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Don't reuse reference after potential resize.

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When a new def chain is requested, any existing reference may no longer
be valid, so just use the object directly.

	PR tree-optimization/103467
	* gimple-range-gori.cc (range_def_chain::register_dependency): Don't
	use an object reference after a potential resize.
This commit is contained in:
Andrew MacLeod 2021-11-29 19:53:50 -05:00
parent 87cd82c81d
commit ab202b659d
1 changed files with 4 additions and 3 deletions
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7
gcc/gimple-range-gori.cc
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@ -278,11 +278,12 @@ range_def_chain::register_dependency (tree name, tree dep, basic_block bb)
{
// Get the def chain for the operand.
b = get_def_chain (dep);
// If there was one, copy it into result.
// If there was one, copy it into result. Access def_chain directly
// as the get_def_chain request above could reallocate the vector.
if (b)
bitmap_ior_into (src.bm, b);
bitmap_ior_into (m_def_chain[v].bm, b);
// And copy the import list.
set_import (src, NULL_TREE, get_imports (dep));
set_import (m_def_chain[v], NULL_TREE, get_imports (dep));
}
else
// Originated outside the block, so it is an import.