diff options
| author | Jim Wilson <wilson@gcc.gnu.org> | 1993-09-28 16:00:13 -0700 |
|---|---|---|
| committer | Jim Wilson <wilson@gcc.gnu.org> | 1993-09-28 16:00:13 -0700 |
| commit | 1347292b885d50b86ca6eb5abe9583eac53911e5 (patch) | |
| tree | 1e0def9ccb38fef84e7248e32b64d18df6be6d12 | |
| parent | b5e962556704ca9d18aeaea01ee4cb41bebfb318 (diff) | |
| download | gcc-1347292b885d50b86ca6eb5abe9583eac53911e5.zip gcc-1347292b885d50b86ca6eb5abe9583eac53911e5.tar.gz gcc-1347292b885d50b86ca6eb5abe9583eac53911e5.tar.bz2 | |
(force_to_mode, LSHIFTRT case): Avoid shifts larger
than HOST_BITS_PER_WIDE_INT.
From-SVN: r5516
| -rw-r--r-- | gcc/combine.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/gcc/combine.c b/gcc/combine.c index d6ce034..45d572a 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -5771,10 +5771,12 @@ force_to_mode (x, mode, mask, reg) break; case LSHIFTRT: - /* Here we can only do something if the shift count is a constant and - we can do arithmetic in OP_MODE. */ + /* Here we can only do something if the shift count is a constant, + this shift constant is valid for the host, and we can do arithmetic + in OP_MODE. */ if (GET_CODE (XEXP (x, 1)) == CONST_INT + && INTVAL (XEXP (x, 1)) < HOST_BITS_PER_WIDE_INT && GET_MODE_BITSIZE (op_mode) <= HOST_BITS_PER_WIDE_INT) { rtx inner = XEXP (x, 0); |