[PATCH] D157500: [Thumb1] Use callee-saved register to adjust stack pointer

[Oliver Stannard via Phabricator via llvm-commits]

olista01 added a comment.

Do you have a test case for the situation where `r4` is not saved?



================
Comment at: llvm/lib/Target/ARM/Thumb1FrameLowering.cpp:552
+    }
+
     if (AFI->shouldRestoreSPFromFP()) {
----------------
Please add an assertion to check that `ScratchRegister` has been set to something.


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  https://reviews.llvm.org/D157500/new/

https://reviews.llvm.org/D157500