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* [gcc/devel/rust/master] Ensure we don't return error_mark_node for loop expressions
@ 2022-06-08 12:44 Thomas Schwinge
0 siblings, 0 replies; only message in thread
From: Thomas Schwinge @ 2022-06-08 12:44 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:0d8c298443615c1fd75c9af10ca26c7c36b69273
commit 0d8c298443615c1fd75c9af10ca26c7c36b69273
Author: Philip Herron <philip.herron@embecosm.com>
Date: Fri May 6 12:30:47 2022 +0100
Ensure we don't return error_mark_node for loop expressions
Loop expressions can return a value even if its a unit-type so we must
ensure we don't return an error_mark_node for the eventual coercion site
for the unit-type case.
Offending test-case was: rust/compile/torture/loop7.rs
Diff:
---
gcc/rust/backend/rust-compile-expr.h | 32 ++++++++++++--------------------
1 file changed, 12 insertions(+), 20 deletions(-)
diff --git a/gcc/rust/backend/rust-compile-expr.h b/gcc/rust/backend/rust-compile-expr.h
index bb81d4ed7bc..080686f9ce7 100644
--- a/gcc/rust/backend/rust-compile-expr.h
+++ b/gcc/rust/backend/rust-compile-expr.h
@@ -552,21 +552,16 @@ public:
}
fncontext fnctx = ctx->peek_fn ();
- Bvariable *tmp = NULL;
- bool needs_temp = !block_tyty->is_unit ();
- if (needs_temp)
- {
- tree enclosing_scope = ctx->peek_enclosing_scope ();
- tree block_type = TyTyResolveCompile::compile (ctx, block_tyty);
+ tree enclosing_scope = ctx->peek_enclosing_scope ();
+ tree block_type = TyTyResolveCompile::compile (ctx, block_tyty);
- bool is_address_taken = false;
- tree ret_var_stmt = NULL_TREE;
- tmp = ctx->get_backend ()->temporary_variable (
- fnctx.fndecl, enclosing_scope, block_type, NULL, is_address_taken,
- expr.get_locus (), &ret_var_stmt);
- ctx->add_statement (ret_var_stmt);
- ctx->push_loop_context (tmp);
- }
+ bool is_address_taken = false;
+ tree ret_var_stmt = NULL_TREE;
+ Bvariable *tmp = ctx->get_backend ()->temporary_variable (
+ fnctx.fndecl, enclosing_scope, block_type, NULL, is_address_taken,
+ expr.get_locus (), &ret_var_stmt);
+ ctx->add_statement (ret_var_stmt);
+ ctx->push_loop_context (tmp);
if (expr.has_loop_label ())
{
@@ -595,12 +590,9 @@ public:
= ctx->get_backend ()->loop_expression (code_block, expr.get_locus ());
ctx->add_statement (loop_expr);
- if (tmp != NULL)
- {
- ctx->pop_loop_context ();
- translated
- = ctx->get_backend ()->var_expression (tmp, expr.get_locus ());
- }
+ ctx->pop_loop_context ();
+ translated = ctx->get_backend ()->var_expression (tmp, expr.get_locus ());
+
ctx->pop_loop_begin_label ();
}
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