[PATCH] Fix PR88021

[Richard Biener]

This reportedly fixes PR88021 - I forgot to change some ints to
lambda_ints when widening the representation of lambda_vectors.

Bootstrapped and tested on x86_64-unknown-linux-gnu, applied.

Richard.

2018-11-14  Richard Biener  <rguent...@suse.de>

        PR middle-end/88021
        * tree-data-ref.c (lambda_matrix_row_add): Change const1 argument
        to lambda_int.
        (lambda_vector_mult_const): Likewise.
        (lambda_matrix_right_hermite): Use lambda_int temporaries.

diff --git a/gcc/tree-data-ref.c b/gcc/tree-data-ref.c
index 0096afb9ba7..5b554b02b4a 100644
--- a/gcc/tree-data-ref.c
+++ b/gcc/tree-data-ref.c
@@ -3442,8 +3483,9 @@ lambda_matrix_id (lambda_matrix mat, int size)
       mat[i][j] = (i == j) ? 1 : 0;
 }
 
-/* Return the first nonzero element of vector VEC1 between START and N.
-   We must have START <= N.   Returns N if VEC1 is the zero vector.  */
+/* Return the index of the first nonzero element of vector VEC1 between
+   START and N.  We must have START <= N.
+   Returns N if VEC1 is the zero vector.  */
 
 static int
 lambda_vector_first_nz (lambda_vector vec1, int n, int start)
@@ -3458,7 +3500,8 @@ lambda_vector_first_nz (lambda_vector vec1, int n, int 
start)
    R2 = R2 + CONST1 * R1.  */
 
 static void
-lambda_matrix_row_add (lambda_matrix mat, int n, int r1, int r2, int const1)
+lambda_matrix_row_add (lambda_matrix mat, int n, int r1, int r2,
+                      lambda_int const1)
 {
   int i;
 
@@ -3474,7 +3517,7 @@ lambda_matrix_row_add (lambda_matrix mat, int n, int r1, 
int r2, int const1)
 
 static void
 lambda_vector_mult_const (lambda_vector vec1, lambda_vector vec2,
-                         int size, int const1)
+                         int size, lambda_int const1)
 {
   int i;
 
@@ -3539,7 +3582,7 @@ lambda_matrix_right_hermite (lambda_matrix A, int m, int 
n,
            {
              while (S[i][j] != 0)
                {
-                 int sigma, factor, a, b;
+                 lambda_int sigma, factor, a, b;
 
                  a = S[i-1][j];
                  b = S[i][j];