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Updated CompilerOptimizations (markdown)

Dmitry Vyukov 2015-02-05 12:20:57 +03:00
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CompilerOptimizations.md

@ -36,12 +36,14 @@ decisions for the gc toolchain.
### Escape analysis
Gc compiler does global escape analysis across function and package boundaries. However, there are lots of cases where it gives up. For example, anything assigned to any indirection (`*p = ...`; `a[i] = ...`) is considered escaped. Other things that can inhibit analysis are: function calls, package boundaries, slice literals, subslicing and indexing, etc. Full rules are too complex to describe, so check the `-m` output.
* **gc:** 1.0+
* **gccgo:** not yet.
### Function Inlining
Only short and simple functions are inlined. To be inlined a function must contain less than ~40 expressions and does not contain complex things like loops, labels, closures, panic's, recover's, select's, switch'es, etc.
Only short and simple functions are inlined. To be inlined a function must contain less than ~40 expressions and does not contain complex things like function calls, loops, labels, closures, panic's, recover's, select's, switch'es, etc.
* **gc:** 1.0+
* **gccgo:** -O1 and above.