Blame 0072-tcg-optimize-optimize-op-r-a-a-mov-r-a.patch
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From e38329760e40a354e37d11c7f5d8c86cdb90736c Mon Sep 17 00:00:00 2001
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From: Aurelien Jarno <aurelien@aurel32.net>
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Date: Tue, 18 Sep 2012 19:11:32 +0200
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Subject: [PATCH] tcg/optimize: optimize "op r, a, a => mov r, a"
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Now that we can easily detect all copies, we can optimize the
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"op r, a, a => mov r, a" case a bit more.
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Reviewed-by: Richard Henderson <rth@twiddle.net>
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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/optimize.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/tcg/optimize.c b/tcg/optimize.c
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index aeb2225..b9a7da9 100644
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--- a/tcg/optimize.c
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+++ b/tcg/optimize.c
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@@ -524,7 +524,7 @@ static TCGArg *tcg_constant_folding(TCGContext *s, uint16_t *tcg_opc_ptr,
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switch (op) {
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CASE_OP_32_64(or):
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CASE_OP_32_64(and):
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- if (args[1] == args[2]) {
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+ if (temps_are_copies(args[1], args[2])) {
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if (temps_are_copies(args[0], args[1])) {
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gen_opc_buf[op_index] = INDEX_op_nop;
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} else {
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--
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1.7.12.1
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