94a017f3f5
OpVarXXX Values don't generate instructions, so there's no reason not to duplicate them, and duplicating them generates better code (fewer branches). This requires changing the start/end accounting to correctly handle the case in which we have run of Values beginning with an OpVarXXX, e.g. OpVarDef, OpZeroWB, OpMoveWB. In that case, the sequence of values should begin at the OpZeroWB, not the OpVarDef. This also lays the groundwork for experimenting with allowing duplication of some scalar stores. Shrinks function text sizes a tiny amount: name old object-bytes new object-bytes delta Template 381k ± 0% 381k ± 0% -0.01% (p=0.008 n=5+5) Unicode 203k ± 0% 203k ± 0% -0.04% (p=0.008 n=5+5) GoTypes 1.17M ± 0% 1.17M ± 0% -0.01% (p=0.008 n=5+5) SSA 8.24M ± 0% 8.24M ± 0% -0.00% (p=0.008 n=5+5) Flate 230k ± 0% 230k ± 0% ~ (all equal) GoParser 286k ± 0% 286k ± 0% ~ (all equal) Reflect 1.00M ± 0% 1.00M ± 0% ~ (all equal) Tar 189k ± 0% 189k ± 0% ~ (all equal) XML 415k ± 0% 415k ± 0% -0.01% (p=0.008 n=5+5) Updates #19838 Change-Id: Ic5ef30855919f1468066eba08ae5c4bd9a01db27 Reviewed-on: https://go-review.googlesource.com/42011 Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Cherry Zhang <cherryyz@google.com> |
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README.md
The Go Programming Language
Go is an open source programming language that makes it easy to build simple, reliable, and efficient software.
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To contribute, please read the contribution guidelines: https://golang.org/doc/contribute.html
Note that the Go project does not use GitHub pull requests, and that we use the issue tracker for bug reports and proposals only. See https://golang.org/wiki/Questions for a list of places to ask questions about the Go language.