[gcc r15-7485] RISC-V: Drop __riscv_vendor_feature_bits

[Jeff Law via Gcc-cvs]

https://gcc.gnu.org/g:2605daa6b896aed15dead194462725874f332c0a

commit r15-7485-g2605daa6b896aed15dead194462725874f332c0a
Author: Yangyu Chen <c...@cyyself.name>
Date:   Tue Feb 11 18:40:41 2025 -0700

    RISC-V: Drop __riscv_vendor_feature_bits
    
    As discussed from RISC-V C-API PR #101 [1], As discussed in #96, current
    interface is insufficient to support some cases, like a vendor buying a
    CPU IP from the upstream vendor but using their own mvendorid and custom
    features from the upstream vendor. In this case, we might need to add
    these extensions for each downstream vendor many times. Thus, making
    __riscv_vendor_feature_bits guarded by mvendorid is not a good idea. So,
    drop __riscv_vendor_feature_bits for now, and we should have time to
    discuss a better solution.
    
    [1] https://github.com/riscv-non-isa/riscv-c-api-doc/pull/101
    
    Signed-off-by: Yangyu Chen <c...@cyyself.name>
    
    gcc/ChangeLog:
    
            * config/riscv/riscv-feature-bits.h 
(RISCV_VENDOR_FEATURE_BITS_LENGTH): Drop.
            (struct riscv_vendor_feature_bits): Drop.
    
    libgcc/ChangeLog:
    
            * config/riscv/feature_bits.c (RISCV_VENDOR_FEATURE_BITS_LENGTH): 
Drop.
            (__init_riscv_features_bits_linux): Drop.

Diff:
---
 gcc/config/riscv/riscv-feature-bits.h |  7 -------
 libgcc/config/riscv/feature_bits.c    | 10 ----------
 2 files changed, 17 deletions(-)

diff --git a/gcc/config/riscv/riscv-feature-bits.h 
b/gcc/config/riscv/riscv-feature-bits.h
index b571c44285fe..7ef7a2aecb71 100644
--- a/gcc/config/riscv/riscv-feature-bits.h
+++ b/gcc/config/riscv/riscv-feature-bits.h
@@ -28,13 +28,6 @@ struct riscv_feature_bits {
   unsigned long long features[RISCV_FEATURE_BITS_LENGTH];
 };
 
-#define RISCV_VENDOR_FEATURE_BITS_LENGTH 1
-
-struct riscv_vendor_feature_bits {
-  unsigned length;
-  unsigned long long features[RISCV_VENDOR_FEATURE_BITS_LENGTH];
-};
-
 struct riscv_cpu_model {
   unsigned mvendorid;
   unsigned long long marchid;
diff --git a/libgcc/config/riscv/feature_bits.c 
b/libgcc/config/riscv/feature_bits.c
index b34d4eea1d15..157bcdcad69a 100644
--- a/libgcc/config/riscv/feature_bits.c
+++ b/libgcc/config/riscv/feature_bits.c
@@ -30,13 +30,6 @@ struct {
   unsigned long long features[RISCV_FEATURE_BITS_LENGTH];
 } __riscv_feature_bits __attribute__ ((visibility ("hidden"), nocommon));
 
-#define RISCV_VENDOR_FEATURE_BITS_LENGTH 1
-
-struct {
-  unsigned length;
-  unsigned long long features[RISCV_VENDOR_FEATURE_BITS_LENGTH];
-} __riscv_vendor_feature_bits __attribute__ ((visibility ("hidden"), 
nocommon));
-
 struct {
   unsigned mvendorid;
   unsigned long long marchid;
@@ -382,8 +375,6 @@ static void __init_riscv_features_bits_linux ()
     __riscv_feature_bits.features[i] = features[i];
 
   __riscv_feature_bits.length = RISCV_FEATURE_BITS_LENGTH;
-
-  __riscv_vendor_feature_bits.length = 0;
 }
 #endif
 
@@ -402,7 +393,6 @@ __init_riscv_feature_bits ()
 #else
   /* Unsupported, just initialize that into all zeros.  */
   __riscv_feature_bits.length = 0;
-  __riscv_vendor_feature_bits.length = 0;
   __riscv_cpu_model.mvendorid = 0;
   __riscv_cpu_model.marchid = 0;
   __riscv_cpu_model.mimpid = 0;