3 files changed, 33 insertions, 4 deletions
diff --git a/miasm2/jitter/codegen.py b/miasm2/jitter/codegen.py
index abba9843..69e83de5 100644
--- a/miasm2/jitter/codegen.py
+++ b/miasm2/jitter/codegen.py
@@ -8,6 +8,7 @@ from miasm2.ir.ir import IRBlock, AssignBlock
 
 from miasm2.ir.translators.C import TranslatorC, int_size_to_bn
 from miasm2.core.asmblock import AsmBlockBad
+from miasm2.expression.simplifications import expr_simp_high_to_explicit
 
 TRANSLATOR_NO_SYMBOL = TranslatorC(loc_db=None)
 
@@ -166,6 +167,13 @@ class CGen(object):
             irblock_head = self.assignblk_to_irbloc(instr, assignblk_head)
             irblocks = [irblock_head] + assignblks_extra
 
+            # Simplify high level operators
+            out = []
+            for irblock in irblocks:
+                new_irblock = irblock.simplify(expr_simp_high_to_explicit)[1]
+                out.append(new_irblock)
+            irblocks = out
+
             for irblock in irblocks:
                 assert irblock.dst is not None
             irblocks_list.append(irblocks)
diff --git a/miasm2/jitter/jitcore_python.py b/miasm2/jitter/jitcore_python.py
index 61bd98d0..b97727cd 100644
--- a/miasm2/jitter/jitcore_python.py
+++ b/miasm2/jitter/jitcore_python.py
@@ -1,7 +1,7 @@
 import miasm2.jitter.jitcore as jitcore
 import miasm2.expression.expression as m2_expr
 import miasm2.jitter.csts as csts
-from miasm2.expression.simplifications import ExpressionSimplifier
+from miasm2.expression.simplifications import ExpressionSimplifier, expr_simp_explicit
 from miasm2.jitter.emulatedsymbexec import EmulatedSymbExec
 
 ################################################################################
@@ -20,12 +20,11 @@ class JitCore_Python(jitcore.JitCore):
         self.ircfg = self.ir_arch.new_ircfg()
 
         # CPU & VM (None for now) will be set later
-        expr_simp = ExpressionSimplifier()
-        expr_simp.enable_passes(ExpressionSimplifier.PASS_COMMONS)
+
         self.symbexec = self.SymbExecClass(
             None, None,
             self.ir_arch, {},
-            sb_expr_simp=expr_simp
+            sb_expr_simp=expr_simp_explicit
         )
         self.symbexec.enable_emulated_simplifications()
 
diff --git a/miasm2/jitter/llvmconvert.py b/miasm2/jitter/llvmconvert.py
index 4a0eae93..de5f19df 100644
--- a/miasm2/jitter/llvmconvert.py
+++ b/miasm2/jitter/llvmconvert.py
@@ -830,6 +830,28 @@ class LLVMFunction():
                 self.update_cache(expr, ret)
                 return ret
 
+
+            if op.startswith('zeroExt_'):
+                arg = expr.args[0]
+                if expr.size == arg.size:
+                    return arg
+                new_expr = ExprCompose(arg, ExprInt(0, expr.size - arg.size))
+                return self.add_ir(new_expr)
+
+            if op.startswith("signExt_"):
+                arg = expr.args[0]
+                add_size = expr.size - arg.size
+                new_expr = ExprCompose(
+                    arg,
+                    ExprCond(
+                        arg.msb(),
+                        ExprInt(size2mask(add_size), add_size),
+                        ExprInt(0, add_size)
+                    )
+                )
+                return self.add_ir(new_expr)
+
+
             if op == "segm":
                 fc_ptr = self.mod.get_global("segm2addr")