[Qemu-devel] [PATCH v2 01/10] tcg: Add logical simplifications during gvec expand

[Richard Henderson]

We handle many of these during integer expansion, and the
rest of them during integer optimization.

Reviewed-by: David Gibson <da...@gibson.dropbear.id.au>
Signed-off-by: Richard Henderson <richard.hender...@linaro.org>
---
 tcg/tcg-op-gvec.c | 35 ++++++++++++++++++++++++++++++-----
 1 file changed, 30 insertions(+), 5 deletions(-)

diff --git a/tcg/tcg-op-gvec.c b/tcg/tcg-op-gvec.c
index 61c25f5784..ec231b78fb 100644
--- a/tcg/tcg-op-gvec.c
+++ b/tcg/tcg-op-gvec.c
@@ -1840,7 +1840,12 @@ void tcg_gen_gvec_and(unsigned vece, uint32_t dofs, 
uint32_t aofs,
         .opc = INDEX_op_and_vec,
         .prefer_i64 = TCG_TARGET_REG_BITS == 64,
     };
-    tcg_gen_gvec_3(dofs, aofs, bofs, oprsz, maxsz, &g);
+
+    if (aofs == bofs) {
+        tcg_gen_gvec_mov(vece, dofs, aofs, oprsz, maxsz);
+    } else {
+        tcg_gen_gvec_3(dofs, aofs, bofs, oprsz, maxsz, &g);
+    }
 }
 
 void tcg_gen_gvec_or(unsigned vece, uint32_t dofs, uint32_t aofs,
@@ -1853,7 +1858,12 @@ void tcg_gen_gvec_or(unsigned vece, uint32_t dofs, 
uint32_t aofs,
         .opc = INDEX_op_or_vec,
         .prefer_i64 = TCG_TARGET_REG_BITS == 64,
     };
-    tcg_gen_gvec_3(dofs, aofs, bofs, oprsz, maxsz, &g);
+
+    if (aofs == bofs) {
+        tcg_gen_gvec_mov(vece, dofs, aofs, oprsz, maxsz);
+    } else {
+        tcg_gen_gvec_3(dofs, aofs, bofs, oprsz, maxsz, &g);
+    }
 }
 
 void tcg_gen_gvec_xor(unsigned vece, uint32_t dofs, uint32_t aofs,
@@ -1866,7 +1876,12 @@ void tcg_gen_gvec_xor(unsigned vece, uint32_t dofs, 
uint32_t aofs,
         .opc = INDEX_op_xor_vec,
         .prefer_i64 = TCG_TARGET_REG_BITS == 64,
     };
-    tcg_gen_gvec_3(dofs, aofs, bofs, oprsz, maxsz, &g);
+
+    if (aofs == bofs) {
+        tcg_gen_gvec_dup8i(dofs, oprsz, maxsz, 0);
+    } else {
+        tcg_gen_gvec_3(dofs, aofs, bofs, oprsz, maxsz, &g);
+    }
 }
 
 void tcg_gen_gvec_andc(unsigned vece, uint32_t dofs, uint32_t aofs,
@@ -1879,7 +1894,12 @@ void tcg_gen_gvec_andc(unsigned vece, uint32_t dofs, 
uint32_t aofs,
         .opc = INDEX_op_andc_vec,
         .prefer_i64 = TCG_TARGET_REG_BITS == 64,
     };
-    tcg_gen_gvec_3(dofs, aofs, bofs, oprsz, maxsz, &g);
+
+    if (aofs == bofs) {
+        tcg_gen_gvec_dup8i(dofs, oprsz, maxsz, 0);
+    } else {
+        tcg_gen_gvec_3(dofs, aofs, bofs, oprsz, maxsz, &g);
+    }
 }
 
 void tcg_gen_gvec_orc(unsigned vece, uint32_t dofs, uint32_t aofs,
@@ -1892,7 +1912,12 @@ void tcg_gen_gvec_orc(unsigned vece, uint32_t dofs, 
uint32_t aofs,
         .opc = INDEX_op_orc_vec,
         .prefer_i64 = TCG_TARGET_REG_BITS == 64,
     };
-    tcg_gen_gvec_3(dofs, aofs, bofs, oprsz, maxsz, &g);
+
+    if (aofs == bofs) {
+        tcg_gen_gvec_dup8i(dofs, oprsz, maxsz, -1);
+    } else {
+        tcg_gen_gvec_3(dofs, aofs, bofs, oprsz, maxsz, &g);
+    }
 }
 
 static const GVecGen2s gop_ands = {
-- 
2.17.2