mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-07-21 18:29:45 +00:00
dcfe5f30b5
Previously, LiveIntervalAnalysis would infer phi joins by looking for multiply defined registers. That doesn't work if the phi join is implicitly defined in all but one of the predecessors. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96994 91177308-0d34-0410-b5e6-96231b3b80d8
147 lines
6.1 KiB
LLVM
147 lines
6.1 KiB
LLVM
; 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
|
|
}
|