From 2086af34d93415e8d01007ae6cff846ea677f254 Mon Sep 17 00:00:00 2001
From: Jon Michael Aanes <jonjmaa@gmail.com>
Date: Mon, 13 Nov 2017 18:14:53 +0100
Subject: [PATCH] Also silence yacc and stuff.

---
 llvm_emulator/emulator.py | 12 +++++++-----
 llvm_emulator/parser.py   |  4 ++--
 llvm_emulator/stepper.py  |  1 -
 3 files changed, 9 insertions(+), 8 deletions(-)

diff --git a/llvm_emulator/emulator.py b/llvm_emulator/emulator.py
index 41cf336..5bb4ee6 100644
--- a/llvm_emulator/emulator.py
+++ b/llvm_emulator/emulator.py
@@ -32,7 +32,7 @@ def main():
 
     global llvm_parser
     llvm_parser = parser.LLVMParser()
-    llvm_parser.build()
+    llvm_parser.build( parse_res['print_level'] <= 1 )
 
     if parse_res['auto_path'] is not None:
         step_behavior = {
@@ -47,11 +47,13 @@ def main():
 def go_auto(path_to_file, step_behavior):
     with open(path_to_file, 'r') as f:
         file_contents = f.read()
-    print('Parsing {}'
-          .format(path_to_file))
+    if step_behavior['step_print_level'] > 1:
+        print('Parsing {}'
+              .format(path_to_file))
     ast = llvm_parser.parse(file_contents)
-    print('Beginning execution of {}'
-          .format(path_to_file))
+    if step_behavior['step_print_level'] > 1:
+        print('Beginning execution of {}'
+              .format(path_to_file))
     stepper.auto_step(ast, step_behavior = step_behavior)
 
 
diff --git a/llvm_emulator/parser.py b/llvm_emulator/parser.py
index 3528864..95697bc 100644
--- a/llvm_emulator/parser.py
+++ b/llvm_emulator/parser.py
@@ -474,7 +474,7 @@ class LLVMParser(object):
     def __init__(self):
         self.tokens += self.reserved.values()
 
-    def build(self):
+    def build(self, silence_yacc=False):
         """
         Build the parser.
 
@@ -484,7 +484,7 @@ class LLVMParser(object):
 
         """
         self.lexer = lex.lex(module=self)
-        self.parser = yacc.yacc(module=self)
+        self.parser = yacc.yacc(module=self, errorlog=(silence_yacc and yacc.NullLogger() or None))
 
     def parse(self, text):
         """
diff --git a/llvm_emulator/stepper.py b/llvm_emulator/stepper.py
index 15b8d3d..2f306e1 100644
--- a/llvm_emulator/stepper.py
+++ b/llvm_emulator/stepper.py
@@ -643,7 +643,6 @@ def auto_step(ast, function_name='tigermain', function_args=[1234, 5678], step_b
     if True:
         global PRINT_LEVEL
         PRINT_LEVEL = step_behavior['step_print_level']
-    print(PRINT_LEVEL)
 
     #
     tdecls = ast.tdecls