[InstCombine][asan] Don't speculate loads before `select ptr` (#100773)

Even if memory is valid from `llvm` point of view,
e.g. local alloca, sanitizers have API for user
specific memory annotations.

These annotations can be used to track size of the
local object, e.g. inline vectors may prevent
accesses beyond the current vector size.

So valid programs should not access those parts of
alloca before checking preconditions.

Fixes #100639.

0 files changed, 0 insertions, 0 deletions