On Thu, Jan 24, 2013 at 4:36 AM, Xi Wang xi.w...@gmail.com wrote:
icc optimizes away the overflow check x + y x (y 0), because
signed integer overflow is undefined behavior in C. Instead, use
a safe precondition test x INT_MAX - y.
As you post these patches, please add them to:
icc optimizes away the overflow check x + y x (y 0), because
signed integer overflow is undefined behavior in C. Instead, use
a safe precondition test x INT_MAX - y.
---
src/backend/utils/adt/varbit.c |7 +--
src/backend/utils/adt/varlena.c | 10 ++
On Thu, Jan 24, 2013 at 6:36 AM, Xi Wang xi.w...@gmail.com wrote:
icc optimizes away the overflow check x + y x (y 0), because
signed integer overflow is undefined behavior in C. Instead, use
a safe precondition test x INT_MAX - y.
I should mention gcc 4.7 does the same, and it emits a
