diff options
Diffstat (limited to 'gcc/varasm.c')
| -rw-r--r-- | gcc/varasm.c | 22 |
1 files changed, 14 insertions, 8 deletions
diff --git a/gcc/varasm.c b/gcc/varasm.c index 800465b..e3b0996 100644 --- a/gcc/varasm.c +++ b/gcc/varasm.c @@ -4530,12 +4530,13 @@ output_constructor (exp, size) and put them into bytes from the most significant end. */ shift = end_offset - next_offset - this_time; /* Don't try to take a bunch of bits that cross - the word boundary in the INTEGER_CST. */ + the word boundary in the INTEGER_CST. We can + only select bits from the LOW or HIGH part + not from both. */ if (shift < HOST_BITS_PER_WIDE_INT && shift + this_time > HOST_BITS_PER_WIDE_INT) { - this_time -= (HOST_BITS_PER_WIDE_INT - shift); - shift = HOST_BITS_PER_WIDE_INT; + this_time = (HOST_BITS_PER_WIDE_INT - shift); } /* Now get the bits from the appropriate constant word. */ @@ -4550,8 +4551,10 @@ output_constructor (exp, size) } else abort (); + /* Get the result. This works only when: + 1 <= this_time <= HOST_BITS_PER_WIDE_INT. */ byte |= (((value >> shift) - & (((HOST_WIDE_INT) 1 << this_time) - 1)) + & (((HOST_WIDE_INT) 2 << (this_time - 1)) - 1)) << (BITS_PER_UNIT - this_time - next_bit)); } else @@ -4563,12 +4566,13 @@ output_constructor (exp, size) shift = (next_offset - TREE_INT_CST_LOW (DECL_FIELD_BITPOS (field))); /* Don't try to take a bunch of bits that cross - the word boundary in the INTEGER_CST. */ + the word boundary in the INTEGER_CST. We can + only select bits from the LOW or HIGH part + not from both. */ if (shift < HOST_BITS_PER_WIDE_INT && shift + this_time > HOST_BITS_PER_WIDE_INT) { - this_time -= (HOST_BITS_PER_WIDE_INT - shift); - shift = HOST_BITS_PER_WIDE_INT; + this_time = (HOST_BITS_PER_WIDE_INT - shift); } /* Now get the bits from the appropriate constant word. */ @@ -4581,8 +4585,10 @@ output_constructor (exp, size) } else abort (); + /* Get the result. This works only when: + 1 <= this_time <= HOST_BITS_PER_WIDE_INT. */ byte |= (((value >> shift) - & (((HOST_WIDE_INT) 1 << this_time) - 1)) + & (((HOST_WIDE_INT) 2 << (this_time - 1)) - 1)) << next_bit); } next_offset += this_time; |