Fix broken type legalization of min/max

This was using an anyext when promoting the type
when zext/sext is required.

llvm-svn: 256074

2 files changed, 20 insertions, 2 deletions

diff --git a/llvm/lib/CodeGen/SelectionDAG/LegalizeIntegerTypes.cpp b/llvm/lib/CodeGen/SelectionDAG/LegalizeIntegerTypes.cpp
index 63c9cc52871..3131ca10145 100644
--- a/llvm/lib/CodeGen/SelectionDAG/LegalizeIntegerTypes.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/LegalizeIntegerTypes.cpp
@@ -76,9 +76,10 @@ void DAGTypeLegalizer::PromoteIntegerResult(SDNode *N, unsigned ResNo) {
   case ISD::SELECT_CC:   Res = PromoteIntRes_SELECT_CC(N); break;
   case ISD::SETCC:       Res = PromoteIntRes_SETCC(N); break;
   case ISD::SMIN:
-  case ISD::SMAX:
+  case ISD::SMAX:        Res = PromoteIntRes_SExtOrZExtIntBinOp(N, true); break;
   case ISD::UMIN:
-  case ISD::UMAX:        Res = PromoteIntRes_SimpleIntBinOp(N); break;
+  case ISD::UMAX:        Res = PromoteIntRes_SExtOrZExtIntBinOp(N, false); break;
+
   case ISD::SHL:         Res = PromoteIntRes_SHL(N); break;
   case ISD::SIGN_EXTEND_INREG:
                          Res = PromoteIntRes_SIGN_EXTEND_INREG(N); break;
@@ -660,6 +661,22 @@ SDValue DAGTypeLegalizer::PromoteIntRes_SimpleIntBinOp(SDNode *N) {
                      LHS.getValueType(), LHS, RHS);
 }
 
+SDValue DAGTypeLegalizer::PromoteIntRes_SExtOrZExtIntBinOp(SDNode *N,
+                                                           bool Signed) {
+  SDValue LHS, RHS;
+
+  if (Signed) {
+    LHS = SExtPromotedInteger(N->getOperand(0));
+    RHS = SExtPromotedInteger(N->getOperand(1));
+  } else {
+    LHS = ZExtPromotedInteger(N->getOperand(0));
+    RHS = ZExtPromotedInteger(N->getOperand(1));
+  }
+
+  return DAG.getNode(N->getOpcode(), SDLoc(N),
+                     LHS.getValueType(), LHS, RHS);
+}
+
 SDValue DAGTypeLegalizer::PromoteIntRes_SRA(SDNode *N) {
   SDValue LHS = N->getOperand(0);
   SDValue RHS = N->getOperand(1);
diff --git a/llvm/lib/CodeGen/SelectionDAG/LegalizeTypes.h b/llvm/lib/CodeGen/SelectionDAG/LegalizeTypes.h
index 267a1145a0a..e121e3bc6fa 100644
--- a/llvm/lib/CodeGen/SelectionDAG/LegalizeTypes.h
+++ b/llvm/lib/CodeGen/SelectionDAG/LegalizeTypes.h
@@ -276,6 +276,7 @@ private:
   SDValue PromoteIntRes_SETCC(SDNode *N);
   SDValue PromoteIntRes_SHL(SDNode *N);
   SDValue PromoteIntRes_SimpleIntBinOp(SDNode *N);
+  SDValue PromoteIntRes_SExtOrZExtIntBinOp(SDNode *N, bool Signed);
   SDValue PromoteIntRes_SIGN_EXTEND_INREG(SDNode *N);
   SDValue PromoteIntRes_SRA(SDNode *N);
   SDValue PromoteIntRes_SRL(SDNode *N);