Merging r344591:

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r344591 | abeserminji | 2018-10-16 01:27:28 -0700 (Tue, 16 Oct 2018) | 11 lines

[mips][micromips] Fix how values in .gcc_except_table are calculated

When a landing pad is calculated in a program that is compiled
for micromips, it will point to an even address. Such an error will
cause a segmentation fault, as the instructions in micromips are
aligned on odd addresses. This patch sets the last bit of the offset
where a landing pad is, to 1, which will effectively be
an odd address and point to the instruction exactly.

Differential Revision: https://reviews.llvm.org/D52985

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llvm-svn: 347028

1 files changed, 5 insertions, 0 deletions

diff --git a/llvm/include/llvm/MC/MCAsmBackend.h b/llvm/include/llvm/MC/MCAsmBackend.h
index 030d3c05aa5..07835c21fce 100644
--- a/llvm/include/llvm/MC/MCAsmBackend.h
+++ b/llvm/include/llvm/MC/MCAsmBackend.h
@@ -165,6 +165,11 @@ public:
     return 0;
   }
 
+  /// Check whether a given symbol has been flagged with MICROMIPS flag.
+  virtual bool isMicroMips(const MCSymbol *Sym) const {
+    return false;
+  }
+
   /// Handles all target related code padding when starting to write a new
   /// basic block to an object file.
   ///