Imported gcc-4.4.3

[msp430-gcc.git] / gcc / lambda-trans.c

diff --git a/gcc/lambda-trans.c b/gcc/lambda-trans.c
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+/* Lambda matrix transformations.
+   Copyright (C) 2003, 2004, 2007, 2008 Free Software Foundation, Inc.
+   Contributed by Daniel Berlin <dberlin@dberlin.org>.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 3, or (at your option) any later
+version.
+
+GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3.  If not see
+<http://www.gnu.org/licenses/>.  */
+
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
+#include "ggc.h"
+#include "tree.h"
+#include "target.h"
+#include "tree-flow.h"
+#include "lambda.h"
+
+/* Allocate a new transformation matrix.  */
+
+lambda_trans_matrix
+lambda_trans_matrix_new (int colsize, int rowsize)
+{
+  lambda_trans_matrix ret;
+  
+  ret = GGC_NEW (struct lambda_trans_matrix_s);
+  LTM_MATRIX (ret) = lambda_matrix_new (rowsize, colsize);
+  LTM_ROWSIZE (ret) = rowsize;
+  LTM_COLSIZE (ret) = colsize;
+  LTM_DENOMINATOR (ret) = 1;
+  return ret;
+}
+
+/* Return true if MAT is an identity matrix.  */
+
+bool
+lambda_trans_matrix_id_p (lambda_trans_matrix mat)
+{
+  if (LTM_ROWSIZE (mat) != LTM_COLSIZE (mat))
+    return false;
+  return lambda_matrix_id_p (LTM_MATRIX (mat), LTM_ROWSIZE (mat));
+}
+
+
+/* Compute the inverse of the transformation matrix MAT.  */
+
+lambda_trans_matrix 
+lambda_trans_matrix_inverse (lambda_trans_matrix mat)
+{
+  lambda_trans_matrix inverse;
+  int determinant;
+  
+  inverse = lambda_trans_matrix_new (LTM_ROWSIZE (mat), LTM_COLSIZE (mat));
+  determinant = lambda_matrix_inverse (LTM_MATRIX (mat), LTM_MATRIX (inverse), 
+                                      LTM_ROWSIZE (mat));
+  LTM_DENOMINATOR (inverse) = determinant;
+  return inverse;
+}
+
+
+/* Print out a transformation matrix.  */
+
+void
+print_lambda_trans_matrix (FILE *outfile, lambda_trans_matrix mat)
+{
+  print_lambda_matrix (outfile, LTM_MATRIX (mat), LTM_ROWSIZE (mat), 
+                      LTM_COLSIZE (mat));
+}