Rename metadata from ref to implicit.ref.

Author: mandlebug

llvm/docs/LangRef.rst

@@ -8670,10 +8670,11 @@ denoting if the type contains a pointer.
 
   !0 = !{!"<type-name>", i1 <contains-pointer>}
 
-'``ref``' Metadata
-^^^^^^^^^^^^^^^^^^
+'``implicit.ref``' Metadata
+^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
 
-The ``ref`` metadata may be attached to a function or global variable
+The ``implicit.ref`` metadata may be attached to a function or global variable
 definition with a single argument that references a global object.
 This is typically used when there is some implicit dependence between the
 symbols that is otherwise opaque to the linker. One such example is metadata
@@ -8695,7 +8696,7 @@ Example:
 
     @a = global i32 1
     @b = global i32 2
-    @c = global i32 3, section "abc", !ref !0, !ref !1
+    @c = global i32 3, section "abc", !implicit.ref !0, !implicit.ref !1
     !0 = !{ptr @a}
     !1 = !{ptr @b}
 

llvm/include/llvm/IR/FixedMetadataKinds.def

@@ -57,4 +57,4 @@ LLVM_FIXED_MD_KIND(MD_callee_type, "callee_type", 42)
 LLVM_FIXED_MD_KIND(MD_nofree, "nofree", 43)
 LLVM_FIXED_MD_KIND(MD_captures, "captures", 44)
 LLVM_FIXED_MD_KIND(MD_alloc_token, "alloc_token", 45)
-LLVM_FIXED_MD_KIND(MD_ref, "ref", 46)
+LLVM_FIXED_MD_KIND(MD_implicit_ref, "implicit.ref", 46)

llvm/lib/IR/Verifier.cpp

@@ -770,12 +770,12 @@ void Verifier::visitGlobalValue(const GlobalValue &GV) {
                               RangeLikeMetadataKind::AbsoluteSymbol);
     }
 
-    if (GO->hasMetadata(LLVMContext::MD_ref)) {
+    if (GO->hasMetadata(LLVMContext::MD_implicit_ref)) {
       Check(!GO->isDeclaration(),
             "ref metadata must not be placed on a declaration", GO);
 
       SmallVector<MDNode *> MDs;
-      GO->getMetadata(LLVMContext::MD_ref, MDs);
+      GO->getMetadata(LLVMContext::MD_implicit_ref, MDs);
       for (const MDNode *MD : MDs) {
         Check(MD->getNumOperands() == 1, "ref metadata must have one operand",
               &GV, MD);

llvm/lib/Target/PowerPC/PPCAsmPrinter.cpp

@@ -2803,7 +2803,7 @@ void PPCAIXAsmPrinter::emitGlobalVariableHelper(const GlobalVariable *GV) {
   // Switch to the containing csect.
   OutStreamer->switchSection(Csect);
 
-  if (GV->hasMetadata(LLVMContext::MD_ref)) {
+  if (GV->hasMetadata(LLVMContext::MD_implicit_ref)) {
     emitRefMetadata(GV);
   }
 
@@ -2906,7 +2906,7 @@ void PPCAIXAsmPrinter::emitFunctionEntryLabel() {
     OutStreamer->emitLabel(
         getObjFileLowering().getFunctionEntryPointSymbol(Alias, TM));
 
-  if (F->hasMetadata(LLVMContext::MD_ref)) {
+  if (F->hasMetadata(LLVMContext::MD_implicit_ref)) {
     emitRefMetadata(F);
   }
 }
@@ -3350,7 +3350,7 @@ void PPCAIXAsmPrinter::emitTTypeReference(const GlobalValue *GV,
 
 void PPCAIXAsmPrinter::emitRefMetadata(const GlobalObject *GO) {
   SmallVector<MDNode *> MDs;
-  GO->getMetadata(LLVMContext::MD_ref, MDs);
+  GO->getMetadata(LLVMContext::MD_implicit_ref, MDs);
   assert(MDs.size() && "Expected asscoiated metadata nodes");
 
   for (const MDNode *MD : MDs) {

llvm/test/CodeGen/PowerPC/aix-func-ref.ll

@@ -14,11 +14,11 @@
 @b = global i32 2
 @c = global i32 3
 
-define i32 @foo() !ref !0 {
+define i32 @foo() !implicit.ref !0 {
   ret i32 0
 }
 
-define i32 @bar() !ref !1 !ref !2 {
+define i32 @bar() !implicit.ref !1 !implicit.ref !2 {
   ret i32 0
 }
 

llvm/test/CodeGen/PowerPC/aix-ref-metadata.ll

@@ -10,9 +10,9 @@
 @a = global i32 1
 @b = global i32 2
 @c = global i32 3, section "custom_section_c"
-@d = global i32 4, !ref !0
-@e = constant i32 5, !ref !1, !ref!2
-@f = global i32 6, section "custom_section_f", !ref !1
+@d = global i32 4, !implicit.ref !0
+@e = constant i32 5, !implicit.ref !1, !implicit.ref!2
+@f = global i32 6, section "custom_section_f", !implicit.ref !1
 
 
 !0 = !{ptr @a}

llvm/test/Verifier/ref-func.ll

@@ -2,9 +2,9 @@
 
 @a = global i32 1
 @b = global i32 2
-@c = global i32 3, !ref !0
+@c = global i32 3, !implicit.ref !0
 
-define i32 @foo() !ref !1 {
+define i32 @foo() !implicit.ref !1 {
   ret i32 0
 }
 

llvm/test/Verifier/ref.ll

@@ -1,10 +1,10 @@
 ; RUN: not llvm-as -disable-output < %s -o /dev/null 2>&1 | FileCheck %s
 
-@a = global i32 1, !ref !0
-@b = global i32 2, !ref !1
-@c = global i32 3, !ref !1, !ref !2
-@d = global i32 4, !ref !3
-@e = external global i32, !ref !1
+@a = global i32 1, !implicit.ref !0
+@b = global i32 2, !implicit.ref !1
+@c = global i32 3, !implicit.ref !1, !implicit.ref !2
+@d = global i32 4, !implicit.ref !3
+@e = external global i32, !implicit.ref !1
 
 !0 = !{i32 1}
 !1 = !{ptr @b}