[DEBUG_INFO, NVPTX] Do not emit .debug_loc section.

Summary:
.debug_loc section is not supported for NVPTX target. If there is an
object whose location can change during its lifetime, we do not generate
debug location info for this variable.

Reviewers: echristo

Subscribers: jholewinski, JDevlieghere, llvm-commits

Differential Revision: https://reviews.llvm.org/D48730

llvm-svn: 335976

1 files changed, 5 insertions, 0 deletions

diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index c7688141803..a33bda34630 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -317,6 +317,8 @@ DwarfDebug::DwarfDebug(AsmPrinter *A, Module *M)
   else
     UseInlineStrings = DwarfInlinedStrings == Enable;
 
+  UseLocSection = !TT.isNVPTX();
+
   HasAppleExtensionAttributes = tuneForLLDB();
 
   // Handle split DWARF.
@@ -1196,6 +1198,9 @@ void DwarfDebug::collectVariableInfo(DwarfCompileUnit &TheCU,
       RegVar->initializeDbgValue(MInsn);
       continue;
     }
+    // Do not emit location lists if .debug_loc secton is disabled.
+    if (!useLocSection())
+      continue;
 
     // Handle multiple DBG_VALUE instructions describing one variable.
     DebugLocStream::ListBuilder List(DebugLocs, TheCU, *Asm, *RegVar, *MInsn);