GCC modified for the FreeChainXenon project
e0786ca9a1
The following testcase ICEs in the movabsq $(i32 << shift), r64 peephole2 I've added a while back to use smaller code than movabsq if possible. If i32 is 0xfa1e0ff3 and shift is not divisible by 8, then it creates an invalid insn (as 0xfa1e0ff3 CONST_INT is not allowed as x86_64_immediate_operand nor x86_64_zext_immediate_operand), the peephole2 even triggers on it again and again (this time with shift 0) until it gives up. The following patch fixes that. As ix86_endbr_immediate_operand needs a CONST_INT and it is hopefully rare, I chose to use FAIL rather than handling it in the condition (where I'd probably need to call ctz_hwi again etc.). 2023-12-05 Jakub Jelinek <jakub@redhat.com> PR target/112845 * config/i386/i386.md (movabsq $(i32 << shift), r64 peephole2): FAIL if the new immediate is ix86_endbr_immediate_operand. |
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