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Loop collapsing with fusion #2618

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Loop collapsing with fusion #2618

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This PR handles loop collapsing in op fusion. There are two parts:

  1. Decide which loops to be collapsed. When ops are fused, all its operands should be checked whether its dimensions are involved in broadcasting. Such information will be used to decide which loops should be collapsed.
  2. Code generation when some loops are collapsed.

@chentong319
decide collapse
4714906 
Signed-off-by: chentong319 <chentong@us.ibm.com>
@chentong319
output
96efa12 
Signed-off-by: chentong319 <chentong@us.ibm.com>
@chentong319 chentong319 marked this pull request as draft November 13, 2023 22:14
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