From: Josh Bleecher Snyder <josharian@gmail.com>
Date: Sun, 10 Mar 2019 03:34:58 +0000 (-0800)
Subject: cmd/compile: normalize more whitespace in rewrite rules
X-Git-Tag: go1.13beta1~1109
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=b4fbd291b3872706422d39fd1140b7b929c77622;p=gostls13.git

cmd/compile: normalize more whitespace in rewrite rules

If you write a rewrite rule:

(something) && noteRule("X")-> (something)

then rulegen will panic with an error message about commutativity.
The real problem is the lack of a space between the ) and the ->.
Normalize that bit of whitespace too.

Change-Id: Idbd53687cd0398fe275ff2702667688cad05b4ca
Reviewed-on: https://go-review.googlesource.com/c/go/+/166427
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
---

diff --git a/src/cmd/compile/internal/ssa/gen/rulegen.go b/src/cmd/compile/internal/ssa/gen/rulegen.go
index 730e768ed6..f3a54b6299 100644
--- a/src/cmd/compile/internal/ssa/gen/rulegen.go
+++ b/src/cmd/compile/internal/ssa/gen/rulegen.go
@@ -1019,5 +1019,6 @@ func normalizeWhitespace(x string) string {
 	x = strings.Join(strings.Fields(x), " ")
 	x = strings.Replace(x, "( ", "(", -1)
 	x = strings.Replace(x, " )", ")", -1)
+	x = strings.Replace(x, ")->", ") ->", -1)
 	return x
 }