[MIPS GlobalISel] Select jump_table and brjt

G_JUMP_TABLE and G_BRJT appear from translation of switch statement.
Select these two instructions for MIPS32, both pic and non-pic.

Differential Revision: https://reviews.llvm.org/D65861

llvm-svn: 368274
diff --git a/llvm/lib/Target/Mips/MipsLegalizerInfo.cpp b/llvm/lib/Target/Mips/MipsLegalizerInfo.cpp
index a62a077..ea7cc09 100644
--- a/llvm/lib/Target/Mips/MipsLegalizerInfo.cpp
+++ b/llvm/lib/Target/Mips/MipsLegalizerInfo.cpp
@@ -63,6 +63,9 @@
       .legalFor({s32})
       .minScalar(0, s32);
 
+  getActionDefinitionsBuilder(G_BRJT)
+      .legalFor({{p0, s32}});
+
   getActionDefinitionsBuilder(G_PHI)
       .legalFor({p0, s32, s64})
       .minScalar(0, s32);
@@ -98,7 +101,7 @@
   getActionDefinitionsBuilder(G_FRAME_INDEX)
       .legalFor({p0});
 
-  getActionDefinitionsBuilder(G_GLOBAL_VALUE)
+  getActionDefinitionsBuilder({G_GLOBAL_VALUE, G_JUMP_TABLE})
       .legalFor({p0});
 
   // FP instructions