[X86] Move getX86ConditionCode() from X86FastISel.cpp to X86InstrInfo.cpp. NFC

Summary:
Move getX86ConditionCode() from X86FastISel.cpp to X86InstrInfo.cpp so it can be used by GloabalIsel instruction selector.
This is a pre-commit for a patch I'm working on to support G_ICMP. NFC.

Reviewers: zvi, guyblank, delena

Reviewed By: guyblank, delena

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D33038

llvm-svn: 302767

3 files changed, 46 insertions, 42 deletions

diff --git a/llvm/lib/Target/X86/X86FastISel.cpp b/llvm/lib/Target/X86/X86FastISel.cpp
index 015306db6b4..fc3b4836c17 100644
--- a/llvm/lib/Target/X86/X86FastISel.cpp
+++ b/llvm/lib/Target/X86/X86FastISel.cpp
@@ -180,44 +180,6 @@ private:
 
 } // end anonymous namespace.
 
-static std::pair<X86::CondCode, bool>
-getX86ConditionCode(CmpInst::Predicate Predicate) {
-  X86::CondCode CC = X86::COND_INVALID;
-  bool NeedSwap = false;
-  switch (Predicate) {
-  default: break;
-  // Floating-point Predicates
-  case CmpInst::FCMP_UEQ: CC = X86::COND_E;       break;
-  case CmpInst::FCMP_OLT: NeedSwap = true;        LLVM_FALLTHROUGH;
-  case CmpInst::FCMP_OGT: CC = X86::COND_A;       break;
-  case CmpInst::FCMP_OLE: NeedSwap = true;        LLVM_FALLTHROUGH;
-  case CmpInst::FCMP_OGE: CC = X86::COND_AE;      break;
-  case CmpInst::FCMP_UGT: NeedSwap = true;        LLVM_FALLTHROUGH;
-  case CmpInst::FCMP_ULT: CC = X86::COND_B;       break;
-  case CmpInst::FCMP_UGE: NeedSwap = true;        LLVM_FALLTHROUGH;
-  case CmpInst::FCMP_ULE: CC = X86::COND_BE;      break;
-  case CmpInst::FCMP_ONE: CC = X86::COND_NE;      break;
-  case CmpInst::FCMP_UNO: CC = X86::COND_P;       break;
-  case CmpInst::FCMP_ORD: CC = X86::COND_NP;      break;
-  case CmpInst::FCMP_OEQ:                         LLVM_FALLTHROUGH;
-  case CmpInst::FCMP_UNE: CC = X86::COND_INVALID; break;
-
-  // Integer Predicates
-  case CmpInst::ICMP_EQ:  CC = X86::COND_E;       break;
-  case CmpInst::ICMP_NE:  CC = X86::COND_NE;      break;
-  case CmpInst::ICMP_UGT: CC = X86::COND_A;       break;
-  case CmpInst::ICMP_UGE: CC = X86::COND_AE;      break;
-  case CmpInst::ICMP_ULT: CC = X86::COND_B;       break;
-  case CmpInst::ICMP_ULE: CC = X86::COND_BE;      break;
-  case CmpInst::ICMP_SGT: CC = X86::COND_G;       break;
-  case CmpInst::ICMP_SGE: CC = X86::COND_GE;      break;
-  case CmpInst::ICMP_SLT: CC = X86::COND_L;       break;
-  case CmpInst::ICMP_SLE: CC = X86::COND_LE;      break;
-  }
-
-  return std::make_pair(CC, NeedSwap);
-}
-
 static std::pair<unsigned, bool>
 getX86SSEConditionCode(CmpInst::Predicate Predicate) {
   unsigned CC;
@@ -1559,7 +1521,7 @@ bool X86FastISel::X86SelectCmp(const Instruction *I) {
 
   X86::CondCode CC;
   bool SwapArgs;
-  std::tie(CC, SwapArgs) = getX86ConditionCode(Predicate);
+  std::tie(CC, SwapArgs) = X86::getX86ConditionCode(Predicate);
   assert(CC <= X86::LAST_VALID_COND && "Unexpected condition code.");
   unsigned Opc = X86::getSETFromCond(CC);
 
@@ -1697,7 +1659,7 @@ bool X86FastISel::X86SelectBranch(const Instruction *I) {
 
       bool SwapArgs;
       unsigned BranchOpc;
-      std::tie(CC, SwapArgs) = getX86ConditionCode(Predicate);
+      std::tie(CC, SwapArgs) = X86::getX86ConditionCode(Predicate);
       assert(CC <= X86::LAST_VALID_COND && "Unexpected condition code.");
 
       BranchOpc = X86::GetCondBranchFromCond(CC);
@@ -2070,7 +2032,7 @@ bool X86FastISel::X86FastEmitCMoveSelect(MVT RetVT, const Instruction *I) {
     }
 
     bool NeedSwap;
-    std::tie(CC, NeedSwap) = getX86ConditionCode(Predicate);
+    std::tie(CC, NeedSwap) = X86::getX86ConditionCode(Predicate);
     assert(CC <= X86::LAST_VALID_COND && "Unexpected condition code.");
 
     const Value *CmpLHS = CI->getOperand(0);
@@ -2319,7 +2281,7 @@ bool X86FastISel::X86FastEmitPseudoSelect(MVT RetVT, const Instruction *I) {
   const auto *CI = dyn_cast<CmpInst>(Cond);
   if (CI && (CI->getParent() == I->getParent())) {
     bool NeedSwap;
-    std::tie(CC, NeedSwap) = getX86ConditionCode(CI->getPredicate());
+    std::tie(CC, NeedSwap) = X86::getX86ConditionCode(CI->getPredicate());
     if (CC > X86::LAST_VALID_COND)
       return false;
 
diff --git a/llvm/lib/Target/X86/X86InstrInfo.cpp b/llvm/lib/Target/X86/X86InstrInfo.cpp
index 888daa27526..33c9fcf839e 100644
--- a/llvm/lib/Target/X86/X86InstrInfo.cpp
+++ b/llvm/lib/Target/X86/X86InstrInfo.cpp
@@ -5729,6 +5729,44 @@ static X86::CondCode getSwappedCondition(X86::CondCode CC) {
   }
 }
 
+std::pair<X86::CondCode, bool>
+X86::getX86ConditionCode(CmpInst::Predicate Predicate) {
+  X86::CondCode CC = X86::COND_INVALID;
+  bool NeedSwap = false;
+  switch (Predicate) {
+  default: break;
+  // Floating-point Predicates
+  case CmpInst::FCMP_UEQ: CC = X86::COND_E;       break;
+  case CmpInst::FCMP_OLT: NeedSwap = true;        LLVM_FALLTHROUGH;
+  case CmpInst::FCMP_OGT: CC = X86::COND_A;       break;
+  case CmpInst::FCMP_OLE: NeedSwap = true;        LLVM_FALLTHROUGH;
+  case CmpInst::FCMP_OGE: CC = X86::COND_AE;      break;
+  case CmpInst::FCMP_UGT: NeedSwap = true;        LLVM_FALLTHROUGH;
+  case CmpInst::FCMP_ULT: CC = X86::COND_B;       break;
+  case CmpInst::FCMP_UGE: NeedSwap = true;        LLVM_FALLTHROUGH;
+  case CmpInst::FCMP_ULE: CC = X86::COND_BE;      break;
+  case CmpInst::FCMP_ONE: CC = X86::COND_NE;      break;
+  case CmpInst::FCMP_UNO: CC = X86::COND_P;       break;
+  case CmpInst::FCMP_ORD: CC = X86::COND_NP;      break;
+  case CmpInst::FCMP_OEQ:                         LLVM_FALLTHROUGH;
+  case CmpInst::FCMP_UNE: CC = X86::COND_INVALID; break;
+
+  // Integer Predicates
+  case CmpInst::ICMP_EQ:  CC = X86::COND_E;       break;
+  case CmpInst::ICMP_NE:  CC = X86::COND_NE;      break;
+  case CmpInst::ICMP_UGT: CC = X86::COND_A;       break;
+  case CmpInst::ICMP_UGE: CC = X86::COND_AE;      break;
+  case CmpInst::ICMP_ULT: CC = X86::COND_B;       break;
+  case CmpInst::ICMP_ULE: CC = X86::COND_BE;      break;
+  case CmpInst::ICMP_SGT: CC = X86::COND_G;       break;
+  case CmpInst::ICMP_SGE: CC = X86::COND_GE;      break;
+  case CmpInst::ICMP_SLT: CC = X86::COND_L;       break;
+  case CmpInst::ICMP_SLE: CC = X86::COND_LE;      break;
+  }
+
+  return std::make_pair(CC, NeedSwap);
+}
+
 /// Return a set opcode for the given condition and
 /// whether it has memory operand.
 unsigned X86::getSETFromCond(CondCode CC, bool HasMemoryOperand) {
diff --git a/llvm/lib/Target/X86/X86InstrInfo.h b/llvm/lib/Target/X86/X86InstrInfo.h
index 6120541cc39..e64876073cc 100644
--- a/llvm/lib/Target/X86/X86InstrInfo.h
+++ b/llvm/lib/Target/X86/X86InstrInfo.h
@@ -64,6 +64,10 @@ enum CondCode {
 // Turn condition code into conditional branch opcode.
 unsigned GetCondBranchFromCond(CondCode CC);
 
+/// \brief Return a pair of condition code for the given predicate and whether
+/// the instruction operands should be swaped to match the condition code.
+std::pair<CondCode, bool> getX86ConditionCode(CmpInst::Predicate Predicate);
+
 /// \brief Return a set opcode for the given condition and whether it has
 /// a memory operand.
 unsigned getSETFromCond(CondCode CC, bool HasMemoryOperand = false);