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53 lines
2.0 KiB
LLVM
53 lines
2.0 KiB
LLVM
; Split loop. Save last value. Split value is off by one in this example.
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; RUN: llvm-as < %s | opt -loop-index-split -disable-output -stats |& \
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; RUN: grep "loop-index-split" | count 1
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@k = external global i32 ; <i32*> [#uses=2]
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define void @foobar(i32 %a, i32 %b) {
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entry:
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br label %bb
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bb: ; preds = %cond_next16, %entry
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%i.01.0 = phi i32 [ 0, %entry ], [ %tmp18, %cond_next16 ] ; <i32> [#uses=5]
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%tsum.18.0 = phi i32 [ 42, %entry ], [ %tsum.013.1, %cond_next16 ] ; <i32> [#uses=3]
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%tmp1 = icmp sgt i32 %i.01.0, 50 ; <i1> [#uses=1]
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br i1 %tmp1, label %cond_true, label %cond_false
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cond_true: ; preds = %bb
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%tmp4 = tail call i32 @foo( i32 %i.01.0 ) ; <i32> [#uses=1]
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%tmp6 = add i32 %tmp4, %tsum.18.0 ; <i32> [#uses=2]
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%tmp914 = load i32* @k, align 4 ; <i32> [#uses=1]
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%tmp1015 = icmp eq i32 %tmp914, 0 ; <i1> [#uses=1]
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br i1 %tmp1015, label %cond_next16, label %cond_true13
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cond_false: ; preds = %bb
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%tmp8 = tail call i32 @bar( i32 %i.01.0 ) ; <i32> [#uses=0]
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%tmp9 = load i32* @k, align 4 ; <i32> [#uses=1]
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%tmp10 = icmp eq i32 %tmp9, 0 ; <i1> [#uses=1]
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br i1 %tmp10, label %cond_next16, label %cond_true13
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cond_true13: ; preds = %cond_false, %cond_true
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%tsum.013.0 = phi i32 [ %tmp6, %cond_true ], [ %tsum.18.0, %cond_false ] ; <i32> [#uses=1]
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%tmp15 = tail call i32 @bar( i32 %i.01.0 ) ; <i32> [#uses=0]
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br label %cond_next16
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cond_next16: ; preds = %cond_false, %cond_true, %cond_true13
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%tsum.013.1 = phi i32 [ %tsum.013.0, %cond_true13 ], [ %tmp6, %cond_true ], [ %tsum.18.0, %cond_false ] ; <i32> [#uses=2]
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%tmp18 = add i32 %i.01.0, 1 ; <i32> [#uses=3]
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%tmp21 = icmp slt i32 %tmp18, 100 ; <i1> [#uses=1]
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br i1 %tmp21, label %bb, label %bb24
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bb24: ; preds = %cond_next16
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%tmp18.lcssa = phi i32 [ %tmp18, %cond_next16 ] ; <i32> [#uses=1]
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%tsum.013.1.lcssa = phi i32 [ %tsum.013.1, %cond_next16 ] ; <i32> [#uses=1]
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%tmp27 = tail call i32 @t( i32 %tmp18.lcssa, i32 %tsum.013.1.lcssa ) ; <i32> [#uses=0]
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ret void
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}
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declare i32 @foo(i32)
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declare i32 @bar(i32)
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declare i32 @t(i32, i32)
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