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cmd/compile: eliminate direct uses of gc.Thearch in backends

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This CL changes the GOARCH.Init functions to take gc.Thearch as a
parameter, which gc.Main supplies.

Additionally, the x86 backend is refactored to decide within Init
whether to use the 387 or SSE2 instruction generators, rather than for
each individual SSA Value/Block.

Passes toolstash-check -all.

Change-Id: Ie6305a6cd6f6ab4e89ecbb3cbbaf5ffd57057a24
Reviewed-on: https://go-review.googlesource.com/38301
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
This commit is contained in:
Matthew Dempsky 2017-03-17 13:35:31 -07:00
parent aea44109cf
commit 3e2f980e27
20 changed files with 129 additions and 160 deletions
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4
src/cmd/compile/internal/gc/main.go
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@ -107,11 +107,13 @@ var benchfile string
// Main parses flags and Go source files specified in the command-line
// arguments, type-checks the parsed Go package, compiles functions to machine
// code, and finally writes the compiled package definition to disk.
func Main() {
func Main(archInit func(*Arch)) {
timings.Start("fe", "init")
defer hidePanic()
archInit(&Thearch)
Ctxt = obj.Linknew(Thearch.LinkArch)
Ctxt.DebugInfo = debuginfo
Ctxt.DiagFunc = yyerror