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rustc_codegen_llvm: Restore the closure env alloca hack for LLVM 5. #53239

Merged
merged 1 commit into from
Aug 14, 2018
Merged

rustc_codegen_llvm: Restore the closure env alloca hack for LLVM 5. #53239

merged 1 commit into from
Aug 14, 2018

Commits on Aug 9, 2018

  1. rustc_codegen_llvm: Restore the closure env alloca hack for LLVM 5. 

    This hack was removed in rust-lang#50949, but without it I found that building
`std` with full debuginfo would print many LLVM `DW_OP_LLVM_fragment`
errors, then die `LLVM ERROR: Failed to strip malformed debug info`.

It doesn't seem to be a problem for LLVM 6, so we can re-enable the hack
just for older LLVM.

This reverts commit da579ef.
Fixes rust-lang#53204.
r? @eddyb
    @cuviper
    cuviper committed Aug 9, 2018
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