[Analysis] Fix a warning (NFC)

This patch fixes:

third-party/unittest/googletest/include/gtest/gtest.h:1379:11:
error: comparison of integers of different signs: 'const unsigned
int' and 'con

[Analysis] Fix a warning (NFC)

This patch fixes:

third-party/unittest/googletest/include/gtest/gtest.h:1379:11:
error: comparison of integers of different signs: 'const unsigned
int' and 'const int' [-Werror,-Wsign-compare]

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[Analysis] Avoid running transform passes that have just been run (#112092)

This patch adds a new analysis pass to track a set of passes and their
parameters to see if we can avoid running transfor

[Analysis] Avoid running transform passes that have just been run (#112092)

This patch adds a new analysis pass to track a set of passes and their
parameters to see if we can avoid running transform passes that have
just been run. The current implementation only skips redundant
InstCombine runs. I will add support for other passes in follow-up
patches.

RFC link:
https://discourse.llvm.org/t/rfc-pipeline-avoid-running-transform-passes-that-have-just-been-run/82467

Compile time improvement:
http://llvm-compile-time-tracker.com/compare.php?from=76007138f4ffd4e0f510d12b5e8cad529c21f24d&to=64134cf07ea7eb39c60320087c0c5afdc16c3a2b&stat=instructions%3Au

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