--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/Transforms/InstCombine/min-positive.ll	Fri Nov 25 19:14:25 2016 +0900
@@ -0,0 +1,89 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt -S -instcombine < %s | FileCheck %s
+
+@g = external global i32
+
+define i1 @smin(i32 %other) {
+; CHECK-LABEL: @smin(
+; CHECK-NEXT:    [[TEST:%.*]] = icmp sgt i32 %other, 0
+; CHECK-NEXT:    ret i1 [[TEST]]
+;
+  %positive = load i32, i32* @g, !range !{i32 1, i32 2048}
+  %cmp = icmp slt i32 %positive, %other
+  %sel = select i1 %cmp, i32 %positive, i32 %other
+  %test = icmp sgt i32 %sel, 0
+  ret i1 %test
+}
+
+; Range metadata doesn't work for vectors, so find another way to trigger isKnownPositive().
+
+define <2 x i1> @smin_vec(<2 x i32> %x, <2 x i32> %other) {
+; CHECK-LABEL: @smin_vec(
+; CHECK-NEXT:    [[TEST:%.*]] = icmp sgt <2 x i32> %other, zeroinitializer
+; CHECK-NEXT:    ret <2 x i1> [[TEST]]
+;
+  %notneg = and <2 x i32> %x, <i32 7, i32 7>
+  %positive = or <2 x i32> %notneg, <i32 1, i32 1>
+  %cmp = icmp slt <2 x i32> %positive, %other
+  %sel = select <2 x i1> %cmp, <2 x i32> %positive, <2 x i32> %other
+  %test = icmp sgt <2 x i32> %sel, zeroinitializer
+  ret <2 x i1> %test
+}
+
+define i1 @smin_commute(i32 %other) {
+; CHECK-LABEL: @smin_commute(
+; CHECK-NEXT:    [[TEST:%.*]] = icmp sgt i32 %other, 0
+; CHECK-NEXT:    ret i1 [[TEST]]
+;
+  %positive = load i32, i32* @g, !range !{i32 1, i32 2048}
+  %cmp = icmp slt i32 %other, %positive
+  %sel = select i1 %cmp, i32 %other, i32 %positive
+  %test = icmp sgt i32 %sel, 0
+  ret i1 %test
+}
+
+define <2 x i1> @smin_commute_vec(<2 x i32> %x, <2 x i32> %other) {
+; CHECK-LABEL: @smin_commute_vec(
+; CHECK-NEXT:    [[TEST:%.*]] = icmp sgt <2 x i32> %other, zeroinitializer
+; CHECK-NEXT:    ret <2 x i1> [[TEST]]
+;
+  %notneg = and <2 x i32> %x, <i32 7, i32 7>
+  %positive = or <2 x i32> %notneg, <i32 1, i32 1>
+  %cmp = icmp slt <2 x i32> %other, %positive
+  %sel = select <2 x i1> %cmp, <2 x i32> %other, <2 x i32> %positive
+  %test = icmp sgt <2 x i32> %sel, zeroinitializer
+  ret <2 x i1> %test
+}
+
+; %positive might be zero
+
+define i1 @maybe_not_positive(i32 %other) {
+; CHECK-LABEL: @maybe_not_positive(
+; CHECK-NEXT:    [[POSITIVE:%.*]] = load i32, i32* @g, align 4, !range !0
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[POSITIVE]], %other
+; CHECK-NEXT:    [[SEL:%.*]] = select i1 [[CMP]], i32 [[POSITIVE]], i32 %other
+; CHECK-NEXT:    [[TEST:%.*]] = icmp sgt i32 [[SEL]], 0
+; CHECK-NEXT:    ret i1 [[TEST]]
+;
+  %positive = load i32, i32* @g, !range !{i32 0, i32 2048}
+  %cmp = icmp slt i32 %positive, %other
+  %sel = select i1 %cmp, i32 %positive, i32 %other
+  %test = icmp sgt i32 %sel, 0
+  ret i1 %test
+}
+
+define <2 x i1> @maybe_not_positive_vec(<2 x i32> %x, <2 x i32> %other) {
+; CHECK-LABEL: @maybe_not_positive_vec(
+; CHECK-NEXT:    [[NOTNEG:%.*]] = and <2 x i32> %x, <i32 7, i32 7>
+; CHECK-NEXT:    [[CMP:%.*]] = icmp slt <2 x i32> [[NOTNEG]], %other
+; CHECK-NEXT:    [[SEL:%.*]] = select <2 x i1> [[CMP]], <2 x i32> [[NOTNEG]], <2 x i32> %other
+; CHECK-NEXT:    [[TEST:%.*]] = icmp sgt <2 x i32> [[SEL]], zeroinitializer
+; CHECK-NEXT:    ret <2 x i1> [[TEST]]
+;
+  %notneg = and <2 x i32> %x, <i32 7, i32 7>
+  %cmp = icmp slt <2 x i32> %notneg, %other
+  %sel = select <2 x i1> %cmp, <2 x i32> %notneg, <2 x i32> %other
+  %test = icmp sgt <2 x i32> %sel, zeroinitializer
+  ret <2 x i1> %test
+}
+