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SampleProfile: Check for missing debug locations

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Don't use `DebugLoc` accessors if we're pointing at null, which will be
a problem after a WIP patch to make the `DIDescriptor` accessors more
strict.  Caught by Frontend/profile-sample-use-loc-tracking.c (in
clang).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@232792 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Duncan P. N. Exon Smith 2015-03-20 00:56:55 +00:00
parent e48bd555a0
commit 67934e4b41
1 changed files with 3 additions and 0 deletions
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3
lib/Transforms/Scalar/SampleProfile.cpp
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@ -217,6 +217,9 @@ void SampleProfileLoader::printBlockWeight(raw_ostream &OS, BasicBlock *BB) {
/// \returns The profiled weight of I.
unsigned SampleProfileLoader::getInstWeight(Instruction &Inst) {
DebugLoc DLoc = Inst.getDebugLoc();
if (DLoc.isUnknown())
return 0;
unsigned Lineno = DLoc.getLine();
if (Lineno < HeaderLineno)
return 0;