Blame gcc32-rh149250.patch
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2002-09-08 Jan Hubicka <jh@suse.cz>
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* loop.c (loop_givs_reduce): Emit addition after.
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2005-07-19 Jakub Jelinek <jakub@redhat.com>
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* g77.dg/20050719-1.f: New test.
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--- gcc/loop.c.jj 2003-10-06 12:15:37.000000000 +0200
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+++ gcc/loop.c 2005-07-19 11:49:08.000000000 +0200
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@@ -4684,7 +4684,7 @@ loop_givs_reduce (loop, bl)
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rtx insert_before;
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if (! auto_inc_opt)
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- insert_before = tv->insn;
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+ insert_before = NEXT_INSN (tv->insn);
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else if (auto_inc_opt == 1)
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insert_before = NEXT_INSN (v->insn);
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else
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--- gcc/testsuite/g77.dg/20050719-1.f.jj 2005-07-19 12:00:18.000000000 +0200
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+++ gcc/testsuite/g77.dg/20050719-1.f 2005-07-19 12:01:31.000000000 +0200
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@@ -0,0 +1,37 @@
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+C Test for a strength reduction bug.
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+C { dg-do run }
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+C { dg-options "-O2 -fno-automatic" }
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+ SUBROUTINE FOO(D)
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+ INTEGER A,B,C,D,E,I,J,K
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+ DIMENSION A(5,5),B(5,5),C(5,5),D(5,5)
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+ DO I=1,5
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+ DO J=1,5
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+ A(I,J)=J
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+ B(I,J)=1
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+ ENDDO
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+ ENDDO
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+ DO I=1,5
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+ DO J=1,5
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+ E=0
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+ DO K=1,5
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+ E=E+B(I,K)*A(K,J)
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+ ENDDO
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+ C(I,J)=E
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+ ENDDO
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+ ENDDO
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+ DO I=1,5
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+ DO J=1,5
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+ D(I,J)=C(I,J)
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+ ENDDO
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+ ENDDO
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+ END
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+
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+ INTEGER D,I,J
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+ DIMENSION D(5,5)
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+ CALL FOO(D)
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+ DO I=1,5
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+ DO J=1,5
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+ IF (D(I,J).NE.5*J) CALL ABORT
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+ ENDDO
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+ ENDDO
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+ END
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