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We were emitting warning even on attribute that were then removed by the cfgstrip pass. We cannot move the cfg strip pass before the attribute checking because we need to first emit malformed input error messages. This means the attribute checking pass must know if an attribute input may be removed later down the line. gcc/rust/ChangeLog: * ast/rust-ast.cc (MetaItemPathExpr::to_attribute): Remove cast to literal. (AttrInputMetaItemContainer::separate_cfg_attrs): Remove PathExpr specific code. * expand/rust-cfg-strip.cc (expand_cfg_attrs): Remove the whole attribute if condition's result is false. * util/rust-attributes.cc (AttributeChecker::visit): Remove specific code section for meta item container. Do not check input if configuration does not match condition. gcc/testsuite/ChangeLog: * rust/compile/attr_malformed_path.rs: Filter existing test to x86_64 exclusively, add two new tests that appear when visiting the resulting expression. Signed-off-by: Pierre-Emmanuel Patry <pierre-emmanuel.patry@embecosm.com>
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