From 6129e24e49f74f694575f9779055233fb1ab506e Mon Sep 17 00:00:00 2001
From: Dale Johannesen <dalej@apple.com>
Date: Wed, 4 Mar 2009 21:24:04 +0000
Subject: [PATCH] Re-commit 65975 and a fix for the problem that was causing
 llvm-gcc to fail to build.  I've verified it bootstraps now; good enough for
 me.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@66073 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/llvm/Intrinsics.td     | 2 ++
 lib/Transforms/Scalar/ADCE.cpp | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/include/llvm/Intrinsics.td b/include/llvm/Intrinsics.td
index 7c62096e5aa..6d008f3e3bf 100644
--- a/include/llvm/Intrinsics.td
+++ b/include/llvm/Intrinsics.td
@@ -261,6 +261,7 @@ let Properties = [IntrNoMem] in {
 //
 
 // None of these intrinsics accesses memory at all.
+let Properties = [IntrNoMem] in {
   def int_dbg_stoppoint    : Intrinsic<[llvm_void_ty],
                                        [llvm_i32_ty, llvm_i32_ty, 
                                         llvm_descriptor_ty]>;
@@ -269,6 +270,7 @@ let Properties = [IntrNoMem] in {
   def int_dbg_func_start   : Intrinsic<[llvm_void_ty], [llvm_descriptor_ty]>;
   def int_dbg_declare      : Intrinsic<[llvm_void_ty],
                                        [llvm_descriptor_ty, llvm_descriptor_ty]>;
+}
 
 //===------------------ Exception Handling Intrinsics----------------------===//
 //
diff --git a/lib/Transforms/Scalar/ADCE.cpp b/lib/Transforms/Scalar/ADCE.cpp
index bdf8029b18e..bfea2b27841 100644
--- a/lib/Transforms/Scalar/ADCE.cpp
+++ b/lib/Transforms/Scalar/ADCE.cpp
@@ -18,6 +18,7 @@
 #include "llvm/Transforms/Scalar.h"
 #include "llvm/BasicBlock.h"
 #include "llvm/Instructions.h"
+#include "llvm/IntrinsicInst.h"
 #include "llvm/Pass.h"
 #include "llvm/Support/CFG.h"
 #include "llvm/Support/Compiler.h"
@@ -55,6 +56,7 @@ bool ADCE::runOnFunction(Function& F) {
   // Collect the set of "root" instructions that are known live.
   for (inst_iterator I = inst_begin(F), E = inst_end(F); I != E; ++I)
     if (isa<TerminatorInst>(I.getInstructionIterator()) ||
+        isa<DbgInfoIntrinsic>(I.getInstructionIterator()) ||
         I->mayWriteToMemory()) {
       alive.insert(I.getInstructionIterator());
       worklist.push_back(I.getInstructionIterator());