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Diffstat (limited to 'test/CodeGen/X86/2010-02-23-SingleDefPhiJoin.ll')
| -rw-r--r-- | test/CodeGen/X86/2010-02-23-SingleDefPhiJoin.ll | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/test/CodeGen/X86/2010-02-23-SingleDefPhiJoin.ll b/test/CodeGen/X86/2010-02-23-SingleDefPhiJoin.ll new file mode 100644 index 0000000..aeed401 --- /dev/null +++ b/test/CodeGen/X86/2010-02-23-SingleDefPhiJoin.ll @@ -0,0 +1,146 @@ +; 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 +} |