Import LLVM, at r72732.vendor/llvm/llvm-r72732

1 files changed, 22 insertions, 0 deletions

diff --git a/test/Transforms/IndVarSimplify/lftr_simple.ll b/test/Transforms/IndVarSimplify/lftr_simple.ll
new file mode 100644
index 000000000000..3f7c289a4885
--- /dev/null
+++ b/test/Transforms/IndVarSimplify/lftr_simple.ll
@@ -0,0 +1,22 @@
+; LFTR should eliminate the need for the computation of i*i completely.  It 
+; is only used to compute the exit value.
+; RUN: llvm-as < %s | opt -indvars -dce | llvm-dis | not grep mul
+
+@A = external global i32                ; <i32*> [#uses=1]
+
+define i32 @quadratic_setlt() {
+entry:
+        br label %loop
+
+loop:           ; preds = %loop, %entry
+        %i = phi i32 [ 7, %entry ], [ %i.next, %loop ]          ; <i32> [#uses=5]
+        %i.next = add i32 %i, 1         ; <i32> [#uses=1]
+        store i32 %i, i32* @A
+        %i2 = mul i32 %i, %i            ; <i32> [#uses=1]
+        %c = icmp slt i32 %i2, 1000             ; <i1> [#uses=1]
+        br i1 %c, label %loop, label %loopexit
+
+loopexit:               ; preds = %loop
+        ret i32 %i
+}
+