1 files changed, 61 insertions, 0 deletions
diff --git a/llvm/test/Transforms/InstCombine/icmp-range.ll b/llvm/test/Transforms/InstCombine/icmp-range.ll
new file mode 100644
index 00000000000..97d231f0ea3
--- /dev/null
+++ b/llvm/test/Transforms/InstCombine/icmp-range.ll
@@ -0,0 +1,61 @@
+; RUN: opt < %s -instcombine -S | FileCheck %s
+; These should be InstSimplify checks, but most of the code
+; is currently only in InstCombine.  TODO: move supporting code
+
+; Definitely out of range
+define i1 @test_nonzero(i32* nocapture readonly %arg) {
+; CHECK-LABEL:test_nonzero
+; CHECK: ret i1 true
+  %val = load i32* %arg, !range !0
+  %rval = icmp ne i32 %val, 0
+  ret i1 %rval
+}
+define i1 @test_nonzero2(i32* nocapture readonly %arg) {
+; CHECK-LABEL:test_nonzero2
+; CHECK: ret i1 false
+  %val = load i32* %arg, !range !0
+  %rval = icmp eq i32 %val, 0
+  ret i1 %rval
+}
+
+; Potentially in range
+define i1 @test_nonzero3(i32* nocapture readonly %arg) {
+; CHECK-LABEL: test_nonzero3
+; Check that this does not trigger - it wouldn't be legal
+; CHECK: icmp
+  %val = load i32* %arg, !range !1
+  %rval = icmp ne i32 %val, 0
+  ret i1 %rval
+}
+
+; Definitely in range
+define i1 @test_nonzero4(i8* nocapture readonly %arg) {
+; CHECK-LABEL: test_nonzero4
+; CHECK: ret i1 false
+  %val = load i8* %arg, !range !2
+  %rval = icmp ne i8 %val, 0
+  ret i1 %rval
+}
+
+define i1 @test_nonzero5(i8* nocapture readonly %arg) {
+; CHECK-LABEL: test_nonzero5
+; CHECK: ret i1 false
+  %val = load i8* %arg, !range !2
+  %rval = icmp ugt i8 %val, 0
+  ret i1 %rval
+}
+
+; Cheaper checks (most values in range meet requirements)
+define i1 @test_nonzero6(i8* %argw) {
+; CHECK-LABEL: test_nonzero6
+; CHECK: icmp ne i8 %val, 0
+  %val = load i8* %argw, !range !3
+  %rval = icmp sgt i8 %val, 0
+  ret i1 %rval
+}
+
+
+!0 = metadata !{i32 1, i32 6} 
+!1 = metadata !{i32 0, i32 6} 
+!2 = metadata !{i8 0, i8 1} 
+!3 = metadata !{i8 0, i8 6}