Blame SOURCES/gcc34-rh233941.patch
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2007-04-02 Jakub Jelinek <jakub@redhat.com>
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* expr.c (expand_expr_real) <case COMPLEX_EXPR>: Force op1
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into register if target overlaps with op1.
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* g77.f-torture/execute/20070402.f: New test.
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--- gcc/expr.c.jj 2006-10-05 00:37:01.000000000 +0200
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+++ gcc/expr.c 2007-04-02 13:28:52.000000000 +0200
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@@ -8949,6 +8949,9 @@ expand_expr_real (tree exp, rtx target,
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if (! target)
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target = gen_reg_rtx (TYPE_MODE (TREE_TYPE (exp)));
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+ else if (GET_CODE (target) == MEM
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+ && reg_overlap_mentioned_p (target, op1))
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+ op1 = force_reg (mode, op1);
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start_sequence ();
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--- gcc/testsuite/g77.f-torture/execute/20070402.f.jj 2007-04-02 13:29:51.000000000 +0200
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+++ gcc/testsuite/g77.f-torture/execute/20070402.f 2007-04-02 12:11:00.000000000 +0200
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@@ -0,0 +1,21 @@
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+ program rh233941
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+ implicit none
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+ complex*16 z
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+ z = dcmplx(1.0, 2.0)
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+ call sub(z)
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+ stop
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+ end program rh233941
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+
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+ subroutine sub(z)
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+ implicit none
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+ complex*16 z
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+ z = dcmplx(-dimag(z), dreal(z))
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+ call sub2(z)
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+ return
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+ end subroutine sub
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+
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+ subroutine sub2(z)
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+ implicit none
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+ complex*16 z
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+ if (dreal(z).ne.-2.0.or.dimag(z).ne.1.0) call abort
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+ end subroutine sub2
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