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1 files changed, 96 insertions, 0 deletions

diff --git a/gcc/testsuite/gfortran.dg/realloc_on_assign_12.f90 b/gcc/testsuite/gfortran.dg/realloc_on_assign_12.f90
new file mode 100644
index 000000000..3e0ceb1e3
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/realloc_on_assign_12.f90
@@ -0,0 +1,96 @@
+! { dg-do run }
+!
+! PR fortran/52151
+!
+! Check that the bounds/shape/strides are correctly set
+! for (re)alloc on assignment, if the LHS is either not
+! allocated or has the wrong shape. This test is for
+! code which is only invoked for libgfortran intrinsic
+! such as RESHAPE.
+!
+! Based on the example of PR 52117 by Steven Hirshman
+!
+    PROGRAM RESHAPEIT
+      call unalloc ()
+      call wrong_shape ()
+    contains
+    subroutine unalloc ()
+      INTEGER, PARAMETER :: n1=2, n2=2, n3=2
+      INTEGER            :: m1, m2, m3, lc
+      REAL, ALLOCATABLE  :: A(:,:), B(:,:,:)
+      REAL               :: val
+
+      ALLOCATE (A(n1,n2*n3))
+! << B is not allocated
+
+      val = 0
+      lc = 0
+      DO m3=1,n3
+         DO m2=1,n2
+            lc = lc+1
+            DO m1=1,n1
+               val = val+1
+               A(m1, lc) = val
+            END DO
+         END DO
+      END DO
+
+      B = RESHAPE(A, [n1,n2,n3])
+
+      if (any (shape (B)  /= [n1,n2,n3])) call abort ()
+      if (any (ubound (B) /= [n1,n2,n3])) call abort ()
+      if (any (lbound (B) /= [1,1,1])) call abort ()
+
+      lc = 0
+      DO m3=1,n3
+         DO m2=1,n2
+            lc = lc+1
+            DO m1=1,n1
+!               PRINT *,'A(',m1,',',lc,') = ',A(m1,lc),' B = ',B(m1,m2,m3)
+               if (A(m1,lc) /= B(m1,m2,m3)) call abort ()
+            END DO
+         END DO
+      END DO
+      DEALLOCATE(A, B)
+    end subroutine unalloc
+
+    subroutine wrong_shape ()
+      INTEGER, PARAMETER :: n1=2, n2=2, n3=2
+      INTEGER            :: m1, m2, m3, lc
+      REAL, ALLOCATABLE  :: A(:,:), B(:,:,:)
+      REAL               :: val
+
+      ALLOCATE (A(n1,n2*n3))
+      ALLOCATE (B(1,1,1))     ! << shape differs from RHS
+
+      val = 0
+      lc = 0
+      DO m3=1,n3
+         DO m2=1,n2
+            lc = lc+1
+            DO m1=1,n1
+               val = val+1
+               A(m1, lc) = val
+            END DO
+         END DO
+      END DO
+
+      B = RESHAPE(A, [n1,n2,n3])
+
+      if (any (shape (B)  /= [n1,n2,n3])) call abort ()
+      if (any (ubound (B) /= [n1,n2,n3])) call abort ()
+      if (any (lbound (B) /= [1,1,1])) call abort ()
+
+      lc = 0
+      DO m3=1,n3
+         DO m2=1,n2
+            lc = lc+1
+            DO m1=1,n1
+!               PRINT *,'A(',m1,',',lc,') = ',A(m1,lc),' B = ',B(m1,m2,m3)
+               if (A(m1,lc) /= B(m1,m2,m3)) call abort ()
+            END DO
+         END DO
+      END DO
+      DEALLOCATE(A, B)
+    end subroutine wrong_shape
+    END PROGRAM RESHAPEIT