2341f675ed
In this PR case LRA needs to provide too many hard regs for insn reloads, where some reload pseudos require 8 aligned regs for themselves. As the last attempt, LRA tries to split live ranges of hard regs for insn reload pseudos. It is a very rare case. An inheritance pseudo involving a reload pseudo of the insn can be spilled in the assignment sub-pass run right after splitting and we need to run split sub-pass for the inheritance pseudo now. gcc/ChangeLog: PR target/115458 * lra-int.h (LRA_MAX_FAILED_SPLITS): Define and check its value. (lra_split_hard_reg_for): Change prototype. * lra.cc (lra): Try to split hard reg range several times after a failure. * lra-assigns.cc (lra_split_hard_reg_for): Add an arg, a flag of giving up. Report asm error and nullify the asm insn depending on the arg value. gcc/testsuite/ChangeLog: PR target/115458 * g++.target/riscv/pr115458.C: New. |
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