Martin Jambor
f0f372fab3
PR 108959 shows one more example where undefined code with type incompatible accesses to stuff passed in parameters can cause an ICE because we try to create a VIEW_CONVERT_EXPR of mismatching sizes: 1. IPA-CP tries to push one type from above, 2. IPA-SRA (correctly) decides the parameter is useless because it is only used to construct an argument to another function which does not use it and so the formal parameter should be removed, 3. but the code reconciling IPA-CP and IPA-SRA transformations still wants to perform the IPA-CP and overrides the built-in DCE of useless statements and tries to stuff constants into them instead, constants of a type with mismatching type and size. This patch avoids the situation in IPA-SRA by purging the IPA-CP results from any "aggregate" constants that are passed in parameters which are detected to be useless. It also removes IPA value range and bits information associated with removed parameters stored in the same structure so that the useless information is not streamed later on. gcc/ChangeLog: 2023-03-22 Martin Jambor <mjambor@suse.cz> PR ipa/108959 * ipa-sra.cc (zap_useless_ipcp_results): New function. (process_isra_node_results): Call it. gcc/testsuite/ChangeLog: 2023-03-17 Martin Jambor <mjambor@suse.cz> PR ipa/108959 * gcc.dg/ipa/pr108959.c: New test.
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