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| author | Ian Lance Taylor <ian@gcc.gnu.org> | 2019-07-10 17:56:40 +0000 |
|---|---|---|
| committer | Ian Lance Taylor <ian@gcc.gnu.org> | 2019-07-10 17:56:40 +0000 |
| commit | 41112d9519d48a503864a157d90fd3c6ef974bfe (patch) | |
| tree | 428f83007d8eb2564561333bb23809f32a8f7b41 | |
| parent | b59ff58620d1d4ffff5c74bd9f9f10f3cb222d8e (diff) | |
| download | gcc-41112d9519d48a503864a157d90fd3c6ef974bfe.zip gcc-41112d9519d48a503864a157d90fd3c6ef974bfe.tar.gz gcc-41112d9519d48a503864a157d90fd3c6ef974bfe.tar.bz2 | |
compiler: add break label in 1,2-case select statement lowering
CL 184998 added optimizations for one- and two-case select
statements. But it didn't handle break statement in the select
case correctly. Specifically, it didn't add the label definition,
so it could result in a dangling goto. This CL fixes this, by
adding the label definition.
A test case is CL 185520.
Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/185519
From-SVN: r273359
| -rw-r--r-- | gcc/go/gofrontend/MERGE | 2 | ||||
| -rw-r--r-- | gcc/go/gofrontend/statements.cc | 8 |
2 files changed, 9 insertions, 1 deletions
diff --git a/gcc/go/gofrontend/MERGE b/gcc/go/gofrontend/MERGE index 410afb0..582ded3 100644 --- a/gcc/go/gofrontend/MERGE +++ b/gcc/go/gofrontend/MERGE @@ -1,4 +1,4 @@ -7a8e10be0ddb8909ce25a264d03b24cee4df60cc +170ecdf6b2eab8aac2b8c852fa95d3c36d6bf604 The first line of this file holds the git revision number of the last merge done from the gofrontend repository. diff --git a/gcc/go/gofrontend/statements.cc b/gcc/go/gofrontend/statements.cc index 1e88fab..b0b576f 100644 --- a/gcc/go/gofrontend/statements.cc +++ b/gcc/go/gofrontend/statements.cc @@ -5855,6 +5855,10 @@ Select_statement::lower_one_case(Block* b) Statement::make_block_statement(scase.statements(), scase.location()); b->add_statement(bs); + Statement* label = + Statement::make_unnamed_label_statement(this->break_label()); + b->add_statement(label); + this->is_lowered_ = true; return Statement::make_block_statement(b, loc); } @@ -5958,6 +5962,10 @@ Select_statement::lower_two_case(Block* b) Statement::make_if_statement(call, bchan, defcase.statements(), loc); b->add_statement(ifs); + Statement* label = + Statement::make_unnamed_label_statement(this->break_label()); + b->add_statement(label); + this->is_lowered_ = true; return Statement::make_block_statement(b, loc); } |