AMDGPU: Add support for isa version note

  - Emit NT_AMD_AMDGPU_ISA
  - Add assembler parsing for isa version directive
    - If isa version directive does not match command line arguments, then return error

Differential Revision: https://reviews.llvm.org/D38748

llvm-svn: 315808

1 files changed, 23 insertions, 0 deletions

diff --git a/llvm/lib/Target/AMDGPU/AsmParser/AMDGPUAsmParser.cpp b/llvm/lib/Target/AMDGPU/AsmParser/AMDGPUAsmParser.cpp
index 519c24b7c45..7f8c28e9c24 100644
--- a/llvm/lib/Target/AMDGPU/AsmParser/AMDGPUAsmParser.cpp
+++ b/llvm/lib/Target/AMDGPU/AsmParser/AMDGPUAsmParser.cpp
@@ -832,6 +832,7 @@ private:
   bool subtargetHasRegister(const MCRegisterInfo &MRI, unsigned RegNo) const;
   bool ParseDirectiveAMDGPUHsaKernel();
 
+  bool ParseDirectiveISAVersion();
   bool ParseDirectiveHSAMetadata();
   bool ParseDirectivePALMetadata();
 
@@ -2452,6 +2453,25 @@ bool AMDGPUAsmParser::ParseDirectiveAMDGPUHsaKernel() {
   return false;
 }
 
+bool AMDGPUAsmParser::ParseDirectiveISAVersion() {
+  auto ISAVersionStringFromASM = getLexer().getTok().getStringContents();
+
+  std::string ISAVersionStringFromSTI;
+  raw_string_ostream ISAVersionStreamFromSTI(ISAVersionStringFromSTI);
+  IsaInfo::streamIsaVersion(&getSTI(), ISAVersionStreamFromSTI);
+
+  if (ISAVersionStringFromASM != ISAVersionStreamFromSTI.str()) {
+    return Error(getParser().getTok().getLoc(),
+                 ".amd_amdgpu_isa directive does not match triple and/or mcpu "
+                 "arguments specified through the command line");
+  }
+
+  getTargetStreamer().EmitISAVersion(ISAVersionStreamFromSTI.str());
+  Lex();
+
+  return false;
+}
+
 bool AMDGPUAsmParser::ParseDirectiveHSAMetadata() {
   std::string HSAMetadataString;
   raw_string_ostream YamlStream(HSAMetadataString);
@@ -2527,6 +2547,9 @@ bool AMDGPUAsmParser::ParseDirective(AsmToken DirectiveID) {
   if (IDVal == ".amdgpu_hsa_kernel")
     return ParseDirectiveAMDGPUHsaKernel();
 
+  if (IDVal == ".amd_amdgpu_isa")
+    return ParseDirectiveISAVersion();
+
   if (IDVal == AMDGPU::HSAMD::AssemblerDirectiveBegin)
     return ParseDirectiveHSAMetadata();