diff --git a/llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp b/llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp
--- a/llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp
+++ b/llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp
@@ -1615,6 +1615,20 @@
       }
     }
 
+    if ((IID == Intrinsic::umin || IID == Intrinsic::smax) &&
+	    (II->getType()->isIntOrIntVectorTy(1))) {
+      // umin(i1 X, i1 Y) -> and i1 X, Y
+      // smax(i1 X, i1 Y) -> and i1 X, Y
+      return BinaryOperator::CreateAnd(I0, I1);
+    }
+
+    if ((IID == Intrinsic::umax || IID == Intrinsic::smin) &&
+	    (II->getType()->isIntOrIntVectorTy(1))) {
+      // umax(i1 X, i1 Y) -> or i1 X, Y
+      // smin(i1 X, i1 Y) -> or i1 X, Y
+      return BinaryOperator::CreateOr(I0, I1);
+    }
+
     if (IID == Intrinsic::smax || IID == Intrinsic::smin) {
       // smax (neg nsw X), (neg nsw Y) --> neg nsw (smin X, Y)
       // smin (neg nsw X), (neg nsw Y) --> neg nsw (smax X, Y)
diff --git a/llvm/test/Transforms/InstCombine/fold-minmax-i1.ll b/llvm/test/Transforms/InstCombine/fold-minmax-i1.ll
new file mode 100644
--- /dev/null
+++ b/llvm/test/Transforms/InstCombine/fold-minmax-i1.ll
@@ -0,0 +1,34 @@
+; RUN: opt < %s -passes=instcombine -S | FileCheck %s
+
+define i1 @umin(i1 %0, i1 %1) {
+; CHECK-LABEL: @umin
+; CHECK-NEXT: and i1
+  %3 = call i1 @llvm.umin.i1(i1 %0, i1 %1)
+  ret i1 %3
+}
+
+define i1 @smin(i1 %0, i1 %1) {
+; CHECK-LABEL: @smin
+; CHECK-NEXT: or i1
+  %3 = call i1 @llvm.smin.i1(i1 %0, i1 %1)
+  ret i1 %3
+}
+
+define i1 @umax(i1 %0, i1 %1) {
+; CHECK-LABEL: @umax
+; CHECK-NEXT: or i1
+  %3 = call i1 @llvm.umax.i1(i1 %0, i1 %1)
+  ret i1 %3
+}
+
+define i1 @smax(i1 %0, i1 %1) {
+; CHECK-LABEL: @smax
+; CHECK-NEXT: and i1
+  %3 = call i1 @llvm.smax.i1(i1 %0, i1 %1)
+  ret i1 %3
+}
+
+declare i1 @llvm.umin.i1(i1, i1)
+declare i1 @llvm.smin.i1(i1, i1)
+declare i1 @llvm.umax.i1(i1, i1)
+declare i1 @llvm.smax.i1(i1, i1)