forked from OSchip/llvm-project
43 lines
1.3 KiB
LLVM
43 lines
1.3 KiB
LLVM
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; RUN: opt < %s -S -gvn-sink | FileCheck %s
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; Because %tmp17 has flipped operands to its equivalents %tmp14 and %tmp7, we
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; can't sink the zext as we'd need a shuffling PHI in between.
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;
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; Just sinking the zext isn't profitable, so ensure nothing is sunk.
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; CHECK-LABEL: @hoge
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; CHECK-NOT: bb18.gvnsink.split
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define void @hoge() {
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bb:
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br i1 undef, label %bb4, label %bb11
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bb4: ; preds = %bb3
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br i1 undef, label %bb6, label %bb8
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bb6: ; preds = %bb5
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%tmp = zext i16 undef to i64
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%tmp7 = add i64 %tmp, undef
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br label %bb18
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bb8: ; preds = %bb5
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%tmp9 = zext i16 undef to i64
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br label %bb18
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bb11: ; preds = %bb10
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br i1 undef, label %bb12, label %bb15
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bb12: ; preds = %bb11
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%tmp13 = zext i16 undef to i64
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%tmp14 = add i64 %tmp13, undef
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br label %bb18
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bb15: ; preds = %bb11
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%tmp16 = zext i16 undef to i64
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%tmp17 = add i64 undef, %tmp16
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br label %bb18
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bb18: ; preds = %bb15, %bb12, %bb8, %bb6
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%tmp19 = phi i64 [ %tmp7, %bb6 ], [ undef, %bb8 ], [ %tmp14, %bb12 ], [ %tmp17, %bb15 ]
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unreachable
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}
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