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Add compiler support for LLVM's x86_64 ERMSB feature #78396

Merged
merged 1 commit into from
Oct 27, 2020
Merged

Add compiler support for LLVM's x86_64 ERMSB feature #78396

merged 1 commit into from
Oct 27, 2020

Commits on Oct 26, 2020

  1. Add compiler support for LLVM's x86 ERMSB feature 

    This change is needed for compiler-builtins to check for this feature
when implementing memcpy/memset. See:
  rust-lang/compiler-builtins#365

The change just does compile-time detection. I think that runtime
detection will have to come in a follow-up CL to std-detect.

Like all the CPU feature flags, this just references rust-lang#44839

Signed-off-by: Joe Richey <[email protected]>
    @josephlr
    josephlr committed Oct 26, 2020
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