %temp1, %temp2 ; <i32> [#uses=1] |
| 23 | %rslt2 = add i32 %rslt1, %temp3 ; <i32> [#uses=1] |
| 24 | %rslt3 = add i32 %rslt2, %temp4 ; <i32> [#uses=1] |
| 25 | %rslt4 = add i32 %rslt3, %temp5 ; <i32> [#uses=1] |
| 26 | ret i32 %rslt4 |
| Reid Spencer | d2db880 | 2005-05-03 00:50:43 +0000 | [diff] [blame] | 27 | } |
| Tanya Lattner | ceca194 | 2008-03-10 07:21:50 +0000 | [diff] [blame^] | 28 | |