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compiler: check error expression in Array_type::get_backend_length 

Otherwise, a zero length is created in the backend and the
    backend doesn't know there is an error.
    
    Reviewed-on: https://go-review.googlesource.com/61610

From-SVN: r252849
This commit is contained in:
Ian Lance Taylor 2017-09-15 21:07:54 +00:00
parent efc79e1e86
commit 41dfa93fb8
2 changed files with 6 additions and 1 deletions
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2
gcc/go/gofrontend/MERGE
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@ -1,4 +1,4 @@
4e063a8eee636cce17aea48c7183e78431174de3
de7b370901c4fc6852eaa7372282bb699429ec4a
The first line of this file holds the git revision number of the last
merge done from the gofrontend repository.

5
gcc/go/gofrontend/types.cc
View File

@ -7638,6 +7638,11 @@ Array_type::get_backend_length(Gogo* gogo)
go_assert(this->length_ != NULL);
if (this->blength_ == NULL)
{
if (this->length_->is_error_expression())
{
this->blength_ = gogo->backend()->error_expression();
return this->blength_;
}
Numeric_constant nc;
mpz_t val;
if (this->length_->numeric_constant_value(&nc) && nc.to_int(&val))