From a475ab7f02bbb859d49e4b0d18c07659b6fd4e48 Mon Sep 17 00:00:00 2001
From: Lang Hames <lhames@gmail.com>
Date: Tue, 20 Jul 2010 10:18:54 +0000
Subject: Use run-length encoding to represent identical adjacent cells in the
 pressure and interval table. Reduces output HTML file sizes by ~80% in my
 test cases.

Also fix access of private member type by << operator.

llvm-svn: 108823
---
 llvm/lib/CodeGen/RenderMachineFunction.h | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

(limited to 'llvm/lib/CodeGen/RenderMachineFunction.h')

diff --git a/llvm/lib/CodeGen/RenderMachineFunction.h b/llvm/lib/CodeGen/RenderMachineFunction.h
index 1e604da1381..090b03ecd65 100644
--- a/llvm/lib/CodeGen/RenderMachineFunction.h
+++ b/llvm/lib/CodeGen/RenderMachineFunction.h
@@ -223,6 +223,11 @@ namespace llvm {
                                const char *renderSuffix = 0);
 
   private:
+    class Spacer;
+
+    template <typename OStream>
+    friend OStream& operator<<(OStream &os, const Spacer &s);
+
 
     std::string fqn;
 
@@ -238,9 +243,12 @@ namespace llvm {
 
     // Utilities.
     typedef enum { Dead, Defined, Used, AliveReg, AliveStack } LiveState;
-
     LiveState getLiveStateAt(const LiveInterval *li, SlotIndex i) const;
 
+    typedef enum { Zero, Low, High } PressureState;
+    PressureState getPressureStateAt(const TargetRegisterClass *trc,
+                                     SlotIndex i) const;
+
     // ---------- Rendering methods ----------
 
     /// For inserting spaces when pretty printing.
@@ -286,6 +294,14 @@ namespace llvm {
     void renderPressureTableLegend(const Spacer &indent,
                                    OStream &os) const;
 
+    /// \brief Render a consecutive set of HTML cells of the same class using
+    /// the colspan attribute for run-length encoding.
+    template <typename OStream, typename CellType>
+    void renderCellsWithRLE(
+                     const Spacer &indent, OStream &os,
+                     const std::pair<CellType, unsigned> &rleAccumulator,
+                     const std::map<CellType, std::string> &cellTypeStrs) const;
+
     /// \brief Render code listing, potentially with register pressure
     ///        and live intervals shown alongside.
     template <typename OStream>
-- 
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