[gcc r17-2316] RISC-V: Don't drop multilibs matching the default march/mabi

https://gcc.gnu.org/g:38d41abb75838df35493f150ef756846360b9543

commit r17-2316-g38d41abb75838df35493f150ef756846360b9543
Author: Jim Lin <[email protected]>
Date:   Fri Jul 10 10:43:04 2026 -0600

    RISC-V: Don't drop multilibs matching the default march/mabi
    
    A multilib entry that shares march/mabi with the default may
    differ in other options such as mcmodel, so it is not equivalent
    to the default multilib.  Stop returning false for these entries
    in riscv_multi_lib_info_t::parse so they are still recorded.
    
    gcc/ChangeLog:
    
            * common/config/riscv/riscv-common.cc
            (riscv_multi_lib_info_t::parse): Remove early-out for multilibs
            matching only the default march/mabi.

Diff:
---
 gcc/common/config/riscv/riscv-common.cc | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/gcc/common/config/riscv/riscv-common.cc b/gcc/common/config/riscv/riscv-common.cc
index 783692076a75..2d56ba59f0e4 100644
--- a/gcc/common/config/riscv/riscv-common.cc
+++ b/gcc/common/config/riscv/riscv-common.cc
@@ -1927,12 +1927,6 @@ riscv_multi_lib_info_t::parse (
 	  multi_lib_info->arch_str = itr->c_str () + strlen ("march=");
 	else if (prefixed_with (*itr, "mabi="))
 	  multi_lib_info->abi_str = itr->c_str () + strlen ("mabi=");
-
-	/* Skip this multi-lib if this configuration is exactly same as
-	   default multi-lib settings.  */
-      if (multi_lib_info->arch_str == default_arch_str
-	  && multi_lib_info->abi_str == default_abi_str)
-	return false;
     }
 
   multi_lib_info->subset_list =