* src/SDCCcse.c (findCheaperOp): fixed bug 1376320, copy signedness to replacing...

[fw/sdcc] / src / SDCCcse.c

diff --git a/src/SDCCcse.c b/src/SDCCcse.c
index e56c84a581551a5fe36ceee9f9654e18a225f3b7..35a5df940f476513025bc343d0386ae13e69f198 100644 (file)
--- a/src/SDCCcse.c
+++ b/src/SDCCcse.c
@@ -144,9 +144,11 @@ pcseDef (void *item, va_list ap)
 
 void ReplaceOpWithCheaperOp(operand **op, operand *cop) {
 #ifdef RANGEHUNT
-  printf ("ReplaceOpWithCheaperOp %s with %s: ",
-          IS_SYMOP((*op)) ? OP_SYMBOL((*op))->name : "!SYM",
-          IS_SYMOP(cop) ? OP_SYMBOL(cop)->name : "!SYM");
+  printf ("ReplaceOpWithCheaperOp\n\t");
+  printOperand (*op, stdout);
+  printf ("\nwith\t");
+  printOperand (cop, stdout);
+
   // if op is a register equivalent
   if (IS_ITEMP(cop) && IS_SYMOP((*op)) && OP_SYMBOL((*op))->isreqv) {
     operand **rop = &OP_SYMBOL((*op))->usl.spillLoc->reqv;
@@ -415,6 +417,15 @@ DEFSETFUNC (findCheaperOp)
           (*opp)->isaddr = cop->isaddr;
         }
 
+      /* copy signedness to literal operands */
+      if (IS_SPEC(operandType (cop)) && IS_SPEC(operandType (*opp))
+          && isOperandLiteral(*opp)
+          && SPEC_NOUN(operandType(*opp)) == SPEC_NOUN(operandType(cop))
+          && SPEC_USIGN(operandType(*opp)) != SPEC_USIGN(operandType(cop)))
+      {
+          SPEC_USIGN(operandType(*opp)) = SPEC_USIGN(operandType(cop));
+      }
+
       if (IS_SPEC(operandType (cop)) && IS_SPEC(operandType (*opp)) &&
           SPEC_NOUN(operandType(cop)) != SPEC_NOUN(operandType(*opp)))
         {