Lower multiply with overflow checking to __mulo<mode>
calls if we haven't been able to lower them any
other way.
Fixes rdar://9090077 and rdar://9210061
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133288 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/TargetLowering.cpp b/lib/CodeGen/SelectionDAG/TargetLowering.cpp
index efbfaa4..474dd7a 100644
--- a/lib/CodeGen/SelectionDAG/TargetLowering.cpp
+++ b/lib/CodeGen/SelectionDAG/TargetLowering.cpp
@@ -81,6 +81,9 @@
Names[RTLIB::MUL_I32] = "__mulsi3";
Names[RTLIB::MUL_I64] = "__muldi3";
Names[RTLIB::MUL_I128] = "__multi3";
+ Names[RTLIB::MULO_I32] = "__mulosi4";
+ Names[RTLIB::MULO_I64] = "__mulodi4";
+ Names[RTLIB::MULO_I128] = "__muloti4";
Names[RTLIB::SDIV_I8] = "__divqi3";
Names[RTLIB::SDIV_I16] = "__divhi3";
Names[RTLIB::SDIV_I32] = "__divsi3";
@@ -1914,7 +1917,7 @@
// comparisons.
if (isa<ConstantSDNode>(N0.getNode()))
return DAG.getSetCC(dl, VT, N1, N0, ISD::getSetCCSwappedOperands(Cond));
-
+
if (ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(N1.getNode())) {
const APInt &C1 = N1C->getAPIntValue();
@@ -2673,9 +2676,9 @@
std::string &Constraint,
std::vector<SDValue> &Ops,
SelectionDAG &DAG) const {
-
+
if (Constraint.length() > 1) return;
-
+
char ConstraintLetter = Constraint[0];
switch (ConstraintLetter) {
default: break;
@@ -2865,7 +2868,7 @@
report_fatal_error("Indirect operand for inline asm not a pointer!");
OpTy = PtrTy->getElementType();
}
-
+
// Look for vector wrapped in a struct. e.g. { <16 x i8> }.
if (const StructType *STy = dyn_cast<StructType>(OpTy))
if (STy->getNumElements() == 1)