Handle mixed normal and early-clobber defs on inline asm.
PR14376.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168320 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/LiveInterval.cpp b/lib/CodeGen/LiveInterval.cpp
index c3bf2d2..8585cbb 100644
--- a/lib/CodeGen/LiveInterval.cpp
+++ b/lib/CodeGen/LiveInterval.cpp
@@ -59,8 +59,16 @@
return VNI;
}
if (SlotIndex::isSameInstr(Def, I->start)) {
- assert(I->start == Def && "Cannot insert def, already live");
- assert(I->valno->def == Def && "Inconsistent existing value def");
+ assert(I->valno->def == I->start && "Inconsistent existing value def");
+
+ // It is possible to have both normal and early-clobber defs of the same
+ // register on an instruction. It doesn't make a lot of sense, but it is
+ // possible to specify in inline assembly.
+ //
+ // Just convert everything to early-clobber.
+ Def = std::min(Def, I->start);
+ if (Def != I->start)
+ I->start = I->valno->def = Def;
return I->valno;
}
assert(SlotIndex::isEarlierInstr(Def, I->start) && "Already live at def");