Predefine the '__clang_analyzer__' macro when using '-analyze'.

llvm-svn: 104742

2 files changed, 9 insertions, 0 deletions

diff --git a/clang/lib/Frontend/InitPreprocessor.cpp b/clang/lib/Frontend/InitPreprocessor.cpp
index f1e9819d83c..2b35c8e2296 100644
--- a/clang/lib/Frontend/InitPreprocessor.cpp
+++ b/clang/lib/Frontend/InitPreprocessor.cpp
@@ -428,6 +428,11 @@ static void InitializePredefinedMacros(const TargetInfo &TI,
 
   if (FEOpts.ProgramAction == frontend::RewriteObjC)
     Builder.defineMacro("__weak", "__attribute__((objc_gc(weak)))");
+
+  // Define a macro that exists only when using the static analyzer.
+  if (FEOpts.ProgramAction == frontend::RunAnalysis)
+    Builder.defineMacro("__clang_analyzer__");
+
   // Get other target #defines.
   TI.getTargetDefines(LangOpts, Builder);
 }
diff --git a/clang/test/Analysis/misc-ps.m b/clang/test/Analysis/misc-ps.m
index 7061f6b2d10..8323c62390e 100644
--- a/clang/test/Analysis/misc-ps.m
+++ b/clang/test/Analysis/misc-ps.m
@@ -8,6 +8,10 @@
 // RUN: %clang_cc1 -triple x86_64-apple-darwin10 -analyze -analyzer-experimental-internal-checks -analyzer-check-objc-mem -analyzer-store=region -analyzer-constraints=basic -verify -fblocks -Wno-unreachable-code %s
 // RUN: %clang_cc1 -triple x86_64-apple-darwin10 -analyze -analyzer-experimental-internal-checks -analyzer-check-objc-mem -analyzer-store=region -analyzer-constraints=range -verify -fblocks -Wno-unreachable-code %s
 
+#ifndef __clang_analyzer__
+#error __clang__analyzer__ not defined
+#endif
+
 typedef struct objc_ivar *Ivar;
 typedef struct objc_selector *SEL;
 typedef signed char BOOL;