Revert "make reciprocal estimate code generation more flexible by adding command-line options (2nd try)"

This reverts commit r238842.

It broke -DBUILD_SHARED_LIBS=ON build.

llvm-svn: 238900

1 files changed, 0 insertions, 225 deletions

diff --git a/llvm/lib/Target/TargetRecip.cpp b/llvm/lib/Target/TargetRecip.cpp
deleted file mode 100644
index 42bc487fe6d..00000000000
--- a/llvm/lib/Target/TargetRecip.cpp
+++ /dev/null
@@ -1,225 +0,0 @@
-//===-------------------------- TargetRecip.cpp ---------------------------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This class is used to customize machine-specific reciprocal estimate code
-// generation in a target-independent way.
-// If a target does not support operations in this specification, then code
-// generation will default to using supported operations.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/ADT/StringRef.h"
-#include "llvm/ADT/STLExtras.h"
-#include "llvm/Support/ErrorHandling.h"
-#include "llvm/Target/TargetRecip.h"
-#include <map>
-
-using namespace llvm;
-
-// These are the names of the individual reciprocal operations. These are
-// the key strings for queries and command-line inputs.
-// In addition, the command-line interface recognizes the global parameters
-// "all", "none", and "default".
-static const char *RecipOps[] = {
-  "divd",
-  "divf",
-  "vec-divd",
-  "vec-divf",
-  "sqrtd",
-  "sqrtf",
-  "vec-sqrtd",
-  "vec-sqrtf",
-};
-
-// The uninitialized state is needed for the enabled settings and refinement
-// steps because custom settings may arrive via the command-line before target
-// defaults are set.
-TargetRecip::TargetRecip() {
-  unsigned NumStrings = llvm::array_lengthof(RecipOps);
-  for (unsigned i = 0; i < NumStrings; ++i)
-    RecipMap.insert(std::make_pair(RecipOps[i], RecipParams()));
-}
-
-static bool parseRefinementStep(const StringRef &In, size_t &Position,
-                                uint8_t &Value) {
-  const char RefStepToken = ':';
-  Position = In.find(RefStepToken);
-  if (Position == StringRef::npos)
-    return false;
-
-  StringRef RefStepString = In.substr(Position + 1);
-  // Allow exactly one numeric character for the additional refinement
-  // step parameter.
-  if (RefStepString.size() == 1) {
-    char RefStepChar = RefStepString[0];
-    if (RefStepChar >= '0' && RefStepChar <= '9') {
-      Value = RefStepChar - '0';
-      return true;
-    }
-  }
-  report_fatal_error("Invalid refinement step for -recip.");
-}
-
-bool TargetRecip::parseGlobalParams(const std::string &Arg) {
-  StringRef ArgSub = Arg;
-
-  // Look for an optional setting of the number of refinement steps needed
-  // for this type of reciprocal operation.
-  size_t RefPos;
-  uint8_t RefSteps;
-  StringRef RefStepString;
-  if (parseRefinementStep(ArgSub, RefPos, RefSteps)) {
-    // Split the string for further processing.
-    RefStepString = ArgSub.substr(RefPos + 1);
-    ArgSub = ArgSub.substr(0, RefPos);
-  }
-  bool Enable;
-  bool UseDefaults;
-  if (ArgSub == "all") {
-    UseDefaults = false;
-    Enable = true;
-  } else if (ArgSub == "none") {
-    UseDefaults = false;
-    Enable = false;
-  } else if (ArgSub == "default") {
-    UseDefaults = true;
-  } else {
-    // Any other string is invalid or an individual setting.
-    return false;
-  }
-
-  // All enable values will be initialized to target defaults if 'default' was
-  // specified.
-  if (!UseDefaults)
-    for (auto &KV : RecipMap)
-      KV.second.Enabled = Enable;
-
-  // Custom refinement count was specified with all, none, or default.
-  if (!RefStepString.empty())
-    for (auto &KV : RecipMap)
-      KV.second.RefinementSteps = RefSteps;
-  
-  return true;
-}
-
-void TargetRecip::parseIndividualParams(const std::vector<std::string> &Args) {
-  static const char DisabledPrefix = '!';
-  unsigned NumArgs = Args.size();
-
-  for (unsigned i = 0; i != NumArgs; ++i) {
-    StringRef Val = Args[i];
-    
-    bool IsDisabled = Val[0] == DisabledPrefix;
-    // Ignore the disablement token for string matching.
-    if (IsDisabled)
-      Val = Val.substr(1);
-    
-    size_t RefPos;
-    uint8_t RefSteps;
-    StringRef RefStepString;
-    if (parseRefinementStep(Val, RefPos, RefSteps)) {
-      // Split the string for further processing.
-      RefStepString = Val.substr(RefPos + 1);
-      Val = Val.substr(0, RefPos);
-    }
-
-    RecipIter Iter = RecipMap.find(Val);
-    if (Iter == RecipMap.end()) {
-      // Try again specifying float suffix.
-      Iter = RecipMap.find(Val.str() + 'f');
-      if (Iter == RecipMap.end()) {
-        Iter = RecipMap.find(Val.str() + 'd');
-        assert(Iter == RecipMap.end() && "Float entry missing from map");
-        report_fatal_error("Invalid option for -recip.");
-      }
-      
-      // The option was specified without a float or double suffix.
-      if (RecipMap[Val.str() + 'd'].Enabled != Uninitialized) {
-        // Make sure that the double entry was not already specified.
-        // The float entry will be checked below.
-        report_fatal_error("Duplicate option for -recip.");
-      }
-    }
-    
-    if (Iter->second.Enabled != Uninitialized)
-      report_fatal_error("Duplicate option for -recip.");
-    
-    // Mark the matched option as found. Do not allow duplicate specifiers.
-    Iter->second.Enabled = !IsDisabled;
-    if (!RefStepString.empty())
-      Iter->second.RefinementSteps = RefSteps;
-    
-    // If the precision was not specified, the double entry is also initialized.
-    if (Val.back() != 'f' && Val.back() != 'd') {
-      RecipMap[Val.str() + 'd'].Enabled = !IsDisabled;
-      if (!RefStepString.empty())
-        RecipMap[Val.str() + 'd'].RefinementSteps = RefSteps;
-    }
-  }
-}
-
-TargetRecip::TargetRecip(const std::vector<std::string> &Args) :
-  TargetRecip() {
-  unsigned NumArgs = Args.size();
-
-  // Check if "all", "default", or "none" was specified.
-  if (NumArgs == 1 && parseGlobalParams(Args[0]))
-    return;
- 
-  parseIndividualParams(Args);
-}
-
-bool TargetRecip::isEnabled(const StringRef &Key) const {
-  ConstRecipIter Iter = RecipMap.find(Key);
-  assert(Iter != RecipMap.end() && "Unknown name for reciprocal map");
-  assert(Iter->second.Enabled != Uninitialized &&
-         "Enablement setting was not initialized");
-  return Iter->second.Enabled;
-}
-
-unsigned TargetRecip::getRefinementSteps(const StringRef &Key) const {
-  ConstRecipIter Iter = RecipMap.find(Key);
-  assert(Iter != RecipMap.end() && "Unknown name for reciprocal map");
-  assert(Iter->second.RefinementSteps != Uninitialized &&
-         "Refinement step setting was not initialized");
-  return Iter->second.RefinementSteps;
-}
-
-/// Custom settings (previously initialized values) override target defaults.
-void TargetRecip::setDefaults(const StringRef &Key, bool Enable,
-                              unsigned RefSteps) {
-  if (Key == "all") {
-    for (auto &KV : RecipMap) {
-      RecipParams &RP = KV.second;
-      if (RP.Enabled == Uninitialized)
-        RP.Enabled = Enable;
-      if (RP.RefinementSteps == Uninitialized)
-        RP.RefinementSteps = RefSteps;
-    }
-  } else {
-    RecipParams &RP = RecipMap[Key];
-    if (RP.Enabled == Uninitialized)
-      RP.Enabled = Enable;
-    if (RP.RefinementSteps == Uninitialized)
-      RP.RefinementSteps = RefSteps;
-  }
-}
-
-bool TargetRecip::operator==(const TargetRecip &Other) const {
-  for (const auto &KV : RecipMap) {
-    const StringRef &Op = KV.first;
-    const RecipParams &RP = KV.second;
-    const RecipParams &OtherRP = Other.RecipMap.find(Op)->second;
-    if (RP.RefinementSteps != OtherRP.RefinementSteps)
-      return false;
-    if (RP.Enabled != OtherRP.Enabled)
-      return false;
-  }
-  return true;
-}