sse: don't emit spurious moves

diff --git a/orc/orcrules-sse.c b/orc/orcrules-sse.c
index 4a0618f..1e6b5ad 100644 (file)
--- a/orc/orcrules-sse.c
+++ b/orc/orcrules-sse.c
@@ -90,6 +90,10 @@ orc_sse_emit_loadpq (OrcCompiler *p, int reg, int param)
 static void
 sse_rule_copyx (OrcCompiler *p, void *user, OrcInstruction *insn)
 {
+  if (p->vars[insn->src_args[0]].alloc == p->vars[insn->dest_args[0]].alloc) {
+    return;
+  }
+
   orc_sse_emit_movdqa (p,
       p->vars[insn->src_args[0]].alloc,
       p->vars[insn->dest_args[0]].alloc);

diff --git a/orc/orcsse.c b/orc/orcsse.c
index 1522ee6..d250950 100644 (file)
--- a/orc/orcsse.c
+++ b/orc/orcsse.c
@@ -239,6 +239,10 @@ orc_x86_emit_mov_sse_memoffset (OrcCompiler *compiler, int size, int reg1, int o
 
 void orc_x86_emit_mov_sse_reg_reg (OrcCompiler *compiler, int reg1, int reg2)
 {
+  if (reg1 == reg2) {
+    return;
+  }
+
   ORC_ASM_CODE(compiler,"  movdqa %%%s, %%%s\n", orc_x86_get_regname_sse(reg1),
         orc_x86_get_regname_sse(reg2));