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Use DILexicalBlockFile, rather than DILexicalBlock, to track discriminator changes to ensure discriminator changes don't introduce new DWARF DW_TAG_lexical_blocks.

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Somewhat unnoticed in the original implementation of discriminators, but
it could cause instructions to end up in new, small,
DW_TAG_lexical_blocks due to the use of DILexicalBlock to track
discriminator changes.

Instead, use DILexicalBlockFile which we already use to track file
changes without introducing new scopes, so it works well to track
discriminator changes in the same way.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216239 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
David Blaikie
2014-08-21 22:45:21 +00:00
parent d1a09c47d2
commit c7260209a8
16 changed files with 47 additions and 52 deletions
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9
include/llvm/IR/DIBuilder.h
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@@ -659,8 +659,9 @@ namespace llvm {
/// lexical block as it crosses a file.
/// @param Scope Lexical block.
/// @param File Source file.
DILexicalBlockFile createLexicalBlockFile(DIDescriptor Scope,
DIFile File);
/// @param Discriminator DWARF path discriminator value.
DILexicalBlockFile createLexicalBlockFile(DIDescriptor Scope, DIFile File,
unsigned Discriminator = 0);
/// createLexicalBlock - This creates a descriptor for a lexical block
/// with the specified parent context.
@@ -668,10 +669,8 @@ namespace llvm {
/// @param File Source file.
/// @param Line Line number.
/// @param Col Column number.
/// @param Discriminator DWARF path discriminator value.
DILexicalBlock createLexicalBlock(DIDescriptor Scope, DIFile File,
unsigned Line, unsigned Col,
unsigned Discriminator);
unsigned Line, unsigned Col);
/// \brief Create a descriptor for an imported module.
/// @param Context The scope this module is imported into