From: Josh Bleecher Snyder <josharian@gmail.com>
Date: Mon, 27 Jul 2015 19:45:56 +0000 (-0700)
Subject: [dev.ssa] cmd/compile: detect unbalanced rules
X-Git-Tag: go1.7beta1~1623^2^2~343
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=1807d54d8594c52cdf79c8a9ad60607d2796fec6;p=gostls13.git

[dev.ssa] cmd/compile: detect unbalanced rules

Rules may span multiple lines,
but if we're still unbalanced at the
end of the file, something is wrong.

I write unbalanced rules depressingly often.

Change-Id: Ibd04aa06539e2a0ffef73bb665febf3542fd11f1
Reviewed-on: https://go-review.googlesource.com/12710
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 46e0e507c4..8dca0bca1f 100644
--- a/src/cmd/compile/internal/ssa/gen/rulegen.go
+++ b/src/cmd/compile/internal/ssa/gen/rulegen.go
@@ -88,6 +88,9 @@ func genRules(arch arch) {
 		}
 		rule = ""
 	}
+	if unbalanced(rule) {
+		log.Fatalf("unbalanced rule: %v\n", rule)
+	}
 	if err := scanner.Err(); err != nil {
 		log.Fatalf("scanner failed: %v\n", err)
 	}