diff options
Diffstat (limited to 'gcc/expr.c')
| -rw-r--r-- | gcc/expr.c | 19 |
1 files changed, 16 insertions, 3 deletions
@@ -8226,7 +8226,11 @@ expand_expr (exp, target, tmode, modifier) || mode != ptr_mode) { op0 = expand_expr (TREE_OPERAND (exp, 0), subtarget, VOIDmode, 0); - op1 = expand_expr (TREE_OPERAND (exp, 1), NULL_RTX, VOIDmode, 0); + if (! operand_equal_p (TREE_OPERAND (exp, 0), + TREE_OPERAND (exp, 1), 0)) + op1 = expand_expr (TREE_OPERAND (exp, 1), NULL_RTX, VOIDmode, 0); + else + op1 = op0; if (op0 == const0_rtx) return op1; if (op1 == const0_rtx) @@ -8235,7 +8239,12 @@ expand_expr (exp, target, tmode, modifier) } op0 = expand_expr (TREE_OPERAND (exp, 0), subtarget, VOIDmode, modifier); - op1 = expand_expr (TREE_OPERAND (exp, 1), NULL_RTX, VOIDmode, modifier); + if (! operand_equal_p (TREE_OPERAND (exp, 0), + TREE_OPERAND (exp, 1), 0)) + op1 = expand_expr (TREE_OPERAND (exp, 1), NULL_RTX, + VOIDmode, modifier); + else + op1 = op0; /* We come here from MINUS_EXPR when the second operand is a constant. */ @@ -8457,7 +8466,11 @@ expand_expr (exp, target, tmode, modifier) } } op0 = expand_expr (TREE_OPERAND (exp, 0), subtarget, VOIDmode, 0); - op1 = expand_expr (TREE_OPERAND (exp, 1), NULL_RTX, VOIDmode, 0); + if (! operand_equal_p (TREE_OPERAND (exp, 0), + TREE_OPERAND (exp, 1), 0)) + op1 = expand_expr (TREE_OPERAND (exp, 1), NULL_RTX, VOIDmode, 0); + else + op1 = op0; return expand_mult (mode, op0, op1, target, unsignedp); case TRUNC_DIV_EXPR: |