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[Qemu-devel] [PATCH 7/8] tcg/optimize: Optmize ANDC X, Y, Y to MOV X, 0
From: |
Richard Henderson |
Subject: |
[Qemu-devel] [PATCH 7/8] tcg/optimize: Optmize ANDC X, Y, Y to MOV X, 0 |
Date: |
Fri, 31 Jan 2014 08:47:02 -0600 |
Like we already do for SUB and XOR.
Signed-off-by: Richard Henderson <address@hidden>
---
tcg/optimize.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index cdfc746..a703f8c 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -945,6 +945,7 @@ static TCGArg *tcg_constant_folding(TCGContext *s, uint16_t
*tcg_opc_ptr,
/* Simplify expression for "op r, a, a => movi r, 0" cases */
switch (op) {
+ CASE_OP_32_64(andc):
CASE_OP_32_64(sub):
CASE_OP_32_64(xor):
if (temps_are_copies(args[1], args[2])) {
--
1.8.5.3
- [Qemu-devel] [PATCH 0/8] tcg optimization improvements, Richard Henderson, 2014/01/31
- [Qemu-devel] [PATCH 1/8] tcg/optimize: fix known-zero bits for right shift ops, Richard Henderson, 2014/01/31
- [Qemu-devel] [PATCH 2/8] tcg/optimize: fix known-zero bits optimization, Richard Henderson, 2014/01/31
- [Qemu-devel] [PATCH 3/8] tcg/optimize: improve known-zero bits for 32-bit ops, Richard Henderson, 2014/01/31
- [Qemu-devel] [PATCH 4/8] tcg/optimize: add known-zero bits compute for load ops, Richard Henderson, 2014/01/31
- [Qemu-devel] [PATCH 5/8] tcg/optimize: Handle known-zeros masks for ANDC, Richard Henderson, 2014/01/31
- [Qemu-devel] [PATCH 6/8] tcg/optimize: Simply some logical ops to NOT, Richard Henderson, 2014/01/31
- [Qemu-devel] [PATCH 7/8] tcg/optimize: Optmize ANDC X, Y, Y to MOV X, 0,
Richard Henderson <=
- [Qemu-devel] [PATCH 8/8] tcg/optimize: Add more identity simplifications, Richard Henderson, 2014/01/31