diff options
Diffstat (limited to 'gcc/simplify-rtx.c')
| -rw-r--r-- | gcc/simplify-rtx.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/gcc/simplify-rtx.c b/gcc/simplify-rtx.c index 4ee63d2..d26267d 100644 --- a/gcc/simplify-rtx.c +++ b/gcc/simplify-rtx.c @@ -539,9 +539,15 @@ simplify_replace_fn_rtx (rtx x, const_rtx old_rtx, op0 = simplify_replace_fn_rtx (XEXP (x, 0), old_rtx, fn, data); op1 = simplify_replace_fn_rtx (XEXP (x, 1), old_rtx, fn, data); - /* (lo_sum (high x) x) -> x */ - if (GET_CODE (op0) == HIGH && rtx_equal_p (XEXP (op0, 0), op1)) - return op1; + /* (lo_sum (high x) y) -> y where x and y have the same base. */ + if (GET_CODE (op0) == HIGH) + { + rtx base0, base1, offset0, offset1; + split_const (XEXP (op0, 0), &base0, &offset0); + split_const (op1, &base1, &offset1); + if (rtx_equal_p (base0, base1)) + return op1; + } if (op0 == XEXP (x, 0) && op1 == XEXP (x, 1)) return x; |