| commit | 69ac3ee6de4fdcc5dd50d7f8958a8138c90064b0 | |
| author | Edwin Smith <smith@fb.com> | |
| Tue, 13 May 2014 18:24:12 +0000 (13 11:24 -0700) | ||
| committer | JoelMarcey <joelm@fb.com> | |
| Fri, 23 May 2014 23:09:14 +0000 (23 16:09 -0700) | ||
| tree | eb2d9e9ff211cca7ee05f3cda2d09063160e02a4 | treesnapshot (tar.gz zip) |
| parent | dc60e0e0e6ff3b5e53908d97868722a3eadb3981 | commitdiff |
Register coalescing.
Summary: Coalescing is a form of hinting. If two lifetimes are joined by
a copy, try to give the second one the same register as the first
one. For this diff, two kinds of copies are supported:
1. instructions with the "passthrough" flag, e.g. Mov or AssertType
2. phi copies defined by Jmp srcs and DefLabel dests.
Reviewed By: @swtaarrs
Differential Revision: D1339748
Summary: Coalescing is a form of hinting. If two lifetimes are joined by
a copy, try to give the second one the same register as the first
one. For this diff, two kinds of copies are supported:
1. instructions with the "passthrough" flag, e.g. Mov or AssertType
2. phi copies defined by Jmp srcs and DefLabel dests.
Reviewed By: @swtaarrs
Differential Revision: D1339748
| hphp/runtime/vm/jit/back-end-x64.cpp | diffblobblamehistory | |
| hphp/runtime/vm/jit/phys-loc.h | diffblobblamehistory | |
| hphp/runtime/vm/jit/xls.cpp | diffblobblamehistory |