[PATCH] D50244: [libunwind][mips] Guard accumulator registers

[Stefan Maksimovic via Phabricator via llvm-commits]

smaksimovic created this revision.
smaksimovic added a reviewer: atanasyan.
Herald added subscribers: chrib, arichardson, sdardis.

Mipsr6 does not possess HI and LO accumulator registers, adjust validRegister functions to respect that.


https://reviews.llvm.org/D50244

Files:
  src/Registers.hpp


Index: src/Registers.hpp
===================================================================
--- src/Registers.hpp
+++ src/Registers.hpp
@@ -2759,10 +2759,12 @@
     return false;
   if (regNum <= UNW_MIPS_R31)
     return true;
+#if __mips_isa_rev != 6
   if (regNum == UNW_MIPS_HI)
     return true;
   if (regNum == UNW_MIPS_LO)
     return true;
+#endif
 #if defined(__mips_hard_float) && __mips_fpr == 32
   if (regNum >= UNW_MIPS_F0 && regNum <= UNW_MIPS_F31)
     return true;
@@ -3073,10 +3075,12 @@
     return false;
   if (regNum <= UNW_MIPS_R31)
     return true;
+#if __mips_isa_rev != 6
   if (regNum == UNW_MIPS_HI)
     return true;
   if (regNum == UNW_MIPS_LO)
     return true;
+#endif
   // FIXME: Hard float, DSP accumulator registers, MSA registers
   return false;
 }


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