[PATCH] D110869: [X86] Implement -fzero-call-used-regs option

[Bill Wendling via Phabricator via cfe-commits]

void added a comment.

In D110869#3295147 <https://reviews.llvm.org/D110869#3295147>, @nathanchance wrote:

> 



> I tested this patch but it did not change the hang.

Okay. We need to determine which function is failing. Could you do something like this:

  #define zcur __attribute__((zero_call_used_regs("used-gpr")))

and then add `zcur` to each function, while compiling the module with `-fzero-call-used-regs=skip`. Then remove the `zcur` attribute from functions until it works? I know it's a PITA, but otherwise I'm just guessing at which function's causing the failure...


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https://reviews.llvm.org/D110869