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riscv-gcc-1
Commit 3c9b0091 by Richard Kenner
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(operand_equal_p): Constants are not equal if there has been an overflow. 

From-SVN: r13949
parent 116758a7
Showing with 7 additions and 2 deletions
gcc/fold-const.c
...@@ -1759,11 +1759,16 @@ operand_equal_p (arg0, arg1, only_const) ...@@ -1759,11 +1759,16 @@ operand_equal_p (arg0, arg1, only_const)
switch (TREE_CODE (arg0)) switch (TREE_CODE (arg0))
{ {
case INTEGER_CST: case INTEGER_CST:
return (TREE_INT_CST_LOW (arg0) == TREE_INT_CST_LOW (arg1) return (! TREE_CONSTANT_OVERFLOW (arg0)
&& ! TREE_CONSTANT_OVERFLOW (arg1)
&& TREE_INT_CST_LOW (arg0) == TREE_INT_CST_LOW (arg1)
&& TREE_INT_CST_HIGH (arg0) == TREE_INT_CST_HIGH (arg1)); && TREE_INT_CST_HIGH (arg0) == TREE_INT_CST_HIGH (arg1));
case REAL_CST: case REAL_CST:
return REAL_VALUES_EQUAL (TREE_REAL_CST (arg0), TREE_REAL_CST (arg1)); return (! TREE_CONSTANT_OVERFLOW (arg0)
&& ! TREE_CONSTANT_OVERFLOW (arg1)
&& REAL_VALUES_EQUAL (TREE_REAL_CST (arg0),
TREE_REAL_CST (arg1)));
case COMPLEX_CST: case COMPLEX_CST:
return (operand_equal_p (TREE_REALPART (arg0), TREE_REALPART (arg1), return (operand_equal_p (TREE_REALPART (arg0), TREE_REALPART (arg1),
......
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