From 2744189c46c6e6ab92796de9211d079ff25d4fe5 Mon Sep 17 00:00:00 2001
From: Alex Lorenz <arphaman@gmail.com>
Date: Fri, 17 Jul 2015 00:24:15 +0000
Subject: [PATCH] MIR Serialization: Serialize the frame setup machine
 instruction flag.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@242491 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/MIRParser/MILexer.cpp             |  1 +
 lib/CodeGen/MIRParser/MILexer.h               |  1 +
 lib/CodeGen/MIRParser/MIParser.cpp            | 15 ++++---
 lib/CodeGen/MIRPrinter.cpp                    |  4 +-
 .../MIR/X86/frame-setup-instruction-flag.mir  | 39 +++++++++++++++++++
 5 files changed, 54 insertions(+), 6 deletions(-)
 create mode 100644 test/CodeGen/MIR/X86/frame-setup-instruction-flag.mir

diff --git a/lib/CodeGen/MIRParser/MILexer.cpp b/lib/CodeGen/MIRParser/MILexer.cpp
index 53c393da45d..6f74838812f 100644
--- a/lib/CodeGen/MIRParser/MILexer.cpp
+++ b/lib/CodeGen/MIRParser/MILexer.cpp
@@ -73,6 +73,7 @@ static MIToken::TokenKind getIdentifierKind(StringRef Identifier) {
       .Case("dead", MIToken::kw_dead)
       .Case("killed", MIToken::kw_killed)
       .Case("undef", MIToken::kw_undef)
+      .Case("frame-setup", MIToken::kw_frame_setup)
       .Default(MIToken::Identifier);
 }
 
diff --git a/lib/CodeGen/MIRParser/MILexer.h b/lib/CodeGen/MIRParser/MILexer.h
index 03b4d486f98..2085eb38f0c 100644
--- a/lib/CodeGen/MIRParser/MILexer.h
+++ b/lib/CodeGen/MIRParser/MILexer.h
@@ -43,6 +43,7 @@ struct MIToken {
     kw_dead,
     kw_killed,
     kw_undef,
+    kw_frame_setup,
 
     // Identifier tokens
     Identifier,
diff --git a/lib/CodeGen/MIRParser/MIParser.cpp b/lib/CodeGen/MIRParser/MIParser.cpp
index b2931189578..3b820c3cdee 100644
--- a/lib/CodeGen/MIRParser/MIParser.cpp
+++ b/lib/CodeGen/MIRParser/MIParser.cpp
@@ -107,7 +107,7 @@ private:
   /// instruction name is invalid.
   bool parseInstrName(StringRef InstrName, unsigned &OpCode);
 
-  bool parseInstruction(unsigned &OpCode);
+  bool parseInstruction(unsigned &OpCode, unsigned &Flags);
 
   bool verifyImplicitOperands(ArrayRef<MachineOperandWithLocation> Operands,
                               const MCInstrDesc &MCID);
@@ -175,11 +175,11 @@ bool MIParser::parse(MachineInstr *&MI) {
     lex();
   }
 
-  unsigned OpCode;
-  if (Token.isError() || parseInstruction(OpCode))
+  unsigned OpCode, Flags = 0;
+  if (Token.isError() || parseInstruction(OpCode, Flags))
     return true;
 
-  // TODO: Parse the instruction flags and memory operands.
+  // TODO: Parse the bundle instruction flags and memory operands.
 
   // Parse the remaining machine operands.
   while (Token.isNot(MIToken::Eof)) {
@@ -203,6 +203,7 @@ bool MIParser::parse(MachineInstr *&MI) {
 
   // TODO: Check for extraneous machine operands.
   MI = MF.CreateMachineInstr(MCID, DebugLoc(), /*NoImplicit=*/true);
+  MI->setFlags(Flags);
   for (const auto &Operand : Operands)
     MI->addOperand(MF, Operand.Operand);
   return false;
@@ -295,7 +296,11 @@ bool MIParser::verifyImplicitOperands(
   return false;
 }
 
-bool MIParser::parseInstruction(unsigned &OpCode) {
+bool MIParser::parseInstruction(unsigned &OpCode, unsigned &Flags) {
+  if (Token.is(MIToken::kw_frame_setup)) {
+    Flags |= MachineInstr::FrameSetup;
+    lex();
+  }
   if (Token.isNot(MIToken::Identifier))
     return error("expected a machine instruction");
   StringRef InstrName = Token.stringValue();
diff --git a/lib/CodeGen/MIRPrinter.cpp b/lib/CodeGen/MIRPrinter.cpp
index a701ffdce6a..a1c28bc5697 100644
--- a/lib/CodeGen/MIRPrinter.cpp
+++ b/lib/CodeGen/MIRPrinter.cpp
@@ -334,8 +334,10 @@ void MIPrinter::print(const MachineInstr &MI) {
 
   if (I)
     OS << " = ";
+  if (MI.getFlag(MachineInstr::FrameSetup))
+    OS << "frame-setup ";
   OS << TII->getName(MI.getOpcode());
-  // TODO: Print the instruction flags, machine mem operands.
+  // TODO: Print the bundling instruction flags, machine mem operands.
   if (I < E)
     OS << ' ';
 
diff --git a/test/CodeGen/MIR/X86/frame-setup-instruction-flag.mir b/test/CodeGen/MIR/X86/frame-setup-instruction-flag.mir
new file mode 100644
index 00000000000..ca34fe1050d
--- /dev/null
+++ b/test/CodeGen/MIR/X86/frame-setup-instruction-flag.mir
@@ -0,0 +1,39 @@
+# RUN: llc -march=x86-64 -start-after branch-folder -stop-after branch-folder -o /dev/null %s | FileCheck %s
+# This test ensures that the MIR parser parses the frame setup instruction flag.
+
+--- |
+
+  define i32 @compute(i32 %a) {
+  body:
+    %c = mul i32 %a, 11
+    ret i32 %c
+  }
+
+  define i32 @foo(i32 %a) {
+  entry:
+    %b = call i32 @compute(i32 %a)
+    ret i32 %b
+  }
+
+...
+---
+name:            compute
+body:
+  - name:        body
+    id:          0
+    instructions:
+      - '%eax = IMUL32rri8 %edi, 11, implicit-def %eflags'
+      - 'RETQ %eax'
+...
+---
+name:            foo
+body:
+  - name:        entry
+    id:          0
+    instructions:
+      # CHECK: frame-setup PUSH64r %rax
+      - 'frame-setup PUSH64r %rax, implicit-def %rsp, implicit %rsp'
+      - 'CALL64pcrel32 @compute, csr_64, implicit %rsp, implicit %edi, implicit-def %rsp, implicit-def %eax'
+      - '%rdx = POP64r implicit-def %rsp, implicit %rsp'
+      - 'RETQ %eax'
+...
-- 
2.34.1