When patching inlineasm nodes to use GPRPair for 64-bit values, we
were dropping the information that two operands were tied, which
effectively broke the live-interval of vregs affected.
llvm-svn: 188643
if(PairedReg.getNode()) {
OpChanged[OpChanged.size() -1 ] = true;
Flag = InlineAsm::getFlagWord(Kind, 1 /* RegNum*/);
- Flag = InlineAsm::getFlagWordForRegClass(Flag, ARM::GPRPairRegClassID);
+ if (IsTiedToChangedOp)
+ Flag = InlineAsm::getFlagWordForMatchingOp(Flag, DefIdx);
+ else
+ Flag = InlineAsm::getFlagWordForRegClass(Flag, ARM::GPRPairRegClassID);
// Replace the current flag.
AsmNodeOperands[AsmNodeOperands.size() -1] = CurDAG->getTargetConstant(
Flag, MVT::i32);
tail call void asm sideeffect "strd $0, ${0:H}, [$1]", "r,r"(i64 %4, i64* %p) nounwind
ret void
}
+
+; Make sure we don't untie operands by mistake.
+define i64 @tied_64bit_test(i64 %in) nounwind {
+; CHECK-LABEL: tied_64bit_test:
+; CHECK: OUT([[OUTREG:r[0-9]+]]), IN([[OUTREG]])
+ %addr = alloca i64
+ call void asm "OUT($0), IN($1)", "=*rm,0"(i64* %addr, i64 %in)
+ ret i64 %in
+}