Mercurial > hg > CbC > CbC_llvm
comparison llvm/test/Transforms/LICM/2003-02-27-PreheaderProblem.ll @ 150:1d019706d866
LLVM10
| author | anatofuz |
|---|---|
| date | Thu, 13 Feb 2020 15:10:13 +0900 |
| parents | |
| children | 2e18cbf3894f |
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| 147:c2174574ed3a | 150:1d019706d866 |
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| 1 ; Here we have a case where there are two loops and LICM is hoisting an | |
| 2 ; instruction from one loop into the other loop! This is obviously bad and | |
| 3 ; happens because preheader insertion doesn't insert a preheader for this | |
| 4 ; case... bad. | |
| 5 | |
| 6 ; RUN: opt < %s -licm -loop-deletion -simplifycfg -S | \ | |
| 7 ; RUN: not grep "br " | |
| 8 | |
| 9 define i32 @main(i32 %argc) { | |
| 10 ; <label>:0 | |
| 11 br label %bb5 | |
| 12 bb5: ; preds = %bb5, %0 | |
| 13 %I = phi i32 [ 0, %0 ], [ %I2, %bb5 ] ; <i32> [#uses=1] | |
| 14 %I2 = add i32 %I, 1 ; <i32> [#uses=2] | |
| 15 %c = icmp eq i32 %I2, 10 ; <i1> [#uses=1] | |
| 16 br i1 %c, label %bb5, label %bb8 | |
| 17 bb8: ; preds = %bb8, %bb5 | |
| 18 %cann-indvar = phi i32 [ 0, %bb8 ], [ 0, %bb5 ] ; <i32> [#uses=0] | |
| 19 %X = add i32 %argc, %argc ; <i32> [#uses=1] | |
| 20 br i1 false, label %bb8, label %bb10 | |
| 21 bb10: ; preds = %bb8 | |
| 22 ret i32 %X | |
| 23 } | |
| 24 |