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* Revert "ARM-Darwin: keep the frame register reserved even if not updated."Alina Sbirlea2019-12-061-15/+0
| | | | | | | | This reverts commit a7d90af1be48234ce583e00fb16e33633d44ae38. This revision came back as the root-cause for crashes in internal ARM-IOS apps. Reproducer in https://bugs.llvm.org/show_bug.cgi?id=44231.
* ARM-Darwin: keep the frame register reserved even if not updated.Tim Northover2019-10-041-0/+15
Darwin platforms need the frame register to always point at a valid record even if it's not updated in a leaf function. Backtraces are more important than one extra GPR. llvm-svn: 373738
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