diff options
Diffstat (limited to 'gcc/config/i386/i386.cc')
| -rw-r--r-- | gcc/config/i386/i386.cc | 25 |
1 files changed, 23 insertions, 2 deletions
diff --git a/gcc/config/i386/i386.cc b/gcc/config/i386/i386.cc index 590cdf1..e9611a1 100644 --- a/gcc/config/i386/i386.cc +++ b/gcc/config/i386/i386.cc @@ -12442,6 +12442,28 @@ static GTY(()) rtx ix86_tls_symbol; static rtx ix86_tls_get_addr (void) { + if (cfun->machine->call_saved_registers + == TYPE_NO_CALLER_SAVED_REGISTERS) + { + /* __tls_get_addr doesn't preserve vector registers. When a + function with no_caller_saved_registers attribute calls + __tls_get_addr, YMM and ZMM registers will be clobbered. + Issue an error and suggest -mtls-dialect=gnu2 in this case. */ + if (cfun->machine->func_type == TYPE_NORMAL) + error (G_("%<-mtls-dialect=gnu2%> must be used with a function" + " with the %<no_caller_saved_registers%> attribute")); + else + error (cfun->machine->func_type == TYPE_EXCEPTION + ? G_("%<-mtls-dialect=gnu2%> must be used with an" + " exception service routine") + : G_("%<-mtls-dialect=gnu2%> must be used with an" + " interrupt service routine")); + /* Don't issue the same error twice. */ + cfun->machine->func_type = TYPE_NORMAL; + cfun->machine->call_saved_registers + = TYPE_DEFAULT_CALL_SAVED_REGISTERS; + } + if (!ix86_tls_symbol) { const char *sym @@ -21491,8 +21513,7 @@ ix86_hard_regno_nregs (unsigned int regno, machine_mode mode) /* Register pair for mask registers. */ if (mode == P2QImode || mode == P2HImode) return 2; - if (mode == V64SFmode || mode == V64SImode) - return 4; + return 1; } |