diff options
| -rw-r--r-- | lib/Target/README.txt | 27 |
1 files changed, 0 insertions, 27 deletions
diff --git a/lib/Target/README.txt b/lib/Target/README.txt index f4f767a..efb91a1 100644 --- a/lib/Target/README.txt +++ b/lib/Target/README.txt @@ -1439,33 +1439,6 @@ This pattern repeats several times, basically doing: //===---------------------------------------------------------------------===// -186.crafty contains this interesting pattern: - -%77 = call i8* @strstr(i8* getelementptr ([6 x i8]* @"\01LC5", i32 0, i32 0), - i8* %30) -%phitmp648 = icmp eq i8* %77, getelementptr ([6 x i8]* @"\01LC5", i32 0, i32 0) -br i1 %phitmp648, label %bb70, label %bb76 - -bb70: ; preds = %OptionMatch.exit91, %bb69 - %78 = call i32 @strlen(i8* %30) nounwind readonly align 1 ; <i32> [#uses=1] - -This is basically: - cststr = "abcdef"; - if (strstr(cststr, P) == cststr) { - x = strlen(P); - ... - -The strstr call would be significantly cheaper written as: - -cststr = "abcdef"; -if (memcmp(P, str, strlen(P))) - x = strlen(P); - -This is memcmp+strlen instead of strstr. This also makes the strlen fully -redundant. - -//===---------------------------------------------------------------------===// - 186.crafty also contains this code: %1906 = call i32 @strlen(i8* getelementptr ([32 x i8]* @pgn_event, i32 0,i32 0)) |