| ; RUN: llc < %s |
| ; PR6363 |
| ; |
| ; This test case creates a phi join register with a single definition. The other |
| ; predecessor blocks are implicit-def. |
| ; |
| ; If LiveIntervalAnalysis fails to recognize this as a phi join, the coalescer |
| ; will detect an infinity valno loop. |
| ; |
| target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128" |
| target triple = "x86_64-unknown-linux-gnu" |
| |
| define i32 @decode(i8* nocapture %input, i32 %offset, i8* nocapture %output) nounwind { |
| entry: |
| br i1 undef, label %meshBB86, label %meshBB102 |
| |
| bb: ; preds = %meshBB106, %meshBB102 |
| br i1 false, label %bb9, label %meshBB90 |
| |
| bb.nph: ; preds = %meshBB90 |
| br label %meshBB114 |
| |
| bb.nph.fragment: ; preds = %meshBB114 |
| br label %meshBB118 |
| |
| bb1.fragment: ; preds = %meshBB118 |
| br i1 false, label %bb2, label %bb3 |
| |
| bb2: ; preds = %bb1.fragment |
| br label %meshBB74 |
| |
| bb2.fragment15: ; preds = %meshBB74 |
| br label %meshBB98 |
| |
| bb3: ; preds = %bb1.fragment |
| br i1 undef, label %meshBB, label %meshBB102 |
| |
| bb4: ; preds = %meshBB |
| br label %meshBB118 |
| |
| bb4.fragment: ; preds = %meshBB118 |
| br label %meshBB82 |
| |
| bb5: ; preds = %meshBB102, %meshBB82 |
| br i1 false, label %bb6, label %bb7 |
| |
| bb6: ; preds = %bb5 |
| br label %bb7 |
| |
| bb7: ; preds = %meshBB98, %bb6, %bb5 |
| br label %meshBB114 |
| |
| bb7.fragment: ; preds = %meshBB114 |
| br i1 undef, label %meshBB74, label %bb9 |
| |
| bb9: ; preds = %bb7.fragment, %bb |
| br label %bb1.i23 |
| |
| bb1.i23: ; preds = %meshBB110, %bb9 |
| br i1 undef, label %meshBB106, label %meshBB110 |
| |
| skip_to_newline.exit26: ; preds = %meshBB106 |
| br label %meshBB86 |
| |
| skip_to_newline.exit26.fragment: ; preds = %meshBB86 |
| br i1 false, label %meshBB90, label %meshBB106 |
| |
| bb11.fragment: ; preds = %meshBB90, %meshBB86 |
| br label %meshBB122 |
| |
| bb1.i: ; preds = %meshBB122, %meshBB |
| %ooffset.2.lcssa.phi.SV.phi203 = phi i32 [ 0, %meshBB122 ], [ %ooffset.2.lcssa.phi.SV.phi233, %meshBB ] ; <i32> [#uses=1] |
| br label %meshBB98 |
| |
| bb1.i.fragment: ; preds = %meshBB98 |
| br i1 undef, label %meshBB78, label %meshBB |
| |
| skip_to_newline.exit: ; preds = %meshBB78 |
| br i1 undef, label %bb12, label %meshBB110 |
| |
| bb12: ; preds = %skip_to_newline.exit |
| br label %meshBB94 |
| |
| bb12.fragment: ; preds = %meshBB94 |
| br i1 false, label %bb13, label %meshBB78 |
| |
| bb13: ; preds = %bb12.fragment |
| br label %meshBB82 |
| |
| bb13.fragment: ; preds = %meshBB82 |
| br i1 undef, label %meshBB94, label %meshBB122 |
| |
| bb14: ; preds = %meshBB94 |
| ret i32 %ooffset.2.lcssa.phi.SV.phi250 |
| |
| bb15: ; preds = %meshBB122, %meshBB110, %meshBB78 |
| unreachable |
| |
| meshBB: ; preds = %bb1.i.fragment, %bb3 |
| %ooffset.2.lcssa.phi.SV.phi233 = phi i32 [ undef, %bb3 ], [ %ooffset.2.lcssa.phi.SV.phi209, %bb1.i.fragment ] ; <i32> [#uses=1] |
| br i1 undef, label %bb1.i, label %bb4 |
| |
| meshBB74: ; preds = %bb7.fragment, %bb2 |
| br i1 false, label %meshBB118, label %bb2.fragment15 |
| |
| meshBB78: ; preds = %bb12.fragment, %bb1.i.fragment |
| %ooffset.2.lcssa.phi.SV.phi239 = phi i32 [ %ooffset.2.lcssa.phi.SV.phi209, %bb1.i.fragment ], [ %ooffset.2.lcssa.phi.SV.phi250, %bb12.fragment ] ; <i32> [#uses=1] |
| br i1 false, label %bb15, label %skip_to_newline.exit |
| |
| meshBB82: ; preds = %bb13, %bb4.fragment |
| br i1 false, label %bb5, label %bb13.fragment |
| |
| meshBB86: ; preds = %skip_to_newline.exit26, %entry |
| br i1 undef, label %skip_to_newline.exit26.fragment, label %bb11.fragment |
| |
| meshBB90: ; preds = %skip_to_newline.exit26.fragment, %bb |
| br i1 false, label %bb11.fragment, label %bb.nph |
| |
| meshBB94: ; preds = %bb13.fragment, %bb12 |
| %ooffset.2.lcssa.phi.SV.phi250 = phi i32 [ 0, %bb13.fragment ], [ %ooffset.2.lcssa.phi.SV.phi239, %bb12 ] ; <i32> [#uses=2] |
| br i1 false, label %bb12.fragment, label %bb14 |
| |
| meshBB98: ; preds = %bb1.i, %bb2.fragment15 |
| %ooffset.2.lcssa.phi.SV.phi209 = phi i32 [ undef, %bb2.fragment15 ], [ %ooffset.2.lcssa.phi.SV.phi203, %bb1.i ] ; <i32> [#uses=2] |
| br i1 undef, label %bb1.i.fragment, label %bb7 |
| |
| meshBB102: ; preds = %bb3, %entry |
| br i1 undef, label %bb5, label %bb |
| |
| meshBB106: ; preds = %skip_to_newline.exit26.fragment, %bb1.i23 |
| br i1 undef, label %bb, label %skip_to_newline.exit26 |
| |
| meshBB110: ; preds = %skip_to_newline.exit, %bb1.i23 |
| br i1 false, label %bb15, label %bb1.i23 |
| |
| meshBB114: ; preds = %bb7, %bb.nph |
| %meshStackVariable115.phi = phi i32 [ 19, %bb7 ], [ 8, %bb.nph ] ; <i32> [#uses=0] |
| br i1 undef, label %bb.nph.fragment, label %bb7.fragment |
| |
| meshBB118: ; preds = %meshBB74, %bb4, %bb.nph.fragment |
| %meshCmp121 = icmp eq i32 undef, 10 ; <i1> [#uses=1] |
| br i1 %meshCmp121, label %bb4.fragment, label %bb1.fragment |
| |
| meshBB122: ; preds = %bb13.fragment, %bb11.fragment |
| br i1 false, label %bb1.i, label %bb15 |
| } |
