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bf5c9cd119
Optimize trivial branches in CodeGenPrepare, which often get created from the lowering of objectsize intrinsics. Unfortunately, a number of tests were relying on llc not optimizing trivial branches, so I had to add an option to allow them to continue to test what they originally tested. This fixes <rdar://problem/8785296> and <rdar://problem/9112893>. llvm-svn: 127498
40 lines
1.4 KiB
LLVM
40 lines
1.4 KiB
LLVM
; RUN: llc < %s -mtriple=x86_64-appel-darwin -disable-cgp-branch-opts -stats |& grep {machine-sink}
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define fastcc void @t() nounwind ssp {
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entry:
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br i1 undef, label %bb, label %bb4
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bb: ; preds = %entry
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br i1 undef, label %return, label %bb3
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bb3: ; preds = %bb
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unreachable
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bb4: ; preds = %entry
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br i1 undef, label %bb.nph, label %return
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bb.nph: ; preds = %bb4
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br label %bb5
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bb5: ; preds = %bb9, %bb.nph
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%indvar = phi i64 [ 0, %bb.nph ], [ %tmp12, %bb9 ] ; <i64> [#uses=1]
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%tmp12 = add i64 %indvar, 1 ; <i64> [#uses=2]
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%tmp13 = trunc i64 %tmp12 to i32 ; <i32> [#uses=0]
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br i1 undef, label %bb9, label %bb6
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bb6: ; preds = %bb5
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br i1 undef, label %bb9, label %bb7
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bb7: ; preds = %bb6
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br i1 undef, label %bb9, label %bb8
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bb8: ; preds = %bb7
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unreachable
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bb9: ; preds = %bb7, %bb6, %bb5
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br i1 undef, label %bb5, label %return
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return: ; preds = %bb9, %bb4, %bb
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ret void
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}
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