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Interactions of IPA-CP and IPA-SRA on the same data is a rather big source of issues, I'm afraid. PR 113964 is a situation where IPA-CP propagates an unsigned short in a union parameter into a function which itself calls a different function which has a same union parameter and both these union parameters are split with IPA-SRA. The leaf function however uses a signed short member of the union. In the calling function, we get the unsigned constant as the replacement for the union and it is then passed in the call without any type compatibility checks. Apparently on riscv64 it matters whether the parameter is signed or unsigned short and so the leaf function can see different values. Fixed by using useless_type_conversion_p at the appropriate place and if it fails, use force_value_to type as elsewhere in similar situations. gcc/ChangeLog: 2024-04-04 Martin Jambor <mjambor@suse.cz> PR ipa/113964 * ipa-param-manipulation.cc (ipa_param_adjustments::modify_call): Force values obtined through pass-through maps to the expected split type. gcc/testsuite/ChangeLog: 2024-04-04 Patrick O'Neill <patrick@rivosinc.com> Martin Jambor <mjambor@suse.cz> PR ipa/113964 * gcc.dg/ipa/pr114247.c: New test. |
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