Patchwork [v2,3/9] tcg/optimize: simplify or/xor r, a, 0 cases

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Submitter Aurelien Jarno
Date Sept. 7, 2012, 1:16 p.m.
Message ID <1347023792-24045-4-git-send-email-aurelien@aurel32.net>
Download mbox | patch
Permalink /patch/182378/
State New
Headers show

Comments

Aurelien Jarno - Sept. 7, 2012, 1:16 p.m.
or/xor r, a, 0 is equivalent to a mov r, a.

Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
---
 tcg/optimize.c |    2 ++
 1 file changed, 2 insertions(+)

Patch

diff --git a/tcg/optimize.c b/tcg/optimize.c
index 63f970d..0db849e 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -331,6 +331,8 @@  static TCGArg *tcg_constant_folding(TCGContext *s, uint16_t *tcg_opc_ptr,
         CASE_OP_32_64(sar):
         CASE_OP_32_64(rotl):
         CASE_OP_32_64(rotr):
+        CASE_OP_32_64(or):
+        CASE_OP_32_64(xor):
             if (temps[args[1]].state == TCG_TEMP_CONST) {
                 /* Proceed with possible constant folding. */
                 break;