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- ; Here we have a case where there are two loops and LICM is hoisting an
- ; instruction from one loop into the other loop! This is obviously bad and
- ; happens because preheader insertion doesn't insert a preheader for this
- ; case... bad.
- ; RUN: opt < %s -licm -loop-deletion -simplifycfg -S | \
- ; RUN: not grep "br "
- define i32 @main(i32 %argc) {
- ; <label>:0
- br label %bb5
- bb5: ; preds = %bb5, %0
- %I = phi i32 [ 0, %0 ], [ %I2, %bb5 ] ; <i32> [#uses=1]
- %I2 = add i32 %I, 1 ; <i32> [#uses=2]
- %c = icmp eq i32 %I2, 10 ; <i1> [#uses=1]
- br i1 %c, label %bb5, label %bb8
- bb8: ; preds = %bb8, %bb5
- %cann-indvar = phi i32 [ 0, %bb8 ], [ 0, %bb5 ] ; <i32> [#uses=0]
- %X = add i32 %argc, %argc ; <i32> [#uses=1]
- br i1 false, label %bb8, label %bb10
- bb10: ; preds = %bb8
- ret i32 %X
- }
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