On Tue, Apr 29, 2025 at 9:56 AM H.J. Lu <hjl.to...@gmail.com> wrote: > > Don't expand UNSPEC_TLS_LD_BASE to a call so that the RTL local copy > propagation pass can eliminate multiple __tls_get_addr calls.
__tls_get_addr needs to be called with 16-byte aligned stack, I don't think the compiler will correctly handle required call alignment if you emit the call without emit_libcall_block. Uros. > > gcc/ > > PR target/81501 > * config/i386/i386-protos.h (ix86_split_tls_local_dynamic_base_64): > New. > * config/i386/i386.cc (ix86_split_tls_local_dynamic_base_64): New. > (legitimize_tls_address): Don't emit the 64-bit UNSPEC_TLS_LD_BASE > as a call. > * config/i386/i386.md (*tls_local_dynamic_base_64_<mode>): Renamed > to ... > (@tls_local_dynamic_base_call_64_<mode>): This. Replace > (match_operand 2) with (const_int 0). > (@tls_local_dynamic_base_64_<mode>): Change call to unspec. > (*tls_local_dynamic_base_64_<mode>): New. > > gcc/testsuite/ > > PR target/81501 > * gcc.target/i386/pr81501-1.c: New test. > > OK for master? > > Thanks. > > -- > H.J.
