tree 4068b15625ea72fbb21cdf1e7961f3555ebab2e1
parent c26db586a06204a9e6f9912f41fce62a559a0196
author Slava Zakharin <szakharin@nvidia.com> 1746026706 -0700
committer GitHub <noreply@github.com> 1746026706 -0700
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[flang-rt] Simplify INDEX with len-1 SUBSTRING. (#137889)

The len-1 case is noticeably slower than gfortran's straightforward
implementation
https://github.com/gcc-mirror/gcc/blob/075611b646e5554ae02b2622061ea1614bf16ead/libgfortran/intrinsics/string_intrinsics_inc.c#L253
This change speeds up a simple microkernel by 37% on icelake.