jeanPerier 1f5b6ae89f [flang] optionally add lifetime markers to alloca created in stack-arrays (#140901) ...

Flang at Ofast usually produces executables that consume more stack that
other Fortran compilers.
This is in part because the alloca created from temporary heap
allocation by the StackArray pass are created at the function scope
level without lifetimes, and LLVM does not/is not able to merge alloca
that do not have overlapping lifetimes.

This patch adds an option to generate LLVM lifetime in the StackArray
pass at the previous heap allocation/free using the LLVM dialect
operation for it.

2025-05-22 09:26:14 +02:00

32 KiB

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