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5 do not support them. One purpose of this document is therefore to
8 second purpose of this document, namely to help you to avoid breaking
21 can cause other CPUs to see this load as having happened before the load
45 by a store, and this compiler-generated load would not be ordered by
73 Unfortunately, current compilers will transform this as follows at high
91 have been applied. Therefore, if you need ordering in this example,
141 Given this transformation, the CPU is not required to respect the ordering
143 tempting to add a barrier(), but this does not help. The conditional
145 to relying on control dependencies to produce this ordering, you should
160 values were identical, the compiler could pull this store outside of the
164 evaluation. Consider this example:
171 always true, the compiler can transform this example as follows, again
196 the writes to "b" with the condition. Unfortunately for this line
198 conditional-move instructions, as in this fanciful pseudo-assembly
236 between the prior load and the subsequent store, and this