Add more support for intrinsic functions and for varargs stuff
llvm-svn: 6035
diff --git a/llvm/lib/VMCore/Function.cpp b/llvm/lib/VMCore/Function.cpp
index 3324565..0d5f90b 100644
--- a/llvm/lib/VMCore/Function.cpp
+++ b/llvm/lib/VMCore/Function.cpp
@@ -8,6 +8,7 @@
#include "llvm/Module.h"
#include "llvm/DerivedTypes.h"
#include "llvm/iOther.h"
+#include "llvm/Intrinsics.h"
#include "Support/LeakDetector.h"
#include "SymbolTableListTraitsImpl.h"
@@ -150,6 +151,41 @@
I->dropAllReferences();
}
+/// getIntrinsicID - This method returns the ID number of the specified
+/// function, or LLVMIntrinsic::not_intrinsic if the function is not an
+/// instrinsic, or if the pointer is null. This value is always defined to be
+/// zero to allow easy checking for whether a function is intrinsic or not. The
+/// particular intrinsic functions which correspond to this value are defined in
+/// llvm/Intrinsics.h.
+///
+unsigned Function::getIntrinsicID() const {
+ if (getName().size() <= 5 || getName()[4] != '.' || getName()[0] != 'l' ||
+ getName()[1] != 'l' || getName()[2] != 'v' || getName()[3] != 'm')
+ return 0; // All intrinsics start with 'llvm.'
+
+ switch (getName()[5]) {
+ case 'v':
+ if (getName().size() >= 9) {
+ switch (getName()[8]) {
+ case 's':
+ if (getName() == "llvm.va_start") return LLVMIntrinsic::va_start;
+ break;
+ case 'e':
+ if (getName() == "llvm.va_end") return LLVMIntrinsic::va_end;
+ break;
+ case 'c':
+ if (getName() == "llvm.va_copy") return LLVMIntrinsic::va_copy;
+ break;
+ }
+ }
+ break;
+ }
+ // The "llvm." namespace is reserved!
+ assert(0 && "Unknown LLVM intrinsic function!");
+ return 0;
+}
+
+
//===----------------------------------------------------------------------===//
// GlobalVariable Implementation
//===----------------------------------------------------------------------===//