1 files changed, 98 insertions, 0 deletions
diff --git a/test/Transforms/IndVarSimplify/canonicalize-cmp.ll b/test/Transforms/IndVarSimplify/canonicalize-cmp.ll
new file mode 100644
index 000000000000..2b939767284a
--- /dev/null
+++ b/test/Transforms/IndVarSimplify/canonicalize-cmp.ll
@@ -0,0 +1,98 @@
+; RUN: opt -S -indvars < %s | FileCheck %s
+
+; Check that we replace signed comparisons between non-negative values with
+; unsigned comparisons if we can.
+
+target datalayout = "n8:16:32:64"
+
+define i32 @test_01(i32 %a, i32 %b, i32* %p) {
+
+; CHECK-LABEL: @test_01(
+; CHECK-NOT:   icmp slt
+; CHECK:       %cmp1 = icmp ult i32 %iv, 100
+; CHECK:       %cmp2 = icmp ult i32 %iv, 100
+; CHECK-NOT:   %cmp3
+; CHECK:       %exitcond = icmp ne i32 %iv.next, 1000
+
+entry:
+  br label %loop.entry
+
+loop.entry:
+  %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop.be ]
+  %cmp1 = icmp slt i32 %iv, 100
+  br i1 %cmp1, label %b1, label %b2
+
+b1:
+  store i32 %iv, i32* %p
+  br label %merge
+
+b2:
+  store i32 %a, i32* %p
+  br label %merge
+
+merge:
+  %cmp2 = icmp ult i32 %iv, 100
+  br i1 %cmp2, label %b3, label %b4
+
+b3:
+  store i32 %iv, i32* %p
+  br label %loop.be
+
+b4:
+  store i32 %b, i32* %p
+  br label %loop.be
+
+loop.be:
+  %iv.next = add i32 %iv, 1
+  %cmp3 = icmp slt i32 %iv.next, 1000
+  br i1 %cmp3, label %loop.entry, label %exit
+
+exit:
+  ret i32 %iv
+}
+
+define i32 @test_02(i32 %a, i32 %b, i32* %p) {
+
+; CHECK-LABEL: @test_02(
+; CHECK-NOT:   icmp sgt
+; CHECK:       %cmp1 = icmp ugt i32 100, %iv
+; CHECK:       %cmp2 = icmp ugt i32 100, %iv
+; CHECK-NOT:   %cmp3
+; CHECK:       %exitcond = icmp ne i32 %iv.next, 1000
+
+entry:
+  br label %loop.entry
+
+loop.entry:
+  %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop.be ]
+  %cmp1 = icmp sgt i32 100, %iv
+  br i1 %cmp1, label %b1, label %b2
+
+b1:
+  store i32 %iv, i32* %p
+  br label %merge
+
+b2:
+  store i32 %a, i32* %p
+  br label %merge
+
+merge:
+  %cmp2 = icmp ugt i32 100, %iv
+  br i1 %cmp2, label %b3, label %b4
+
+b3:
+  store i32 %iv, i32* %p
+  br label %loop.be
+
+b4:
+  store i32 %b, i32* %p
+  br label %loop.be
+
+loop.be:
+  %iv.next = add i32 %iv, 1
+  %cmp3 = icmp sgt i32 1000, %iv.next
+  br i1 %cmp3, label %loop.entry, label %exit
+
+exit:
+  ret i32 %iv
+}