[BitCode] Add noprofile to getAttrFromCode()

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 phase but it cannot be handled during the linking
phase.

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

Reviewed By: MaskRay

Differential Revision: https://reviews.llvm.org/D104995

Author: nathanchance

llvm/lib/Bitcode/Reader/BitcodeReader.cpp

@@ -1439,6 +1439,8 @@ static Attribute::AttrKind getAttrFromCode(uint64_t Code) {
     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:

llvm/test/Bitcode/attributes.ll

@@ -459,6 +459,12 @@ 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 }
@@ -508,4 +514,5 @@ define void @f77() nosanitize_coverage
 ; 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 }