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Diffstat (limited to 'llvm/test/Transforms/LoopSimplify/phi-node-simplify.ll')
| -rw-r--r-- | llvm/test/Transforms/LoopSimplify/phi-node-simplify.ll | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/llvm/test/Transforms/LoopSimplify/phi-node-simplify.ll b/llvm/test/Transforms/LoopSimplify/phi-node-simplify.ll new file mode 100644 index 00000000000..6536acb7b03 --- /dev/null +++ b/llvm/test/Transforms/LoopSimplify/phi-node-simplify.ll @@ -0,0 +1,55 @@ +; Loop Simplify should turn phi nodes like X = phi [X, Y] into just Y, eliminating them. +; RUN: opt < %s -loop-simplify -S | grep phi | count 6 + +@A = weak global [3000000 x i32] zeroinitializer ; <[3000000 x i32]*> [#uses=1] +@B = weak global [20000 x i32] zeroinitializer ; <[20000 x i32]*> [#uses=1] +@C = weak global [100 x i32] zeroinitializer ; <[100 x i32]*> [#uses=1] +@Z = weak global i32 0 ; <i32*> [#uses=2] + +define i32 @main() { +entry: + tail call void @__main( ) + br label %loopentry.1 +loopentry.1: ; preds = %loopexit.1, %entry + %indvar20 = phi i32 [ 0, %entry ], [ %indvar.next21, %loopexit.1 ] ; <i32> [#uses=1] + %a.1 = phi i32* [ getelementptr ([3000000 x i32], [3000000 x i32]* @A, i32 0, i32 0), %entry ], [ %inc.0, %loopexit.1 ] ; <i32*> [#uses=1] + br label %no_exit.2 +no_exit.2: ; preds = %loopexit.2, %no_exit.2, %loopentry.1 + %a.0.4.ph = phi i32* [ %a.1, %loopentry.1 ], [ %inc.0, %loopexit.2 ], [ %a.0.4.ph, %no_exit.2 ] ; <i32*> [#uses=3] + %b.1.4.ph = phi i32* [ getelementptr ([20000 x i32], [20000 x i32]* @B, i32 0, i32 0), %loopentry.1 ], [ %inc.1, %loopexit.2 ], [ %b.1.4.ph, %no_exit.2 ] ; <i32*> [#uses=3] + %indvar17 = phi i32 [ 0, %loopentry.1 ], [ %indvar.next18, %loopexit.2 ], [ %indvar17, %no_exit.2 ] ; <i32> [#uses=2] + %indvar = phi i32 [ %indvar.next, %no_exit.2 ], [ 0, %loopexit.2 ], [ 0, %loopentry.1 ] ; <i32> [#uses=5] + %b.1.4.rec = bitcast i32 %indvar to i32 ; <i32> [#uses=1] + %gep.upgrd.1 = zext i32 %indvar to i64 ; <i64> [#uses=1] + %c.2.4 = getelementptr [100 x i32], [100 x i32]* @C, i32 0, i64 %gep.upgrd.1 ; <i32*> [#uses=1] + %gep.upgrd.2 = zext i32 %indvar to i64 ; <i64> [#uses=1] + %a.0.4 = getelementptr i32, i32* %a.0.4.ph, i64 %gep.upgrd.2 ; <i32*> [#uses=1] + %gep.upgrd.3 = zext i32 %indvar to i64 ; <i64> [#uses=1] + %b.1.4 = getelementptr i32, i32* %b.1.4.ph, i64 %gep.upgrd.3 ; <i32*> [#uses=1] + %inc.0.rec = add i32 %b.1.4.rec, 1 ; <i32> [#uses=2] + %inc.0 = getelementptr i32, i32* %a.0.4.ph, i32 %inc.0.rec ; <i32*> [#uses=2] + %tmp.13 = load i32, i32* %a.0.4 ; <i32> [#uses=1] + %inc.1 = getelementptr i32, i32* %b.1.4.ph, i32 %inc.0.rec ; <i32*> [#uses=1] + %tmp.15 = load i32, i32* %b.1.4 ; <i32> [#uses=1] + %tmp.18 = load i32, i32* %c.2.4 ; <i32> [#uses=1] + %tmp.16 = mul i32 %tmp.15, %tmp.13 ; <i32> [#uses=1] + %tmp.19 = mul i32 %tmp.16, %tmp.18 ; <i32> [#uses=1] + %tmp.20 = load i32, i32* @Z ; <i32> [#uses=1] + %tmp.21 = add i32 %tmp.19, %tmp.20 ; <i32> [#uses=1] + store i32 %tmp.21, i32* @Z + %indvar.next = add i32 %indvar, 1 ; <i32> [#uses=2] + %exitcond = icmp eq i32 %indvar.next, 100 ; <i1> [#uses=1] + br i1 %exitcond, label %loopexit.2, label %no_exit.2 +loopexit.2: ; preds = %no_exit.2 + %indvar.next18 = add i32 %indvar17, 1 ; <i32> [#uses=2] + %exitcond19 = icmp eq i32 %indvar.next18, 200 ; <i1> [#uses=1] + br i1 %exitcond19, label %loopexit.1, label %no_exit.2 +loopexit.1: ; preds = %loopexit.2 + %indvar.next21 = add i32 %indvar20, 1 ; <i32> [#uses=2] + %exitcond22 = icmp eq i32 %indvar.next21, 300 ; <i1> [#uses=1] + br i1 %exitcond22, label %return, label %loopentry.1 +return: ; preds = %loopexit.1 + ret i32 undef +} + +declare void @__main() |
