Major changes to Thumb (not Thumb2). Many 16-bit instructions either modifies CPSR when they are outside the IT blocks, or they can predicated when in Thumb2. Move the implicit def of CPSR to an optional def which defaults CPSR. This allows the 's' bit to be toggled dynamically.
A side-effect of this change is asm printer is now using unified assembly. There are some minor clean ups and fixes as well.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75359 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/AsmPrinter/ARMAsmPrinter.cpp b/lib/Target/ARM/AsmPrinter/ARMAsmPrinter.cpp
index 3b1c491..0a55c0c 100644
--- a/lib/Target/ARM/AsmPrinter/ARMAsmPrinter.cpp
+++ b/lib/Target/ARM/AsmPrinter/ARMAsmPrinter.cpp
@@ -974,8 +974,8 @@
bool Result = AsmPrinter::doInitialization(M);
DW = getAnalysisIfAvailable<DwarfWriter>();
- // Thumb-2 instructions are supported only in unified assembler syntax mode.
- if (Subtarget->hasThumb2())
+ // Use unified assembler syntax mode for Thumb.
+ if (Subtarget->isThumb())
O << "\t.syntax unified\n";
// Emit ARM Build Attributes