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LLVM backend: Compute size_t instead of hardcoded 64-bit #1959

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bollu opened this issue Dec 16, 2022 · 0 comments
Open

LLVM backend: Compute size_t instead of hardcoded 64-bit #1959

bollu opened this issue Dec 16, 2022 · 0 comments
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LLVM MVP

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@bollu
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bollu commented Dec 16, 2022

The LLVM backend (#1837) currently assumes that size_t is 64bit. I believe the correct way to do this is to:

  1. Create a notion of target architecture in Lean (to support cross compilation)
  2. Load the information about the target architecture, using LLVMCreateTargetData
  3. Use LLVMPointerSize to get the number of bytes. We should then use the corresponding i(<number_of_bytes>*8) type instead of assuming i64 everywhere.
@Kha Kha added this to the LLVM MVP milestone Dec 16, 2022
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