cmd/compile: mark booleans as registerizable
Boolean values fit in registers, mark them accordingly. Improves codegen a bit.
compilecmp for darwin/amd64:
compress/gzip
compress/gzip.(*Reader).Reset 1017 -> 985 (-3.15%)
net
net.newRequest 1002 -> 970 (-3.19%)
crypto/tls
crypto/tls.(*sessionState).unmarshal 1054 -> 968 (-8.16%)
cmd/compile/internal/syntax
cmd/compile/internal/syntax.Fprint 518 -> 453 (-12.55%)
cmd/vendor/github.com/ianlancetaylor/demangle
cmd/vendor/github.com/ianlancetaylor/demangle.ASTToString 389 -> 325 (-16.45%)
cmd/go/internal/load
cmd/go/internal/load.PackagesAndErrors 3453 -> 3381 (-2.09%)
cmd/compile/internal/ssa
cmd/compile/internal/ssa.registerizable 249 -> 255 (+2.41%)
cmd/compile/internal/ssagen
cmd/compile/internal/ssagen.buildssa 9388 -> 9356 (-0.34%)
file before after Δ %
compress/gzip.s 8247 8215 -32 -0.388%
net.s 266667 266635 -32 -0.012%
crypto/tls.s 290324 290238 -86 -0.030%
cmd/compile/internal/syntax.s 156422 156357 -65 -0.042%
cmd/vendor/github.com/ianlancetaylor/demangle.s 268313 268249 -64 -0.024%
cmd/go/internal/load.s 122946 122874 -72 -0.059%
cmd/compile/internal/ssa.s
3551201 3551207 +6 +0.000%
cmd/compile/internal/ssagen.s 362299 362267 -32 -0.009%
total
19725872 19725495 -377 -0.002%
Change-Id: I4cd40b54d8b2da6d1f946e51f16689315a369dca
Reviewed-on: https://go-review.googlesource.com/c/go/+/408474
Run-TryBot: Keith Randall <khr@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: David Chase <drchase@google.com>
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@google.com>