From dce4a407a24b04eebc6a376f8e62b41aaa7b071f Mon Sep 17 00:00:00 2001
From: Stephen Hines <srhines@google.com>
Date: Thu, 29 May 2014 02:49:00 -0700
Subject: Update LLVM for 3.5 rebase (r209712).

Change-Id: I149556c940fb7dc92d075273c87ff584f400941f
---
 lib/IR/DiagnosticInfo.cpp | 125 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 125 insertions(+)

(limited to 'lib/IR/DiagnosticInfo.cpp')

diff --git a/lib/IR/DiagnosticInfo.cpp b/lib/IR/DiagnosticInfo.cpp
index d59d4cf..6eeb162 100644
--- a/lib/IR/DiagnosticInfo.cpp
+++ b/lib/IR/DiagnosticInfo.cpp
@@ -12,18 +12,80 @@
 // Diagnostics reporting is still done as part of the LLVMContext.
 //===----------------------------------------------------------------------===//
 
+#include "LLVMContextImpl.h"
 #include "llvm/ADT/Twine.h"
 #include "llvm/IR/Constants.h"
+#include "llvm/IR/DebugInfo.h"
 #include "llvm/IR/DiagnosticInfo.h"
 #include "llvm/IR/DiagnosticPrinter.h"
 #include "llvm/IR/Function.h"
 #include "llvm/IR/Instruction.h"
 #include "llvm/IR/Metadata.h"
+#include "llvm/IR/Module.h"
 #include "llvm/Support/Atomic.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/Regex.h"
 #include <string>
 
 using namespace llvm;
 
+namespace {
+
+/// \brief Regular expression corresponding to the value given in one of the
+/// -pass-remarks* command line flags. Passes whose name matches this regexp
+/// will emit a diagnostic when calling the associated diagnostic function
+/// (emitOptimizationRemark, emitOptimizationRemarkMissed or
+/// emitOptimizationRemarkAnalysis).
+struct PassRemarksOpt {
+  std::shared_ptr<Regex> Pattern;
+
+  void operator=(const std::string &Val) {
+    // Create a regexp object to match pass names for emitOptimizationRemark.
+    if (!Val.empty()) {
+      Pattern = std::make_shared<Regex>(Val);
+      std::string RegexError;
+      if (!Pattern->isValid(RegexError))
+        report_fatal_error("Invalid regular expression '" + Val +
+                               "' in -pass-remarks: " + RegexError,
+                           false);
+    }
+  };
+};
+
+static PassRemarksOpt PassRemarksOptLoc;
+static PassRemarksOpt PassRemarksMissedOptLoc;
+static PassRemarksOpt PassRemarksAnalysisOptLoc;
+
+// -pass-remarks
+//    Command line flag to enable emitOptimizationRemark()
+static cl::opt<PassRemarksOpt, true, cl::parser<std::string>>
+PassRemarks("pass-remarks", cl::value_desc("pattern"),
+            cl::desc("Enable optimization remarks from passes whose name match "
+                     "the given regular expression"),
+            cl::Hidden, cl::location(PassRemarksOptLoc), cl::ValueRequired,
+            cl::ZeroOrMore);
+
+// -pass-remarks-missed
+//    Command line flag to enable emitOptimizationRemarkMissed()
+static cl::opt<PassRemarksOpt, true, cl::parser<std::string>> PassRemarksMissed(
+    "pass-remarks-missed", cl::value_desc("pattern"),
+    cl::desc("Enable missed optimization remarks from passes whose name match "
+             "the given regular expression"),
+    cl::Hidden, cl::location(PassRemarksMissedOptLoc), cl::ValueRequired,
+    cl::ZeroOrMore);
+
+// -pass-remarks-analysis
+//    Command line flag to enable emitOptimizationRemarkAnalysis()
+static cl::opt<PassRemarksOpt, true, cl::parser<std::string>>
+PassRemarksAnalysis(
+    "pass-remarks-analysis", cl::value_desc("pattern"),
+    cl::desc(
+        "Enable optimization analysis remarks from passes whose name match "
+        "the given regular expression"),
+    cl::Hidden, cl::location(PassRemarksAnalysisOptLoc), cl::ValueRequired,
+    cl::ZeroOrMore);
+}
+
 int llvm::getNextAvailablePluginDiagnosticKind() {
   static sys::cas_flag PluginKindID = DK_FirstPluginKind;
   return (int)sys::AtomicIncrement(&PluginKindID);
@@ -64,3 +126,66 @@ void DiagnosticInfoSampleProfile::print(DiagnosticPrinter &DP) const {
     DP << getFileName() << ": ";
   DP << getMsg();
 }
+
+bool DiagnosticInfoOptimizationRemarkBase::isLocationAvailable() const {
+  return getFunction().getParent()->getNamedMetadata("llvm.dbg.cu") != nullptr;
+}
+
+void DiagnosticInfoOptimizationRemarkBase::getLocation(StringRef *Filename,
+                                                       unsigned *Line,
+                                                       unsigned *Column) const {
+  DILocation DIL(getDebugLoc().getAsMDNode(getFunction().getContext()));
+  *Filename = DIL.getFilename();
+  *Line = DIL.getLineNumber();
+  *Column = DIL.getColumnNumber();
+}
+
+const std::string DiagnosticInfoOptimizationRemarkBase::getLocationStr() const {
+  StringRef Filename("<unknown>");
+  unsigned Line = 0;
+  unsigned Column = 0;
+  if (isLocationAvailable())
+    getLocation(&Filename, &Line, &Column);
+  return Twine(Filename + ":" + Twine(Line) + ":" + Twine(Column)).str();
+}
+
+void DiagnosticInfoOptimizationRemarkBase::print(DiagnosticPrinter &DP) const {
+  DP << getLocationStr() << ": " << getMsg();
+}
+
+bool DiagnosticInfoOptimizationRemark::isEnabled() const {
+  return PassRemarksOptLoc.Pattern &&
+         PassRemarksOptLoc.Pattern->match(getPassName());
+}
+
+bool DiagnosticInfoOptimizationRemarkMissed::isEnabled() const {
+  return PassRemarksMissedOptLoc.Pattern &&
+         PassRemarksMissedOptLoc.Pattern->match(getPassName());
+}
+
+bool DiagnosticInfoOptimizationRemarkAnalysis::isEnabled() const {
+  return PassRemarksAnalysisOptLoc.Pattern &&
+         PassRemarksAnalysisOptLoc.Pattern->match(getPassName());
+}
+
+void llvm::emitOptimizationRemark(LLVMContext &Ctx, const char *PassName,
+                                  const Function &Fn, const DebugLoc &DLoc,
+                                  const Twine &Msg) {
+  Ctx.diagnose(DiagnosticInfoOptimizationRemark(PassName, Fn, DLoc, Msg));
+}
+
+void llvm::emitOptimizationRemarkMissed(LLVMContext &Ctx, const char *PassName,
+                                        const Function &Fn,
+                                        const DebugLoc &DLoc,
+                                        const Twine &Msg) {
+  Ctx.diagnose(DiagnosticInfoOptimizationRemarkMissed(PassName, Fn, DLoc, Msg));
+}
+
+void llvm::emitOptimizationRemarkAnalysis(LLVMContext &Ctx,
+                                          const char *PassName,
+                                          const Function &Fn,
+                                          const DebugLoc &DLoc,
+                                          const Twine &Msg) {
+  Ctx.diagnose(
+      DiagnosticInfoOptimizationRemarkAnalysis(PassName, Fn, DLoc, Msg));
+}
-- 
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