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author | Rémy Oudompheng <oudomphe@phare.normalesup.org> | 2012-01-14 17:00:14 +0100 |
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committer | Luuk van Dijk <lvd@golang.org> | 2012-01-14 17:00:14 +0100 |
commit | 6b72b070166c94f386cdaeea7bc762cdcf277bd3 (patch) | |
tree | 10230a253f64a401191af3c37da98fbae321831c | |
parent | a9e1f6d7a67d0cc423765e83193640335e8b8301 (diff) | |
download | go-6b72b070166c94f386cdaeea7bc762cdcf277bd3.tar.gz go-6b72b070166c94f386cdaeea7bc762cdcf277bd3.zip |
gc: do not compile switch on interface values into a binary search.
Fixes #2672.
R=golang-dev, lvd
CC=golang-dev, remy
https://golang.org/cl/5543058
-rw-r--r-- | src/cmd/gc/swt.c | 2 | ||||
-rw-r--r-- | test/fixedbugs/bug393.go | 30 |
2 files changed, 31 insertions, 1 deletions
diff --git a/src/cmd/gc/swt.c b/src/cmd/gc/swt.c index 8b1b93c7da..6c0a9ac832 100644 --- a/src/cmd/gc/swt.c +++ b/src/cmd/gc/swt.c @@ -540,7 +540,7 @@ loop: } // deal with the variables one-at-a-time - if(c0->type != Texprconst) { + if(!okforcmp[t->etype] || c0->type != Texprconst) { a = exprbsw(c0, 1, arg); cas = list(cas, a); c0 = c0->link; diff --git a/test/fixedbugs/bug393.go b/test/fixedbugs/bug393.go new file mode 100644 index 0000000000..e21b9c4a41 --- /dev/null +++ b/test/fixedbugs/bug393.go @@ -0,0 +1,30 @@ +// $G $D/$F.go || echo BUG: bug393 + +// Copyright 2012 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// issue 2672 +// was trying binary search with an interface type + +package main + +func f(x interface{}) int { + switch x { + case 1: + return 1 + case 2: + return 2 + case 3: + return 3 + case 4: + return 4 + case "5": + return 5 + case "6": + return 6 + default: + return 7 + } + panic("switch") +} |