[GlobalOpt] Add TTI interface useFastCCForInternalCall for FASTCC#164768

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phoebewang wants to merge 7 commits intollvm:mainfrom

phoebewang:fastcc

Commits on Oct 25, 2025

Move caller check logic to target code
phoebewang
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Commits on Oct 31, 2025

Document changes to fastcc
phoebewang
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Commits on Nov 6, 2025

Merge remote-tracking branch 'origin/main' into fastcc
phoebewang
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