Merge pull request #2096 from martin-frbg/eig-testing

Avoid out-of-bounds accesses in LAPACK EIG tests

Author: martin-frbg

lapack-netlib/TESTING/EIG/chet21.f

@@ -304,7 +304,8 @@ SUBROUTINE CHET21( ITYPE, UPLO, N, KBAND, A, LDA, D, E, U, LDU, V,
    10    CONTINUE
 *
          IF( N.GT.1 .AND. KBAND.EQ.1 ) THEN
-            DO 20 J = 1, N - 1
+CMK            DO 20 J = 1, N - 1
+            DO 20 J = 2, N - 1
                CALL CHER2( CUPLO, N, -CMPLX( E( J ) ), U( 1, J ), 1,
      $                     U( 1, J-1 ), 1, WORK, N )
    20       CONTINUE

lapack-netlib/TESTING/EIG/chpt21.f

@@ -323,7 +323,7 @@ SUBROUTINE CHPT21( ITYPE, UPLO, N, KBAND, AP, D, E, U, LDU, VP,
    10    CONTINUE
 *
          IF( N.GT.1 .AND. KBAND.EQ.1 ) THEN
-            DO 20 J = 1, N - 1
+            DO 20 J = 2, N - 1
                CALL CHPR2( CUPLO, N, -CMPLX( E( J ) ), U( 1, J ), 1,
      $                     U( 1, J-1 ), 1, WORK )
    20       CONTINUE

lapack-netlib/TESTING/EIG/zhet21.f

@@ -304,7 +304,8 @@ SUBROUTINE ZHET21( ITYPE, UPLO, N, KBAND, A, LDA, D, E, U, LDU, V,
    10    CONTINUE
 *
          IF( N.GT.1 .AND. KBAND.EQ.1 ) THEN
-            DO 20 J = 1, N - 1
+CMK            DO 20 J = 1, N - 1
+            DO 20 J = 2, N - 1
                CALL ZHER2( CUPLO, N, -DCMPLX( E( J ) ), U( 1, J ), 1,
      $                     U( 1, J-1 ), 1, WORK, N )
    20       CONTINUE

lapack-netlib/TESTING/EIG/zhpt21.f

@@ -323,7 +323,8 @@ SUBROUTINE ZHPT21( ITYPE, UPLO, N, KBAND, AP, D, E, U, LDU, VP,
    10    CONTINUE
 *
          IF( N.GT.1 .AND. KBAND.EQ.1 ) THEN
-            DO 20 J = 1, N - 1
+CMK            DO 20 J = 1, N - 1
+            DO 20 J = 2, N - 1
                CALL ZHPR2( CUPLO, N, -DCMPLX( E( J ) ), U( 1, J ), 1,
      $                     U( 1, J-1 ), 1, WORK )
    20       CONTINUE