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Cherry Mui 40a6e2dae5 cmd/compile: tighten for huge functions in -N mode
Currently, in -N mode we skip the tighten pass. However, for very
large functions, many values live across blocks can cause
pathological behavior in the register allocator, which could use
a huge amount of memory or cause the program to hang. For
functions that large, debugging using a debugger is unlikely to be
very useful (the function is probably generated anyway). So we do
a little optimization to make fewer values live across blocks and
make it easier for the compiler.

Fixes #52180.

Change-Id: I355fe31bb87ea5d0870bb52dd06405dd5d791dab
Reviewed-on: https://go-review.googlesource.com/c/go/+/475339
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Cherry Mui <cherryyz@google.com>
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
2023-03-13 22:04:56 +00:00
.github .github: suggest using private browsing in pkgsite template 2023-01-03 18:52:47 +00:00
api testing: add Testing function 2023-03-13 21:58:46 +00:00
doc doc: start draft Go 1.21 release notes 2023-02-22 18:53:00 +00:00
lib/time time/tzdata: generate zip constant during cmd/dist 2023-01-17 22:30:53 +00:00
misc runtime/cgo: add tsan sync for traceback function 2023-03-08 20:11:59 +00:00
src cmd/compile: tighten for huge functions in -N mode 2023-03-13 22:04:56 +00:00
test cmd/compile: reorder operations in SCCs to enable more inlining 2023-03-09 22:13:26 +00:00
.gitattributes
.gitignore time/tzdata: generate zip constant during cmd/dist 2023-01-17 22:30:53 +00:00
codereview.cfg codereview.cfg: add codereview.cfg for master branch 2021-02-19 18:44:53 +00:00
CONTRIBUTING.md
go.env cmd/go: introduce GOROOT/go.env and move proxy/sumdb config there 2023-01-17 23:10:39 +00:00
LICENSE
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README.md README: update from CC-BY-3.0 to CC-BY-4.0 2022-11-02 20:14:56 +00:00
SECURITY.md SECURITY.md: replace golang.org with go.dev 2022-04-26 19:59:47 +00:00

The Go Programming Language

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