From 2b404385975c9070d6a902475591177591313501 Mon Sep 17 00:00:00 2001
From: Reid Spencer <rspencer@reidspencer.com>
Date: Sat, 2 Dec 2006 22:09:27 +0000
Subject: [PATCH] Implement upgrade of setcc instruction to icmp/fcmp, but
 don't enable it yet.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32139 91177308-0d34-0410-b5e6-96231b3b80d8
---
 tools/llvm-upgrade/UpgradeLexer.l  | 22 +++++++++++++
 tools/llvm-upgrade/UpgradeParser.y | 53 +++++++++++++++++++++++++++++-
 2 files changed, 74 insertions(+), 1 deletion(-)

diff --git a/tools/llvm-upgrade/UpgradeLexer.l b/tools/llvm-upgrade/UpgradeLexer.l
index 4b5fde7d09f..2cf7c51dac6 100644
--- a/tools/llvm-upgrade/UpgradeLexer.l
+++ b/tools/llvm-upgrade/UpgradeLexer.l
@@ -182,6 +182,28 @@ setlt           { RET_TOK( SETLT); }
 setgt           { RET_TOK( SETGT); }
 setle           { RET_TOK( SETLE); }
 setge           { RET_TOK( SETGE); }
+icmp            { RET_TOK(ICMP); }
+fcmp            { RET_TOK(FCMP); }
+eq              { RET_TOK(EQ); }
+ne              { RET_TOK(NE); }
+slt             { RET_TOK(SLT); }
+sgt             { RET_TOK(SGT); }
+sle             { RET_TOK(SLE); }
+sge             { RET_TOK(SGE); }
+oeq             { RET_TOK(OEQ); }
+one             { RET_TOK(ONE); }
+olt             { RET_TOK(OLT); }
+ogt             { RET_TOK(OGT); }
+ole             { RET_TOK(OLE); }
+oge             { RET_TOK(OGE); }
+ord             { RET_TOK(ORD); }
+uno             { RET_TOK(UNO); }
+ueq             { RET_TOK(UEQ); }
+une             { RET_TOK(UNE); }
+ult             { RET_TOK(ULT); }
+ugt             { RET_TOK(UGT); }
+ule             { RET_TOK(ULE); }
+uge             { RET_TOK(UGE); }
 
 phi             { RET_TOK( PHI_TOK); }
 call            { RET_TOK( CALL); }
diff --git a/tools/llvm-upgrade/UpgradeParser.y b/tools/llvm-upgrade/UpgradeParser.y
index 7815892cb87..9d2031dc740 100644
--- a/tools/llvm-upgrade/UpgradeParser.y
+++ b/tools/llvm-upgrade/UpgradeParser.y
@@ -22,6 +22,7 @@
 #define YYERROR_VERBOSE 1
 #define YYINCLUDED_STDLIB_H
 #define YYDEBUG 1
+#define UPGRADE_SETCOND_OPS 0
 
 int yylex();                       // declaration" of xxx warnings.
 int yyparse();
@@ -232,6 +233,34 @@ const char* getDivRemOpcode(const std::string& opcode, const TypeInfo& TI) {
       yyerror("Invalid type for rem instruction");
   return op;
 }
+
+std::string 
+getCompareOp(const std::string& setcc, const TypeInfo& TI) {
+  assert(setcc.length() == 5);
+  char cc1 = setcc[3];
+  char cc2 = setcc[4];
+  assert(cc1 == 'e' || cc1 == 'n' || cc1 == 'l' || cc1 == 'g');
+  assert(cc2 == 'q' || cc2 == 'e' || cc2 == 'e' || cc2 == 't');
+  std::string result("xcmp xxx");
+  result[6] = cc1;
+  result[7] = cc2;
+  if (TI.isFloatingPoint()) {
+    result[0] = 'f';
+    result[5] = 'o'; // FIXME: Always map to ordered comparison ?
+  } else if (TI.isIntegral() || TI.isPointer()) {
+    result[0] = 'i';
+    if ((cc1 == 'e' && cc2 == 'q') || (cc1 == 'n' && cc2 == 'e'))
+      result.erase(5,1);
+    else if (TI.isSigned())
+      result[5] = 's';
+    else if (TI.isUnsigned() || TI.isPointer())
+      result[5] = 'u';
+    else
+      yyerror("Invalid integral type for setcc");
+  }
+  return result;
+}
+
 %}
 
 %file-prefix="UpgradeParser"
@@ -262,6 +291,8 @@ const char* getDivRemOpcode(const std::string& opcode, const TypeInfo& TI) {
 %token <String> RET BR SWITCH INVOKE EXCEPT UNWIND UNREACHABLE
 %token <String> ADD SUB MUL DIV UDIV SDIV FDIV REM UREM SREM FREM AND OR XOR
 %token <String> SETLE SETGE SETLT SETGT SETEQ SETNE  // Binary Comparators
+%token <String> ICMP FCMP EQ NE SLT SGT SLE SGE OEQ ONE OLT OGT OLE OGE 
+%token <String> ORD UNO UEQ UNE ULT UGT ULE UGE
 %token <String> MALLOC ALLOCA FREE LOAD STORE GETELEMENTPTR
 %token <String> PHI_TOK SELECT SHL SHR ASHR LSHR VAARG
 %token <String> EXTRACTELEMENT INSERTELEMENT SHUFFLEVECTOR
@@ -279,7 +310,8 @@ const char* getDivRemOpcode(const std::string& opcode, const TypeInfo& TI) {
 %type <String> MemoryInst SymbolicValueRef OptSideEffect GlobalType
 %type <String> FnDeclareLinkage BasicBlockList BigOrLittle AsmBlock
 %type <String> Name ConstValueRef ConstVector External
-%type <String> ShiftOps SetCondOps LogicalOps ArithmeticOps CastOps 
+%type <String> ShiftOps SetCondOps LogicalOps ArithmeticOps CastOps CompareOps
+%type <String> Predicates
 
 %type <ValList> ValueRefList ValueRefListE IndexList
 
@@ -305,6 +337,9 @@ ArithmeticOps: ADD | SUB | MUL | DIV | UDIV | SDIV | FDIV
              | REM | UREM | SREM | FREM;
 LogicalOps   : AND | OR | XOR;
 SetCondOps   : SETLE | SETGE | SETLT | SETGT | SETEQ | SETNE;
+CompareOps   : ICMP | FCMP;
+Predicates   : EQ | NE | SLT | SGT | SLE | SGE | ULT | UGT | ULE | UGE
+             | OEQ | ONE | OLT | OGT | OLE | OGE | ORD | UNO | UEQ | UNE  ;
 ShiftOps     : SHL | SHR | ASHR | LSHR;
 CastOps      : TRUNC | ZEXT | SEXT | FPTRUNC | FPEXT | FPTOUI | FPTOSI | 
                UITOFP | SITOFP | PTRTOINT | INTTOPTR | BITCAST | CAST
@@ -627,10 +662,18 @@ ConstExpr: CastOps '(' ConstVal TO Types ')' {
     $$ = $1;
   }
   | SetCondOps '(' ConstVal ',' ConstVal ')' {
+#if UPGRADE_SETCOND_OPS
+    *$1 = getCompareOp(*$1, $3.type);
+#endif
     *$1 += "(" + *$3.cnst + "," + *$5.cnst + ")";
     $3.destroy(); $5.destroy();
     $$ = $1;
   }
+  | CompareOps Predicates '(' ConstVal ',' ConstVal ')' {
+    *$1 += "(" + *$2 + "," + *$4.cnst + "," + *$6.cnst + ")";
+    delete $2; $4.destroy(); $6.destroy();
+    $$ = $1;
+  }
   | ShiftOps '(' ConstVal ',' ConstVal ')' {
     const char* shiftop = $1->c_str();
     if (*$1 == "shr")
@@ -1132,10 +1175,18 @@ InstVal : ArithmeticOps Types ValueRef ',' ValueRef {
     $$ = $1;
   }
   | SetCondOps Types ValueRef ',' ValueRef {
+#if UPGRADE_SETCOND_OPS
+    *$1 = getCompareOp(*$1, $2);
+#endif
     *$1 += " " + *$2.newTy + " " + *$3.val + ", " + *$5.val;
     $2.destroy(); $3.destroy(); $5.destroy();
     $$ = $1;
   }
+  | CompareOps Predicates Types ValueRef ',' ValueRef ')' {
+    *$1 += " " + *$2 + " " + *$4.val + "," + *$6.val + ")";
+    delete $2; $4.destroy(); $6.destroy();
+    $$ = $1;
+  }
   | NOT ResolvedVal {
     *$1 += " " + *$2.val;
     $2.destroy();