[PATCH] D139177: [LoongArch] Specify registers used for exception handling

[Lu Weining via Phabricator via cfe-commits]

SixWeining created this revision.
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See definition in backend D134709 <https://reviews.llvm.org/D134709> and the doc [1] for more detail.

With the benefit of this change, most libcxx and libcxxabi tests pass.

[1]: https://llvm.org/docs/ExceptionHandling.html


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D139177

Files:
  clang/lib/Basic/Targets/LoongArch.h


Index: clang/lib/Basic/Targets/LoongArch.h
===================================================================
--- clang/lib/Basic/Targets/LoongArch.h
+++ clang/lib/Basic/Targets/LoongArch.h
@@ -56,6 +56,14 @@
 
   ArrayRef<const char *> getGCCRegNames() const override;
 
+  int getEHDataRegisterNumber(unsigned RegNo) const override {
+    if (RegNo == 0)
+      return 4;
+    if (RegNo == 1)
+      return 5;
+    return -1;
+  }
+
   ArrayRef<TargetInfo::GCCRegAlias> getGCCRegAliases() const override;
 
   bool validateAsmConstraint(const char *&Name,


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