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Don't emit .debug_line header data if there aren't any lines to put in it,

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such as will happen when .loc directives are used.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42277 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2007-09-24 21:43:52 +00:00
parent 44de9267c3
commit 81a148bd56
1 changed files with 5 additions and 0 deletions
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5
lib/CodeGen/DwarfWriter.cpp
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@ -2196,6 +2196,11 @@ private:
/// EmitDebugLines - Emit source line information.
///
void EmitDebugLines() {
// If there are no lines to emit (such as when we're using .loc directives
// to emit .debug_line information) don't emit a .debug_line header.
if (SectionSourceLines.empty())
return;
// Minimum line delta, thus ranging from -10..(255-10).
const int MinLineDelta = -(DW_LNS_fixed_advance_pc + 1);
// Maximum line delta, thus ranging from -10..(255-10).