[all-commits] [llvm/llvm-project] 2627f9: [dfsan] Fix Len argument type in call to __dfsan_m...

[Z via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 2627f99613740b8f8a85e150dc0e4c4b6fa6e13f
      https://github.com/llvm/llvm-project/commit/2627f99613740b8f8a85e150dc0e4c4b6fa6e13f
  Author: Elia Geretto <EliaGeretto>
  Date:   2021-04-22 (Thu, 22 Apr 2021)

  Changed paths:
    M llvm/lib/Transforms/Instrumentation/DataFlowSanitizer.cpp

  Log Message:
  -----------
  [dfsan] Fix Len argument type in call to __dfsan_mem_transfer_callback

This patch is supposed to solve: https://bugs.llvm.org/show_bug.cgi?id=50075

The function `__dfsan_mem_transfer_callback` takes a `Len` argument of type `i64`; however, when processing a `MemTransferInst` such as `llvm.memcpy.p0i8.p0i8.i32`, the `len` argument has type `i32`. In order to make the type of `len` compatible with the one of the callback argument, this change zero-extends it when necessary.

Reviewed By: stephan.yichao.zhao, gbalats

Differential Revision: https://reviews.llvm.org/D101048