AMDGPU/SI: Add amdgpu_kernel calling convention. Part 1.

Summary:
This will be used for AMDGPU_HSA_KERNEL symbol type in output ELF.

Also, in the future unused non-kernels may be optimized.

For now, also accept SPIR_KERNEL for HCC frontend.

Also, add bitcode compatibility tests for missing calling conventions
except AVR_BUILTIN which doesn't have parse code.

Reviewers: tstellarAMD, arsenm

Subscribers: arsenm, joker.eph, llvm-commits
llvm-svn: 268717

4 files changed, 5 insertions, 0 deletions

diff --git a/llvm/lib/AsmParser/LLLexer.cpp b/llvm/lib/AsmParser/LLLexer.cpp
index d9b90bc92c9..fd0081f6f97 100644
--- a/llvm/lib/AsmParser/LLLexer.cpp
+++ b/llvm/lib/AsmParser/LLLexer.cpp
@@ -604,6 +604,7 @@ lltok::Kind LLLexer::LexIdentifier() {
   KEYWORD(amdgpu_gs);
   KEYWORD(amdgpu_ps);
   KEYWORD(amdgpu_cs);
+  KEYWORD(amdgpu_kernel);
 
   KEYWORD(cc);
   KEYWORD(c);
diff --git a/llvm/lib/AsmParser/LLParser.cpp b/llvm/lib/AsmParser/LLParser.cpp
index d9b7f3efe94..a8f44e982a2 100644
--- a/llvm/lib/AsmParser/LLParser.cpp
+++ b/llvm/lib/AsmParser/LLParser.cpp
@@ -1636,6 +1636,7 @@ bool LLParser::ParseOptionalDLLStorageClass(unsigned &Res) {
 ///   ::= 'amdgpu_gs'
 ///   ::= 'amdgpu_ps'
 ///   ::= 'amdgpu_cs'
+///   ::= 'amdgpu_kernel'
 ///   ::= 'cc' UINT
 ///
 bool LLParser::ParseOptionalCallingConv(unsigned &CC) {
@@ -1675,6 +1676,7 @@ bool LLParser::ParseOptionalCallingConv(unsigned &CC) {
   case lltok::kw_amdgpu_gs:      CC = CallingConv::AMDGPU_GS; break;
   case lltok::kw_amdgpu_ps:      CC = CallingConv::AMDGPU_PS; break;
   case lltok::kw_amdgpu_cs:      CC = CallingConv::AMDGPU_CS; break;
+  case lltok::kw_amdgpu_kernel:  CC = CallingConv::AMDGPU_KERNEL; break;
   case lltok::kw_cc: {
       Lex.Lex();
       return ParseUInt32(CC);
diff --git a/llvm/lib/AsmParser/LLToken.h b/llvm/lib/AsmParser/LLToken.h
index 5d0e98dd623..d755e694cde 100644
--- a/llvm/lib/AsmParser/LLToken.h
+++ b/llvm/lib/AsmParser/LLToken.h
@@ -111,6 +111,7 @@ namespace lltok {
     kw_amdgpu_gs,
     kw_amdgpu_ps,
     kw_amdgpu_cs,
+    kw_amdgpu_kernel,
 
     // Attributes:
     kw_attributes,
diff --git a/llvm/lib/IR/AsmWriter.cpp b/llvm/lib/IR/AsmWriter.cpp
index 43165bf65ed..c709416dc82 100644
--- a/llvm/lib/IR/AsmWriter.cpp
+++ b/llvm/lib/IR/AsmWriter.cpp
@@ -332,6 +332,7 @@ static void PrintCallingConv(unsigned cc, raw_ostream &Out) {
   case CallingConv::AMDGPU_GS:     Out << "amdgpu_gs"; break;
   case CallingConv::AMDGPU_PS:     Out << "amdgpu_ps"; break;
   case CallingConv::AMDGPU_CS:     Out << "amdgpu_cs"; break;
+  case CallingConv::AMDGPU_KERNEL: Out << "amdgpu_kernel"; break;
   }
 }