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From 1610a0e56c0be3e4bfd3034e5323188b1d05badd Mon Sep 17 00:00:00 2001
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From: Aurelien Jarno <aurelien@aurel32.net>
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Date: Mon, 10 Sep 2012 14:23:49 +0200
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Subject: [PATCH] tcg: mark set_label with TCG_OPF_BB_END flag
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set_label is effectively the end of a basic block, as no optimization
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can be made accross it. It was treated as such in the liveness analysis
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code, but as a special case.
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Mark it with TCG_OPF_BB_END flag so that this information can be used
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by other parts of the TCG code, and remove the special case in the liveness
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analysis code.
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Cc: Blue Swirl <blauwirbel@gmail.com>
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Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
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Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
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---
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tcg/tcg-opc.h | 2 +-
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tcg/tcg.c | 5 -----
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2 files changed, 1 insertion(+), 6 deletions(-)
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diff --git a/tcg/tcg-opc.h b/tcg/tcg-opc.h
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index 8e06d03..d12e8d0 100644
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--- a/tcg/tcg-opc.h
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+++ b/tcg/tcg-opc.h
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@@ -36,7 +36,7 @@ DEF(nopn, 0, 0, 1, 0) /* variable number of parameters */
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DEF(discard, 1, 0, 0, 0)
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-DEF(set_label, 0, 0, 1, 0)
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+DEF(set_label, 0, 0, 1, TCG_OPF_BB_END)
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DEF(call, 0, 1, 2, TCG_OPF_SIDE_EFFECTS) /* variable number of parameters */
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DEF(jmp, 0, 1, 0, TCG_OPF_BB_END | TCG_OPF_SIDE_EFFECTS)
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DEF(br, 0, 0, 1, TCG_OPF_BB_END | TCG_OPF_SIDE_EFFECTS)
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diff --git a/tcg/tcg.c b/tcg/tcg.c
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index 8386b70..c002a88 100644
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--- a/tcg/tcg.c
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+++ b/tcg/tcg.c
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@@ -1297,11 +1297,6 @@ static void tcg_liveness_analysis(TCGContext *s)
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args--;
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}
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break;
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- case INDEX_op_set_label:
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- args--;
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- /* mark end of basic block */
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- tcg_la_bb_end(s, dead_temps);
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- break;
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case INDEX_op_debug_insn_start:
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args -= def->nb_args;
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break;
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--
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1.7.12.1
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