Resources for “Optimization in GCC”

GCC Home page: gcc.gnu.org

Using the GNU Compiler Collection (GCC): gcc.gnu.org/onlinedocs/gcc-3.2.2/gcc

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-O1 and inline-functions

Bill McConaughey's picture

The article states that -O is equivalent to -O0 (no optimization). The manual says -O0 and no "-O" option at all are the same, and -O is equivalent to -O1.
I am using -O with programs that require inline (using in and out macros), and I get inline function expansions for those and for memcpy etc., but the manual says the inline-functions optimization is only done with -O3. Is this an error in the manual?

Where are the source files fr

Anonymous's picture

Where are the source files from your article. I am specifically interested in your timing calls. TIA