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Provide an API to temporarily suppress DebugLocations from being attached

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to emitted instructions.  Use this if you want an instruction to be
counted towards the prologue or if there is no useful source location.

rdar://problem/13442648

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180929 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Adrian Prantl 2013-05-02 17:27:49 +00:00
parent f945d09d53
commit f9bccc2f1a
1 changed files with 21 additions and 0 deletions
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21
include/llvm/IR/IRBuilder.h
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@ -49,6 +49,10 @@ protected:
class IRBuilderBase {
DebugLoc CurDbgLocation;
protected:
/// Save the current debug location here while we are suppressing
/// line table entries.
llvm::DebugLoc SavedDbgLocation;
BasicBlock *BB;
BasicBlock::iterator InsertPt;
LLVMContext &Context;
@ -113,6 +117,23 @@ public:
CurDbgLocation = L;
}
/// \brief Temporarily suppress DebugLocations from being attached
/// to emitted instructions, until the next call to
/// SetCurrentDebugLocation() or EnableDebugLocations(). Use this
/// if you want an instruction to be counted towards the prologue or
/// if there is no useful source location.
void DisableDebugLocations() {
llvm::DebugLoc Empty;
SavedDbgLocation = getCurrentDebugLocation();
SetCurrentDebugLocation(Empty);
}
/// \brief Restore the previously saved DebugLocation.
void EnableDebugLocations() {
assert(CurDbgLocation.isUnknown());
SetCurrentDebugLocation(SavedDbgLocation);
}
/// \brief Get location information used by debugging information.
DebugLoc getCurrentDebugLocation() const { return CurDbgLocation; }