DebugInfo: Use base address specifiers more aggressively
Using a base address specifier even for a single-element range is a size
win for object files (7 words versus 8 words - more significant savings
if the debug info is compressed (since it's 3 words of uncompressable
reloc + 4 compressable words compared to 6 uncompressable reloc + 2
compressable words) - does trade off executable size increase though.
llvm-svn: 344841
diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index 3d842e7..2f14f54 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -2163,7 +2163,7 @@
// or optnone where there may be holes in a single CU's section
// contributions.
auto *Base = CUBase;
- if (!Base && P.second.size() > 1 &&
+ if (!Base && (P.second.size() > 1 || DwarfVersion < 5) &&
(UseDwarfRangesBaseAddressSpecifier || DwarfVersion >= 5)) {
BaseIsSet = true;
// FIXME/use care: This may not be a useful base address if it's not