1cfb5c3fd5
Adds the new canMergeLoad function which can be used by rules to decide whether a load can be merged into an operation. The function ensures that the merge will not reorder the load relative to memory operations (for example, stores) in such a way that the block can no longer be scheduled. This new function enables transformations such as: MOVD 0(R1), R2 ADD R2, R3 to: ADD 0(R1), R3 The two-operand form of the following instructions can now read a single memory operand: - ADD - ADDC - ADDW - MULLD - MULLW - SUB - SUBC - SUBE - SUBW - AND - ANDW - OR - ORW - XOR - XORW Improves SHA3 performance by 6-8%. Updates #15054. Change-Id: Ibcb9122126cd1a26f2c01c0dfdbb42fe5e7b5b94 Reviewed-on: https://go-review.googlesource.com/29272 Run-TryBot: Michael Munday <munday@ca.ibm.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Keith Randall <khr@golang.org> |
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The Go Programming Language
Go is an open source programming language that makes it easy to build simple, reliable, and efficient software.
For documentation about how to install and use Go, visit https://golang.org/ or load doc/install-source.html in your web browser.
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Binary Distribution Notes
If you have just untarred a binary Go distribution, you need to set the environment variable $GOROOT to the full path of the go directory (the one containing this file). You can omit the variable if you unpack it into /usr/local/go, or if you rebuild from sources by running all.bash (see doc/install-source.html). You should also add the Go binary directory $GOROOT/bin to your shell's path.
For example, if you extracted the tar file into $HOME/go, you might put the following in your .profile:
export GOROOT=$HOME/go
export PATH=$PATH:$GOROOT/bin
See https://golang.org/doc/install or doc/install.html for more details.