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09d83ebb79
This patch aims to revert the changes introduced by D70781 D71192 D76364 D70781 was introduced to fix hardware hang where we do not insert exp- null-done for a kill inside infinit loop. At that time we have not added exp-null-done for kill early termination, but I believe as for now, we will always add the exp-null-done for early termination case in LaterBranchLowering. D71192 was introduced to handle the only_kill case, which is also been handled by the kill early termination work. D76364 was used to fix a regression by D71192, where we cleared the done bit of the export in the existing program and not let the normal return block branching to the new unified return block. With this change, we just trust frontends have setup exp-done correctly which is true for all existing frontends. The backend only inserts exp-null-done for the kill cases which is handled in SILateBranchLowering.cpp. Reviewed by: critson Differential Revision: https://reviews.llvm.org/D105610
40 lines
1.5 KiB
LLVM
40 lines
1.5 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -mtriple=amdgcn-- -S -amdgpu-unify-divergent-exit-nodes -verify -simplifycfg-require-and-preserve-domtree=1 %s | FileCheck -check-prefix=IR %s
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; Make sure that the phi in n28 is updated when the block is split by unify
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; divergent exit nodes.
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define amdgpu_ps void @_amdgpu_ps_main() local_unnamed_addr #3 {
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; IR-LABEL: @_amdgpu_ps_main(
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; IR-NEXT: .entry:
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; IR-NEXT: br label [[DOTLOOPEXIT:%.*]]
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; IR: .loopexit:
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; IR-NEXT: br label [[N28:%.*]]
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; IR: n28:
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; IR-NEXT: [[DOT01:%.*]] = phi float [ 0.000000e+00, [[DOTLOOPEXIT]] ], [ [[N29:%.*]], [[TRANSITIONBLOCK:%.*]] ]
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; IR-NEXT: [[N29]] = fadd float [[DOT01]], 1.000000e+00
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; IR-NEXT: [[N30:%.*]] = fcmp ogt float [[N29]], 4.000000e+00
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; IR-NEXT: br i1 true, label [[TRANSITIONBLOCK]], label [[DUMMYRETURNBLOCK:%.*]]
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; IR: TransitionBlock:
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; IR-NEXT: br i1 [[N30]], label [[DOTLOOPEXIT]], label [[N28]]
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; IR: n31:
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; IR-NEXT: ret void
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; IR: DummyReturnBlock:
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; IR-NEXT: ret void
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;
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.entry:
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br label %.loopexit
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.loopexit: ; preds = %n28, %.entry
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br label %n28
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n28: ; preds = %.loopexit, %n28
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%.01 = phi float [ 0.000000e+00, %.loopexit ], [ %n29, %n28 ]
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%n29 = fadd float %.01, 1.0
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%n30 = fcmp ogt float %n29, 4.000000e+00
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br i1 %n30, label %.loopexit, label %n28
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n31: ; preds =
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ret void
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}
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