m68k.c (notice_update_cc): Handle register conflict with PRE_DEC.
* config/m68k/m68k.c (notice_update_cc): Handle register conflict with PRE_DEC. From-SVN: r203922
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2013-10-22 Andreas Schwab <schwab@suse.de>
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* config/m68k/m68k.c (notice_update_cc): Handle register conflict
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with PRE_DEC.
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2013-10-22 Paolo Carlini <paolo.carlini@oracle.com>
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* doc/contrib.texi ([Fran@,{c}ois Dumont], [Tim Shen],
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@ -4209,6 +4209,13 @@ notice_update_cc (rtx exp, rtx insn)
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&& cc_status.value2
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&& reg_overlap_mentioned_p (cc_status.value1, cc_status.value2))
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cc_status.value2 = 0;
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/* Check for PRE_DEC in dest modifying a register used in src. */
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if (cc_status.value1 && GET_CODE (cc_status.value1) == MEM
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&& GET_CODE (XEXP (cc_status.value1, 0)) == PRE_DEC
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&& cc_status.value2
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&& reg_overlap_mentioned_p (XEXP (XEXP (cc_status.value1, 0), 0),
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cc_status.value2))
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cc_status.value2 = 0;
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if (((cc_status.value1 && FP_REG_P (cc_status.value1))
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|| (cc_status.value2 && FP_REG_P (cc_status.value2))))
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cc_status.flags = CC_IN_68881;
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