Static relocation model Thumb jump table interworking.

Make sure the low bit of the PC is set when loading an address directly
for jump tables in static relocation model.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138912 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 5 insertions, 0 deletions

diff --git a/lib/Target/ARM/ARMAsmPrinter.cpp b/lib/Target/ARM/ARMAsmPrinter.cpp
index ce238a1beb..13d2ad504e 100644
--- a/lib/Target/ARM/ARMAsmPrinter.cpp
+++ b/lib/Target/ARM/ARMAsmPrinter.cpp
@@ -923,6 +923,11 @@ void ARMAsmPrinter::EmitJumpTable(const MachineInstr *MI) {
       Expr = MCBinaryExpr::CreateSub(Expr, MCSymbolRefExpr::Create(JTISymbol,
                                                                    OutContext),
                                      OutContext);
+    // If we're generating a table of Thumb addresses in static relocation
+    // model, we need to add one to keep interworking correctly.
+    else if (AFI->isThumbFunction())
+      Expr = MCBinaryExpr::CreateAdd(Expr, MCConstantExpr::Create(1,OutContext),
+                                     OutContext);
     OutStreamer.EmitValue(Expr, 4);
   }
 }