[llvm-commits] CVS: llvm/lib/CodeGen/IntrinsicLowering.cpp
Chris Lattner
lattner at cs.uiuc.edu
Sun Dec 28 02:20:01 PST 2003
Changes in directory llvm/lib/CodeGen:
IntrinsicLowering.cpp added (r1.1)
---
Log message:
Implement the default implementation of the intrinsic lowering class
---
Diffs of the changes: (+57 -0)
Index: llvm/lib/CodeGen/IntrinsicLowering.cpp
diff -c /dev/null llvm/lib/CodeGen/IntrinsicLowering.cpp:1.1
*** /dev/null Sun Dec 28 02:19:51 2003
--- llvm/lib/CodeGen/IntrinsicLowering.cpp Sun Dec 28 02:19:41 2003
***************
*** 0 ****
--- 1,57 ----
+ //===-- IntrinsicLowering.cpp - Intrinsic Lowering default implementation -===//
+ //
+ // The LLVM Compiler Infrastructure
+ //
+ // This file was developed by the LLVM research group and is distributed under
+ // the University of Illinois Open Source License. See LICENSE.TXT for details.
+ //
+ //===----------------------------------------------------------------------===//
+ //
+ // This file implements the default intrinsic lowering implementation.
+ //
+ //===----------------------------------------------------------------------===//
+
+ #include "llvm/CodeGen/IntrinsicLowering.h"
+ #include "llvm/Constant.h"
+ #include "llvm/Intrinsics.h"
+ #include "llvm/Module.h"
+ #include "llvm/Type.h"
+ #include "llvm/iOther.h"
+ using namespace llvm;
+
+ void DefaultIntrinsicLowering::LowerIntrinsicCall(CallInst *CI) {
+ Function *Callee = CI->getCalledFunction();
+ assert(Callee && "Cannot lower an indirect call!");
+
+ Module *M = Callee->getParent();
+
+ switch (Callee->getIntrinsicID()) {
+ case Intrinsic::not_intrinsic:
+ std::cerr << "Cannot lower a call to a non-intrinsic function '"
+ << Callee->getName() << "'!\n";
+ abort();
+ default:
+ std::cerr << "Error: Code generator does not support intrinsic function '"
+ << Callee->getName() << "'!\n";
+ abort();
+
+ // The default implementation of setjmp/longjmp transforms setjmp into a
+ // noop that always returns zero and longjmp into a call to abort. This
+ // allows code that never longjmps to work correctly.
+ case Intrinsic::setjmp:
+ case Intrinsic::sigsetjmp:
+ if (CI->getType() != Type::VoidTy)
+ CI->replaceAllUsesWith(Constant::getNullValue(CI->getType()));
+ break;
+
+ case Intrinsic::longjmp:
+ case Intrinsic::siglongjmp:
+ // Insert the call to abort
+ new CallInst(M->getOrInsertFunction("abort", Type::VoidTy, 0), "", CI);
+ break;
+ }
+
+ assert(CI->use_empty() &&
+ "Lowering should have eliminated any uses of the intrinsic call!");
+ CI->getParent()->getInstList().erase(CI);
+ }
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