diff options
Diffstat (limited to 'doc/ccomp.1')
| -rw-r--r-- | doc/ccomp.1 | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/doc/ccomp.1 b/doc/ccomp.1 index 7ccf97c8..f4919867 100644 --- a/doc/ccomp.1 +++ b/doc/ccomp.1 @@ -125,7 +125,8 @@ Enabled by default. .TP .B \-O0 Turn off most optimizations. -Synonymous to \fB\-fno\-const\-prop\fP \fB\-fno\-cse\fP \fB\-fno\-redundancy\fP \fB\-fno\-tailcalls\fP. +Synonymous to \fB\-fno\-const\-prop\fP \fB\-fno\-cse\fP \fB\-fno\-if\-conversion\fP +\fB\-fno\-inline\fP \fB\-fno\-redundancy\fP \fB\-fno\-tailcalls\fP. . .TP .BR \-O1 ", " \-O2 ", " \-O3 @@ -136,6 +137,13 @@ Synonymous for \fB\-O\fP. Optimize for code size in preference to code speed. . .TP +.B \-Obranchless +Optimize to generate fewer conditional branches and use branch-free +instruction sequences instead. When \fB-fif\-conversion\fP is +enabled, the conversion is peformed aggressively even if the resulting +code is less performant. +. +.TP .BR \-fconst\-prop ", " \-fno\-const\-prop Turn on/off global constant propagation. Enabled by default. @@ -146,6 +154,11 @@ Turn on/off common subexpression elimination. Enabled by default. . .TP +.BR \-fif\-conversion ", " \-fno\-if\-conversion +Turn on/off generation of conditional moves. +Enabled by default. +. +.TP .BR \-finline ", " \-fno\-inline Turn on/off inlining of functions. Enabled by default. @@ -433,6 +446,11 @@ Enabled by default. Declarations which do not declare anything. Enabled by default. .sp +\fInon\-linear\-cond\-expr\fP: +Conditional expression that may not be optimized to branchless code. +Only issued in \fB-Obranchless\fP mode. +Disabled by default. +.sp \fIpointer\-type\-mismatch\fP: Use of incompatible pointer types in conditional expressions. Enabled by default. |