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re PR fortran/31711 (was "rhs array is changed while assiging to same lhs array")

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2007-04-29  Paul Thomas  <pault@gcc.gnu.org>

	PR fortran/31711
	* trans-array.c (gfc_conv_resolve_dependencies): Create a temp
	whenever a dependency is found.

2007-04-29  Paul Thomas  <pault@gcc.gnu.org>

	PR fortran/31711
	* gfortran.dg/dependency_21.f90: New test.

From-SVN: r124270
This commit is contained in:
Paul Thomas
2007-04-29 06:16:45 +00:00
parent d7f3a4ed79
commit 9d5833a6fe
4 changed files with 34 additions and 0 deletions
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6
gcc/fortran/ChangeLog
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@@ -1,3 +1,9 @@
2007-04-29 Paul Thomas <pault@gcc.gnu.org>
PR fortran/31711
* trans-array.c (gfc_conv_resolve_dependencies): Create a temp
whenever a dependency is found.
2007-04-27 Brooks Moses <brooks.moses@codesourcery.com>
* intrinsic.texi (Transfer): Improve documentation.

2
gcc/fortran/trans-array.c
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@@ -2826,6 +2826,8 @@ gfc_conv_resolve_dependencies (gfc_loopinfo * loop, gfc_ss * dest,
rref = ss->expr->ref;
nDepend = gfc_dep_resolver (lref, rref);
if (nDepend == 1)
break;
#if 0
/* TODO : loop shifting. */
if (nDepend == 1)

5
gcc/testsuite/ChangeLog
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@@ -1,3 +1,8 @@
2007-04-29 Paul Thomas <pault@gcc.gnu.org>
PR fortran/31711
* gfortran.dg/dependency_21.f90: New test.
2007-04-27 Ian Lance Taylor <iant@google.com>
PR middle-end/31710

21
gcc/testsuite/gfortran.dg/dependency_21.f90 Normal file
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@@ -0,0 +1,21 @@
! { dg-do run }
! Test the fix for PR31711 in which the dependency in the assignment
! at line 18 was detected and then ignored.
!
! Contributed by Tobias Ivarsson <thobes@gmail.com>
!
program laplsolv
IMPLICIT NONE
integer, parameter :: n = 2
double precision,dimension(0:n+1, 0:n+1) :: T
integer :: i
T=0.0
T(0:n+1 , 0) = 1.0
T(0:n+1 , n+1) = 1.0
T(n+1 , 0:n+1) = 2.0
T(1:n,1)=(T(0:n-1,1)+T(1:n,1+1)+1d0)
if (any (T(1:n,1) .ne. 1d0 )) call abort ()
end program laplsolv