From 1caa54d87fedd079b9d7a889ffeb6425b0dd5d24 Mon Sep 17 00:00:00 2001
From: Alon Zakai <alonzakai@gmail.com>
Date: Wed, 15 Jan 2014 17:30:22 -0800
Subject: share block ids in relooper among split blocks

---
 src/relooper/Relooper.cpp | 7 +++----
 src/relooper/Relooper.h   | 4 ++--
 src/relooper/test.txt     | 4 ++--
 tools/shared.py           | 2 +-
 4 files changed, 8 insertions(+), 9 deletions(-)

diff --git a/src/relooper/Relooper.cpp b/src/relooper/Relooper.cpp
index d5772c62..05c90a38 100644
--- a/src/relooper/Relooper.cpp
+++ b/src/relooper/Relooper.cpp
@@ -391,8 +391,8 @@ Relooper::~Relooper() {
   for (unsigned i = 0; i < Shapes.size(); i++) delete Shapes[i];
 }
 
-void Relooper::AddBlock(Block *New) {
-  New->Id = BlockIdCounter++;
+void Relooper::AddBlock(Block *New, int Id) {
+  New->Id = Id == -1 ? BlockIdCounter++ : Id;
   Blocks.push_back(New);
 }
 
@@ -446,8 +446,7 @@ void Relooper::Calculate(Block *Entry) {
         for (BlockSet::iterator iter = Original->BranchesIn.begin(); iter != Original->BranchesIn.end(); iter++) {
           Block *Prior = *iter;
           Block *Split = new Block(Original->Code, Original->BranchVar);
-          Parent->AddBlock(Split);
-          PrintDebug("  to %d\n", Split->Id);
+          Parent->AddBlock(Split, Original->Id);
           Split->BranchesIn.insert(Prior);
           Branch *Details = Prior->BranchesOut[Original];
           Prior->BranchesOut[Split] = new Branch(Details->Condition, Details->Code);
diff --git a/src/relooper/Relooper.h b/src/relooper/Relooper.h
index 6b9394db..85adf359 100644
--- a/src/relooper/Relooper.h
+++ b/src/relooper/Relooper.h
@@ -57,7 +57,7 @@ struct Block {
   BlockBranchMap ProcessedBranchesOut;
   BlockSet ProcessedBranchesIn;
   Shape *Parent; // The shape we are directly inside
-  int Id; // A unique identifier, defined when added to relooper
+  int Id; // A unique identifier, defined when added to relooper. Note that this uniquely identifies a *logical* block - if we split it, the two instances have the same content *and* the same Id
   const char *Code; // The string representation of the code in this block. Owning pointer (we copy the input)
   const char *BranchVar; // If we have more than one branch out, the variable whose value determines where we go
   bool IsCheckedMultipleEntry; // If true, we are a multiple entry, so reaching us requires setting the label variable
@@ -191,7 +191,7 @@ struct Relooper {
   Relooper();
   ~Relooper();
 
-  void AddBlock(Block *New);
+  void AddBlock(Block *New, int Id=-1);
 
   // Calculates the shapes
   void Calculate(Block *Entry);
diff --git a/src/relooper/test.txt b/src/relooper/test.txt
index cb02b867..82b02ad7 100644
--- a/src/relooper/test.txt
+++ b/src/relooper/test.txt
@@ -91,7 +91,7 @@
   }
   default: {
    var $x_1 = $x_0; 
-   label = 8;
+   label = 7;
    break L1;
   }
   }
@@ -106,7 +106,7 @@
   }
   }
  }
- if (label == 8) {
+ if (label == 7) {
   // code 7
  }
  // code 4
diff --git a/tools/shared.py b/tools/shared.py
index 2ae37f91..412b51f5 100644
--- a/tools/shared.py
+++ b/tools/shared.py
@@ -345,7 +345,7 @@ def find_temp_directory():
 # we re-check sanity when the settings are changed)
 # We also re-check sanity and clear the cache when the version changes
 
-EMSCRIPTEN_VERSION = '1.9.0'
+EMSCRIPTEN_VERSION = '1.9.1'
 
 def generate_sanity():
   return EMSCRIPTEN_VERSION + '|' + get_llvm_target() + '|' + LLVM_ROOT + '|' + get_clang_version()
-- 
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