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compiler: lvalue context fixes in Unary_expression::do_get_backend

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A couple of the Backend::var_expression invocations in
    Unary_expression::do_get_backend were selecting "lvalue" context
    incorrectly (these var exprs were not in an assignment or LHS
    position); fix is to change back to "rvalue" context.
    
    Reviewed-on: https://go-review.googlesource.com/45136

From-SVN: r249029
This commit is contained in:
Ian Lance Taylor 2017-06-08 18:42:04 +00:00
parent 2163b9bcc6
commit 3159d897bd
2 changed files with 4 additions and 4 deletions
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2
gcc/go/gofrontend/MERGE
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@ -1,4 +1,4 @@
4b857cde45939f0e9f3cf89b9e347b6f6ebe0f8f
81d9f6d05c2bb92b2b3af02807713b6bed9bf053
The first line of this file holds the git revision number of the last
merge done from the gofrontend repository.

6
gcc/go/gofrontend/expressions.cc
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@ -4370,7 +4370,7 @@ Unary_expression::do_get_backend(Translate_context* context)
gogo->backend()->implicit_variable_set_init(implicit, buf, btype,
true, copy_to_heap, false,
bexpr);
bexpr = gogo->backend()->var_expression(implicit, VE_lvalue, loc);
bexpr = gogo->backend()->var_expression(implicit, VE_rvalue, loc);
// If we are not copying a slice initializer to the heap,
// then it can be changed by the program, so if it can
@ -4380,7 +4380,7 @@ Unary_expression::do_get_backend(Translate_context* context)
&& this->expr_->type()->has_pointer())
{
Bexpression* root =
gogo->backend()->var_expression(implicit, VE_lvalue, loc);
gogo->backend()->var_expression(implicit, VE_rvalue, loc);
root = gogo->backend()->address_expression(root, loc);
Type* type = Type::make_pointer_type(this->expr_->type());
gogo->add_gc_root(Expression::make_backend(root, type, loc));
@ -4400,7 +4400,7 @@ Unary_expression::do_get_backend(Translate_context* context)
true, false, btype, loc);
gogo->backend()->immutable_struct_set_init(decl, buf, true, false,
btype, loc, bexpr);
bexpr = gogo->backend()->var_expression(decl, VE_lvalue, loc);
bexpr = gogo->backend()->var_expression(decl, VE_rvalue, loc);
}
go_assert(!this->create_temp_ || this->expr_->is_variable());