From: Ian Lance Taylor Date: Thu, 11 Sep 2003 04:44:23 +0000 (+0000) Subject: combine.c (force_to_mode): Set fuller_mask based only on mask, not op_mode. X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=50b29dbb90217345d2253a9a5397a513cdf317a5;p=platform%2Fupstream%2Fgcc.git combine.c (force_to_mode): Set fuller_mask based only on mask, not op_mode. * combine.c (force_to_mode): Set fuller_mask based only on mask, not op_mode. From-SVN: r71292 --- diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 3a68a05..f6e1b35 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2003-09-10 Ian Lance Taylor + + * combine.c (force_to_mode): Set fuller_mask based only on mask, + not op_mode. + Thu Sep 11 01:21:05 CEST 2003 Jan Hubicka * c-objc-common.c (c_cannot_inline_tree_fn): Warn diff --git a/gcc/combine.c b/gcc/combine.c index 0853a2c..5f005e4 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -6833,15 +6833,13 @@ force_to_mode (rtx x, enum machine_mode mode, unsigned HOST_WIDE_INT mask, mask &= GET_MODE_MASK (op_mode); /* When we have an arithmetic operation, or a shift whose count we - do not know, we need to assume that all bit the up to the highest-order + do not know, we need to assume that all bits up to the highest-order bit in MASK will be needed. This is how we form such a mask. */ - if (op_mode) - fuller_mask = (GET_MODE_BITSIZE (op_mode) >= HOST_BITS_PER_WIDE_INT - ? GET_MODE_MASK (op_mode) - : (((unsigned HOST_WIDE_INT) 1 << (floor_log2 (mask) + 1)) - - 1)); + if (mask & ((unsigned HOST_WIDE_INT) 1 << (HOST_BITS_PER_WIDE_INT - 1))) + fuller_mask = ~(unsigned HOST_WIDE_INT) 0; else - fuller_mask = ~(HOST_WIDE_INT) 0; + fuller_mask = (((unsigned HOST_WIDE_INT) 1 << (floor_log2 (mask) + 1)) + - 1); /* Determine what bits of X are guaranteed to be (non)zero. */ nonzero = nonzero_bits (x, mode);