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compiler: annotate or fix fall through cases in switch statements 

A new GCC warning, -Wimplicit-fallthrough, detected these three cases
    where a switch case falls through to another.  One of them looks like
    a bug, so I fixed it; the two other look like intended fall throughs
    so I just added a "fall through" comment to suppress the GCC warning.
    
    Bootstrapped and ran Go testsuite on x86_64-pc-linux-gnu.
    
    Reviewed-on: https://go-review.googlesource.com/26695

From-SVN: r239332
This commit is contained in:
Ian Lance Taylor 2016-08-10 18:56:35 +00:00
parent 5a02adf63e
commit 4cc1fc4f9e
3 changed files with 4 additions and 1 deletions
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2
gcc/go/gofrontend/MERGE
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@ -1,4 +1,4 @@
8da2129a005cc1f44d4d993b0b7312b64c0d68a4 5e05b7bc947231b4d5a8327bf63e2fa648e51dc7
The first line of this file holds the git revision number of the last The first line of this file holds the git revision number of the last
merge done from the gofrontend repository. merge done from the gofrontend repository.

2
gcc/go/gofrontend/escape.cc
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@ -281,6 +281,7 @@ Node::op_format() const
{ {
case Runtime::PANIC: case Runtime::PANIC:
op << "panic"; op << "panic";
break;
case Runtime::APPEND: case Runtime::APPEND:
op << "append"; op << "append";
@ -1923,6 +1924,7 @@ Escape_analysis_assign::assign(Node* dst, Node* src)
if (!e->type()->has_pointer()) if (!e->type()->has_pointer())
break; break;
} }
// Fall through.
case Expression::EXPRESSION_CONVERSION: case Expression::EXPRESSION_CONVERSION:
case Expression::EXPRESSION_TYPE_GUARD: case Expression::EXPRESSION_TYPE_GUARD:

1
gcc/go/gofrontend/expressions.cc
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@ -5767,6 +5767,7 @@ Binary_expression::do_get_backend(Translate_context* context)
case OPERATOR_DIV: case OPERATOR_DIV:
if (left_type->float_type() != NULL || left_type->complex_type() != NULL) if (left_type->float_type() != NULL || left_type->complex_type() != NULL)
break; break;
// Fall through.
case OPERATOR_MOD: case OPERATOR_MOD:
is_idiv_op = true; is_idiv_op = true;
break; break;