[BOLT,RISCV] Remove empty name special case from #68977

The special case is unneeded after #89693.

Pull Request: #90004

Author: MaskRay

bolt/lib/Rewrite/RewriteInstance.cpp

@@ -1725,12 +1725,6 @@ void RewriteInstance::adjustFunctionBoundaries() {
       if (!Function.isSymbolValidInScope(Symbol, SymbolSize))
         break;
 
-      // Ignore unnamed symbols. Used, for example, by debugging info on RISC-V.
-      if (BC->isRISCV() && cantFail(Symbol.getName()).empty()) {
-        ++NextSymRefI;
-        continue;
-      }
-
       // Skip basic block labels. This happens on RISC-V with linker relaxation
       // enabled because every branch needs a relocation and corresponding
       // symbol. We don't want to add such symbols as entry points.

bolt/test/RISCV/unnamed-sym-no-entry.c renamed to bolt/test/RISCV/fake-label-no-entry.c

@@ -5,12 +5,12 @@
 
 // RUN: %clang %cflags -g -Wl,-q -o %t %s
 
-/// Verify that the binary indeed contains an unnamed symbol at _start
+/// Verify that the binary indeed contains a fake label ".L0 " at _start.
 // RUN: llvm-readelf -s %t | FileCheck %s --check-prefix=CHECK-ELF
 // CHECK-ELF-DAG: [[#%x,START:]] {{.*}} FUNC GLOBAL DEFAULT [[#%d,SECTION:]] _start{{$}}
 // CHECK-ELF-DAG: [[#%x,START]] {{.*}} NOTYPE LOCAL DEFAULT [[#SECTION]] .L0 {{$}}
 
-/// Verify that BOLT did not create an extra entry point for the unnamed symbol
+/// Verify that BOLT did not create an extra entry point for the fake label.
 // RUN: llvm-bolt -o %t.bolt %t --print-cfg | FileCheck %s
 // CHECK: Binary Function "_start" after building cfg {
 // CHECK:  IsMultiEntry: 0