From c6ada8e5f38168f13830e448f2b9e2d8e3eac72b Mon Sep 17 00:00:00 2001
From: Andrew Trick <atrick@apple.com>
Date: Fri, 25 Jan 2013 07:45:25 +0000
Subject: ScheduleDAG: colorize the DOT graph and improve formatting.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173431 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Support/GraphWriter.cpp | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'lib/Support/GraphWriter.cpp')

diff --git a/lib/Support/GraphWriter.cpp b/lib/Support/GraphWriter.cpp
index 669c238..bff182f 100644
--- a/lib/Support/GraphWriter.cpp
+++ b/lib/Support/GraphWriter.cpp
@@ -53,6 +53,17 @@ std::string llvm::DOT::EscapeString(const std::string &Label) {
   return Str;
 }
 
+/// \brief Get a color string for this node number. Simply round-robin selects
+/// from a reasonable number of colors.
+StringRef llvm::DOT::getColorString(unsigned ColorNumber) {
+  static const int NumColors = 20;
+  static const char* Colors[NumColors] = {
+    "aaaaaa", "aa0000", "00aa00", "aa5500", "0055ff", "aa00aa", "00aaaa",
+    "555555", "ff5555", "55ff55", "ffff55", "5555ff", "ff55ff", "55ffff",
+    "ffaaaa", "aaffaa", "ffffaa", "aaaaff", "ffaaff", "aaffff"};
+  return Colors[ColorNumber % NumColors];
+}
+
 // Execute the graph viewer. Return true if successful.
 static bool LLVM_ATTRIBUTE_UNUSED
 ExecGraphViewer(const sys::Path &ExecPath, std::vector<const char*> &args,
-- 
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