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-rw-r--r--lib/Target/TargetData.cpp3
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/Target/TargetData.cpp b/lib/Target/TargetData.cpp
index ed9d84661d..41bc78a992 100644
--- a/lib/Target/TargetData.cpp
+++ b/lib/Target/TargetData.cpp
@@ -245,7 +245,8 @@ TargetData::setAlignment(AlignTypeEnum align_type, unsigned char abi_align,
std::pair<align_iterator, align_iterator> ins_result =
std::equal_range(Alignments.begin(), Alignments.end(), elt);
align_iterator I = ins_result.first;
- if (I->AlignType == align_type && I->TypeBitWidth == bit_width) {
+ if (I != Alignments.end() && I->AlignType == align_type &&
+ I->TypeBitWidth == bit_width) {
// Update the abi, preferred alignments.
I->ABIAlign = abi_align;
I->PrefAlign = pref_align;