X-Git-Url: https://git.xonotic.org/?a=blobdiff_plain;f=doc%2Fgmqcc.1;h=bbaaaf39ded1ec542cd5d19335a6027db80a4855;hb=456e80a7d5b7309ce9409e2f1ab9224a039eb890;hp=3f3983a0465d27c158cf7abc63895373f200f12d;hpb=c3dfe2c61c202dc62da01806c0ae78e4dcb3c3c2;p=xonotic%2Fgmqcc.git

diff --git a/doc/gmqcc.1 b/doc/gmqcc.1
index 3f3983a..bbaaaf3 100644
--- a/doc/gmqcc.1
+++ b/doc/gmqcc.1
@@ -389,6 +389,41 @@ possible.
 Don't generate defs for immediate values or even declared constants.
 Meaning variables which are implicitly constant or qualified as such
 using the 'const' keyword.
+.TP
+.B -Ooverlap-strings
+Aggressively reuse strings in the string section. When a string should
+be added which is the trailing substring of an already existing
+string, the existing string's tail will be returned instead of the new
+string being added.
+
+For example the following code will only generate 1 string:
+
+.in +4
+.nf
+print("Hell you!\\n");
+print("you!\\n"); // trailing substring of "Hello you!\\n"
+.fi
+.in
+There's however one limitation. Strings are still processed in order,
+so if the above print statements were reversed, this optimization
+would not happen.
+.TP
+.B -Ocall-stores
+By default, all parameters of a CALL are copied into the
+parameter-globals right before the CALL instructions. This is the
+easiest and safest way to translate calls, but also adds a lot of
+unnecessary copying and unnecessary temporary values. This
+optimization makes operations which are used as a parameter evaluate
+directly into the parameter-global if that is possible, which is when
+there's no other CALL instruction in between.
+.TP
+.B -Ovoid-return
+Usually an empty RETURN instruction is added to the end of a void
+typed function. However, additionally after every function a DONE
+instruction is added for several reasons. (For example the qcvm's
+disassemble switch uses it to know when the function ends.). This
+optimization replaces that last RETURN with DONE rather than adding
+the DONE additionally.
 .SH CONFIG
 The configuration file is similar to regular .ini files. Comments
 start with hashtags or semicolons, sections are written in square