diff options
Diffstat (limited to 'test/Transforms/IndVarSimplify/lftr_simple.ll')
-rw-r--r-- | test/Transforms/IndVarSimplify/lftr_simple.ll | 22 |
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 0000000..3f7c289 --- /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 +} + |