diff options
Diffstat (limited to 'gcc/simplify-rtx.cc')
| -rw-r--r-- | gcc/simplify-rtx.cc | 24 |
1 files changed, 23 insertions, 1 deletions
diff --git a/gcc/simplify-rtx.cc b/gcc/simplify-rtx.cc index 5d4939c9206..e152918b0f1 100644 --- a/gcc/simplify-rtx.cc +++ b/gcc/simplify-rtx.cc @@ -5066,6 +5066,15 @@ simplify_const_binary_operation (enum rtx_code code, machine_mode mode, case SS_ASHIFT: case US_ASHIFT: { + /* The shift count might be in SImode while int_mode might + be narrower. On IA-64 it is even DImode. If the shift + count is too large and doesn't fit into int_mode, we'd + ICE. So, if int_mode is narrower than word, use + word_mode for the shift count. */ + if (GET_MODE (op1) == VOIDmode + && GET_MODE_PRECISION (int_mode) < BITS_PER_WORD) + pop1 = rtx_mode_t (op1, word_mode); + wide_int wop1 = pop1; if (SHIFT_COUNT_TRUNCATED) wop1 = wi::umod_trunc (wop1, GET_MODE_PRECISION (int_mode)); @@ -5112,6 +5121,15 @@ simplify_const_binary_operation (enum rtx_code code, machine_mode mode, case ROTATE: case ROTATERT: { + /* The rotate count might be in SImode while int_mode might + be narrower. On IA-64 it is even DImode. If the shift + count is too large and doesn't fit into int_mode, we'd + ICE. So, if int_mode is narrower than word, use + word_mode for the shift count. */ + if (GET_MODE (op1) == VOIDmode + && GET_MODE_PRECISION (int_mode) < BITS_PER_WORD) + pop1 = rtx_mode_t (op1, word_mode); + if (wi::neg_p (pop1)) return NULL_RTX; @@ -5208,7 +5226,11 @@ simplify_const_binary_operation (enum rtx_code code, machine_mode mode, case ASHIFT: if (CONST_SCALAR_INT_P (op1)) { - wide_int shift = rtx_mode_t (op1, mode); + wide_int shift + = rtx_mode_t (op1, + GET_MODE (op1) == VOIDmode + && GET_MODE_PRECISION (int_mode) < BITS_PER_WORD + ? word_mode : mode); if (SHIFT_COUNT_TRUNCATED) shift = wi::umod_trunc (shift, GET_MODE_PRECISION (int_mode)); else if (wi::geu_p (shift, GET_MODE_PRECISION (int_mode))) |