If the register allocator ran out of registers, just abort for now.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48175 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/RegAllocLinearScan.cpp b/lib/CodeGen/RegAllocLinearScan.cpp
index d43cc19..144f0a7 100644
--- a/lib/CodeGen/RegAllocLinearScan.cpp
+++ b/lib/CodeGen/RegAllocLinearScan.cpp
@@ -685,8 +685,14 @@
}
// All registers must have inf weight. Just grab one!
- if (!minReg)
+ if (!minReg) {
+ if (active_.size() == 0) {
+ // FIXME: All the registers are occupied by fixed intervals.
+ cerr << "Register allocator ran out of registers!\n";
+ abort();
+ }
minReg = *RC->allocation_order_begin(*mf_);
+ }
}
DOUT << "\t\tregister with min weight: "