diff options
Diffstat (limited to 'gcc/tree.c')
| -rw-r--r-- | gcc/tree.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/gcc/tree.c b/gcc/tree.c index 21e681c4ae2..48efe09ccdd 100644 --- a/gcc/tree.c +++ b/gcc/tree.c @@ -518,7 +518,7 @@ tree build_int_cst_type (tree type, HOST_WIDE_INT low) { unsigned HOST_WIDE_INT val = (unsigned HOST_WIDE_INT) low; - unsigned HOST_WIDE_INT hi; + unsigned HOST_WIDE_INT hi, mask; unsigned bits; bool signed_p; bool negative; @@ -538,10 +538,12 @@ build_int_cst_type (tree type, HOST_WIDE_INT low) negative = ((val >> (bits - 1)) & 1) != 0; /* Mask out the bits outside of the precision of the constant. */ + mask = (((unsigned HOST_WIDE_INT) 2) << (bits - 1)) - 1; + if (signed_p && negative) - val = val | ((~(unsigned HOST_WIDE_INT) 0) << bits); + val |= ~mask; else - val = val & ~((~(unsigned HOST_WIDE_INT) 0) << bits); + val &= mask; } /* Determine the high bits. */ @@ -556,7 +558,8 @@ build_int_cst_type (tree type, HOST_WIDE_INT low) else { bits -= HOST_BITS_PER_WIDE_INT; - hi = hi & ~((~(unsigned HOST_WIDE_INT) 0) << bits); + mask = (((unsigned HOST_WIDE_INT) 2) << (bits - 1)) - 1; + hi &= mask; } } |