Basic DCE pass.

2013-12-07 02:18:26 -08:00
parent c2113c116d
commit 51d0be0f0a
11 changed files with 205 additions and 8 deletions
--- a/src/alloy/hir/function_builder.cc
+++ b/src/alloy/hir/function_builder.cc
@@ -374,14 +374,17 @@ void FunctionBuilder::Comment(const char* format, ...) {
  i->src2.value = i->src3.value = NULL;
 }

-void FunctionBuilder::Nop() {
+const OpcodeInfo* FunctionBuilder::GetNopOpcode() const {
  STATIC_OPCODE(
      OPCODE_NOP,
      "nop",
      OPCODE_SIG_X,
      OPCODE_FLAG_IGNORE);
+  return &opcode;
+}

-  Instr* i = AppendInstr(opcode, 0);
+void FunctionBuilder::Nop() {
+  Instr* i = AppendInstr(*GetNopOpcode(), 0);
  i->src1.value = i->src2.value = i->src3.value = NULL;
 }