Added Mac OS X assembler style conditional assembly. I may come back and see if
I can clean this up a bit more and do way with the TheCondState and just use
the top element on the TheCondStack if not empty. Also may tweak the code
around ParseConditionalAssemblyDirectives() to simplify the AsmParser code.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78423 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/llvm-mc/AsmCond.h b/tools/llvm-mc/AsmCond.h
new file mode 100644
index 0000000..17201b9
--- /dev/null
+++ b/tools/llvm-mc/AsmCond.h
@@ -0,0 +1,38 @@
+//===- AsmCond.h - Assembly file conditional assembly ----------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef ASMCOND_H
+#define ASMCOND_H
+
+namespace llvm {
+
+/// AsmCond - Class to support conditional assembly
+///
+/// The conditional assembly feature (.if, .else, .elseif and .endif) is
+/// implemented with AsmCond that tells us what we are in the middle of
+/// processing. Ignore can be either true or false. When true we are ignoring
+/// the block of code in the middle of a conditional.
+
+class AsmCond {
+public:
+ enum ConditionalAssemblyType {
+ NoCond, // no conditional is being processed
+ IfCond, // inside if conditional
+ ElseIfCond, // inside elseif conditional
+ ElseCond // inside else conditional
+ };
+
+ ConditionalAssemblyType TheCond;
+ bool CondMet;
+ bool Ignore;
+};
+
+} // end namespace llvm
+
+#endif