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-rw-r--r--llvm/lib/MCA/HardwareUnits/ResourceManager.cpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/llvm/lib/MCA/HardwareUnits/ResourceManager.cpp b/llvm/lib/MCA/HardwareUnits/ResourceManager.cpp
index b68e996ff9e..e3a0da2dafe 100644
--- a/llvm/lib/MCA/HardwareUnits/ResourceManager.cpp
+++ b/llvm/lib/MCA/HardwareUnits/ResourceManager.cpp
@@ -169,6 +169,7 @@ unsigned ResourceManager::getNumUnits(uint64_t ResourceID) const {
// Second, is the specific sub-resource ID.
ResourceRef ResourceManager::selectPipe(uint64_t ResourceID) {
unsigned Index = getResourceStateIndex(ResourceID);
+ assert(Index < Resources.size() && "Invalid resource use!");
ResourceState &RS = *Resources[Index];
assert(RS.isReady() && "No available units to select!");
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