Vendor import of llvm release_32 branch r168974 (effectively, 3.2 RC2):

http://llvm.org/svn/llvm-project/llvm/branches/release_32@168974

1 files changed, 48 insertions, 0 deletions

diff --git a/include/llvm/Transforms/Utils/IntegerDivision.h b/include/llvm/Transforms/Utils/IntegerDivision.h
new file mode 100644
index 0000000..cecc807
--- /dev/null
+++ b/include/llvm/Transforms/Utils/IntegerDivision.h
@@ -0,0 +1,48 @@
+//===- llvm/Transforms/Utils/IntegerDivision.h ------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains an implementation of 32bit integer division for targets
+// that don't have native support. It's largely derived from compiler-rt's
+// implementation of __udivsi3, but hand-tuned for targets that prefer less
+// control flow.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef TRANSFORMS_UTILS_INTEGERDIVISION_H
+#define TRANSFORMS_UTILS_INTEGERDIVISION_H
+
+namespace llvm {
+  class BinaryOperator;
+}
+
+namespace llvm {
+
+  /// Generate code to calculate the remainder of two integers, replacing Rem
+  /// with the generated code. This currently generates code using the udiv
+  /// expansion, but future work includes generating more specialized code,
+  /// e.g. when more information about the operands are known. Currently only
+  /// implements 32bit scalar division (due to udiv's limitation), but future
+  /// work is removing this limitation.
+  ///
+  /// @brief Replace Rem with generated code.
+  bool expandRemainder(BinaryOperator *Rem);
+
+  /// Generate code to divide two integers, replacing Div with the generated
+  /// code. This currently generates code similarly to compiler-rt's
+  /// implementations, but future work includes generating more specialized code
+  /// when more information about the operands are known. Currently only
+  /// implements 32bit scalar division, but future work is removing this
+  /// limitation.
+  ///
+  /// @brief Replace Div with generated code.
+  bool expandDivision(BinaryOperator* Div);
+
+} // End llvm namespace
+
+#endif