[BitCode] Add noprofile to getAttrFromCode()

[nathanchance]

Summary

After D104475 / D104658, building the Linux kernel with ThinLTO is
broken:

ld.lld: error: Unknown attribute kind (73) (Producer: 'LLVM13.0.0git'
Reader: 'LLVM 13.0.0git')

getAttrFromCode() has never handled this attribute so it is written
during the ThinLTO but it cannot be handled during the linking phase.

Add noprofile to getAttrFromCode() so that disassembly works properly.

[MaskRay]

Thanks!

llvm/lib/Bitcode/Reader/BitcodeReader.cpp

static Attribute::AttrKind getAttrFromCode(uint64_t Code) {
   case bitc::ATTR_KIND_NO_RED_ZONE:
     return Attribute::NoRedZone;
   case bitc::ATTR_KIND_NO_RETURN:
     return Attribute::NoReturn;
   case bitc::ATTR_KIND_NOSYNC:
     return Attribute::NoSync;
   case bitc::ATTR_KIND_NOCF_CHECK:
     return Attribute::NoCfCheck;
+  case bitc::ATTR_KIND_NO_PROFILE:
+    return Attribute::NoProfile;
   case bitc::ATTR_KIND_NO_UNWIND:
     return Attribute::NoUnwind;
   case bitc::ATTR_KIND_NO_SANITIZE_COVERAGE:
     return Attribute::NoSanitizeCoverage;
   case bitc::ATTR_KIND_NULL_POINTER_IS_VALID:
     return Attribute::NullPointerIsValid;
   case bitc::ATTR_KIND_OPT_FOR_FUZZING:
     return Attribute::OptForFuzzing;

llvm/test/Bitcode/attributes.ll

 }
 
 ; CHECK: define void @f77() #48
 define void @f77() nosanitize_coverage
 {
         ret void;
 }
 
+; CHECK: define void @f78() #49
+define void @f78() noprofile
+{
+        ret void;
+}
+
 ; CHECK: attributes #0 = { noreturn }
 ; CHECK: attributes #1 = { nounwind }
 ; CHECK: attributes #2 = { readnone }
 ; CHECK: attributes #3 = { readonly }
 ; CHECK: attributes #4 = { noinline }
 ; CHECK: attributes #5 = { alwaysinline }
 ; CHECK: attributes #6 = { optsize }
 ; CHECK: attributes #7 = { ssp }

 ; CHECK: attributes #41 = { mustprogress }
 ; CHECK: attributes #42 = { nocallback }
 ; CHECK: attributes #43 = { cold }
 ; CHECK: attributes #44 = { hot }
 ; CHECK: attributes #45 = { vscale_range(8,8) }
 ; CHECK: attributes #46 = { vscale_range(1,8) }
 ; CHECK: attributes #47 = { vscale_range(1,0) }
 ; CHECK: attributes #48 = { nosanitize_coverage }
+; CHECK: attributes #49 = { noprofile }
 ; CHECK: attributes #[[NOBUILTIN]] = { nobuiltin }