diff options
| author | Jan Hubicka <jh@suse.cz> | 2000-07-30 18:35:53 +0000 |
|---|---|---|
| committer | Jan Hubicka <hubicka@gcc.gnu.org> | 2000-07-30 18:35:53 +0000 |
| commit | 49219895115ee8d9391c29912b057a7a7f58807b (patch) | |
| tree | 7013ddfaa893aa1d122d9f7e462aa5eb0c926e59 /gcc/combine.c | |
| parent | 25af74a0a73a453dccba99e7c91fbfd5d2fe1a53 (diff) | |
| download | gcc-49219895115ee8d9391c29912b057a7a7f58807b.zip gcc-49219895115ee8d9391c29912b057a7a7f58807b.tar.gz gcc-49219895115ee8d9391c29912b057a7a7f58807b.tar.bz2 | |
* combine.c (if_then_else_cond): Be sure that mode fits in HOST_WIDE_INT
From-SVN: r35347
Diffstat (limited to 'gcc/combine.c')
| -rw-r--r-- | gcc/combine.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/gcc/combine.c b/gcc/combine.c index 6ebaadf..55be324 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -7210,7 +7210,6 @@ if_then_else_cond (x, ptrue, pfalse) { enum machine_mode mode = GET_MODE (x); enum rtx_code code = GET_CODE (x); - unsigned int size = GET_MODE_BITSIZE (mode); rtx cond0, cond1, true0, true1, false0, false1; unsigned HOST_WIDE_INT nz; @@ -7361,9 +7360,9 @@ if_then_else_cond (x, ptrue, pfalse) true0 = operand_subword (true0, SUBREG_WORD (x), 0, mode); false0 = operand_subword (false0, SUBREG_WORD (x), 0, mode); } - *ptrue = force_to_mode (true0, mode, GET_MODE_MASK (mode), NULL_RTX, 0); + *ptrue = force_to_mode (true0, mode, ~(HOST_WIDE_INT) 0, NULL_RTX, 0); *pfalse - = force_to_mode (false0, mode, GET_MODE_MASK (mode), NULL_RTX, 0); + = force_to_mode (false0, mode, ~(HOST_WIDE_INT) 0, NULL_RTX, 0); return cond0; } @@ -7376,14 +7375,18 @@ if_then_else_cond (x, ptrue, pfalse) /* If X is known to be either 0 or -1, those are the true and false values when testing X. */ - else if (num_sign_bit_copies (x, mode) == size) + else if (x == constm1_rtx || x == const0_rtx + || (mode != VOIDmode + && num_sign_bit_copies (x, mode) == GET_MODE_BITSIZE (mode))) { *ptrue = constm1_rtx, *pfalse = const0_rtx; return x; } /* Likewise for 0 or a single bit. */ - else if (exact_log2 (nz = nonzero_bits (x, mode)) >= 0) + else if (mode != VOIDmode + && GET_MODE_BITSIZE (mode) <= HOST_BITS_PER_WIDE_INT + && exact_log2 (nz = nonzero_bits (x, mode)) >= 0) { *ptrue = GEN_INT (nz), *pfalse = const0_rtx; return x; |