This patch adds basic debug info support with basic block sections.

This patch uses ranges for debug information when a function contains basic block sections rather than using [lowpc, highpc]. This is also the first in a series of patches for debug info and does not contain the support for linker relaxation. That will be done as a follow up patch.

Differential Revision: https://reviews.llvm.org/D78851

1 files changed, 14 insertions, 0 deletions

diff --git a/llvm/lib/CodeGen/AsmPrinter/DebugHandlerBase.cpp b/llvm/lib/CodeGen/AsmPrinter/DebugHandlerBase.cpp
index 9f0781d..880791a 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DebugHandlerBase.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/DebugHandlerBase.cpp
@@ -327,3 +327,17 @@ void DebugHandlerBase::endFunction(const MachineFunction *MF) {
   LabelsBeforeInsn.clear();
   LabelsAfterInsn.clear();
 }
+
+void DebugHandlerBase::beginBasicBlock(const MachineBasicBlock &MBB) {
+  if (!MBB.isBeginSection())
+    return;
+
+  PrevLabel = MBB.getSymbol();
+}
+
+void DebugHandlerBase::endBasicBlock(const MachineBasicBlock &MBB) {
+  if (!MBB.isEndSection())
+    return;
+
+  PrevLabel = nullptr;
+}