From: Serge Pavlov <sepavloff@gmail.com>
Date: Tue, 24 Jan 2017 05:52:07 +0000 (+0000)
Subject: Make VerifyDomInfo and VerifyLoopInfo global variables
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=85a1ed1bcebe6f4f651404d0ccbbb865ecbe30f2;p=llvm

Make VerifyDomInfo and VerifyLoopInfo global variables

Verifications of dominator tree and loop info are expensive operations
so they are disabled by default. They can be enabled by command line
options -verify-dom-info and -verify-loop-info. These options however
enable checks only in files Dominators.cpp and LoopInfo.cpp. If some
transformation changes dominaror tree and/or loop info, it would be
convenient to place similar checks to the files implementing the
transformation.

This change makes corresponding flags global, so they can be used in
any file to optionally turn verification on.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@292889 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/include/llvm/Support/Debug.h b/include/llvm/Support/Debug.h
index 3465c403361..48e9e1bc167 100644
--- a/include/llvm/Support/Debug.h
+++ b/include/llvm/Support/Debug.h
@@ -33,11 +33,6 @@ namespace llvm {
 class raw_ostream;
 
 #ifndef NDEBUG
-/// DebugFlag - This boolean is set to true if the '-debug' command line option
-/// is specified.  This should probably not be referenced directly, instead, use
-/// the DEBUG macro below.
-///
-extern bool DebugFlag;
 
 /// isCurrentDebugType - Return true if the specified string is the debug type
 /// specified on the command line, or if none was specified on the command line
@@ -77,6 +72,29 @@ void setCurrentDebugTypes(const char **Types, unsigned Count);
 #define DEBUG_WITH_TYPE(TYPE, X) do { } while (false)
 #endif
 
+/// This boolean is set to true if the '-debug' command line option
+/// is specified.  This should probably not be referenced directly, instead, use
+/// the DEBUG macro below.
+///
+extern bool DebugFlag;
+
+/// \name Verification flags.
+///
+/// These flags turns on/off that are expensive and are turned off by default,
+/// unless macro EXPENSIVE_CHECKS is defined. The flags allow selectively
+/// turning the checks on without need to recompile.
+/// \{
+
+/// Enables verification of dominator trees.
+///
+extern bool VerifyDomInfo;
+
+/// Enables verification of loop info.
+///
+extern bool VerifyLoopInfo;
+
+///\}
+
 /// EnableDebugBuffering - This defaults to false.  If true, the debug
 /// stream will install signal handlers to dump any buffered debug
 /// output.  It allows clients to selectively allow the debug stream
diff --git a/lib/Analysis/LoopInfo.cpp b/lib/Analysis/LoopInfo.cpp
index e7e7612a66d..ff68810abb8 100644
--- a/lib/Analysis/LoopInfo.cpp
+++ b/lib/Analysis/LoopInfo.cpp
@@ -40,9 +40,9 @@ template class llvm::LoopInfoBase<BasicBlock, Loop>;
 
 // Always verify loopinfo if expensive checking is enabled.
 #ifdef EXPENSIVE_CHECKS
-static bool VerifyLoopInfo = true;
+bool llvm::VerifyLoopInfo = true;
 #else
-static bool VerifyLoopInfo = false;
+bool llvm::VerifyLoopInfo = false;
 #endif
 static cl::opt<bool,true>
 VerifyLoopInfoX("verify-loop-info", cl::location(VerifyLoopInfo),
diff --git a/lib/IR/Dominators.cpp b/lib/IR/Dominators.cpp
index 009326825cd..44948cc5831 100644
--- a/lib/IR/Dominators.cpp
+++ b/lib/IR/Dominators.cpp
@@ -29,9 +29,9 @@ using namespace llvm;
 
 // Always verify dominfo if expensive checking is enabled.
 #ifdef EXPENSIVE_CHECKS
-static bool VerifyDomInfo = true;
+bool llvm::VerifyDomInfo = true;
 #else
-static bool VerifyDomInfo = false;
+bool llvm::VerifyDomInfo = false;
 #endif
 static cl::opt<bool,true>
 VerifyDomInfoX("verify-dom-info", cl::location(VerifyDomInfo),