6a82376012
Changes since aec08e: * Adjust placement of a closing brace so that the general case actually runs. Turns out we had *no* coverage of the switch case. I added one in eae90fd. * Drop .llvm.loop.* metadata from the new branch as there is no longer a loop to annotate. Original commit message: This special cases an unconditional latch and a conditional branch latch exit to improve codegen and test readability. I am hoping to reuse this function in the runtime unroll code, but without this change, the test diffs are far too complex to assess.
53 lines
2.1 KiB
LLVM
53 lines
2.1 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -S -loop-deletion -enable-new-pm=0 < %s | FileCheck %s
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; Make sure this does not crash due to incorrect SCEV invalidation (PR49967).
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define void @test() {
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; CHECK-LABEL: @test(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label [[VECTOR_PH:%.*]]
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; CHECK: vector.ph:
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; CHECK-NEXT: br label [[FOR_BODY63:%.*]]
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; CHECK: for.cond.cleanup62:
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; CHECK-NEXT: br label [[FOR_BODY151_PREHEADER:%.*]]
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; CHECK: for.body151.preheader:
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; CHECK-NEXT: br label [[FOR_COND_CLEANUP150_LOOPEXIT:%.*]]
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; CHECK: for.body63:
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; CHECK-NEXT: [[I58_010:%.*]] = phi i16 [ 32, [[VECTOR_PH]] ]
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; CHECK-NEXT: store i16 undef, i16* undef, align 1
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; CHECK-NEXT: [[INC89:%.*]] = add nuw nsw i16 [[I58_010]], 1
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; CHECK-NEXT: [[EXITCOND12_NOT:%.*]] = icmp eq i16 [[INC89]], 33
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; CHECK-NEXT: br label [[FOR_COND_CLEANUP62:%.*]]
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; CHECK: for.cond.cleanup150.loopexit:
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; CHECK-NEXT: unreachable
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;
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entry:
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br label %vector.ph
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vector.ph: ; preds = %for.cond.cleanup62, %entry
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br label %for.body63
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for.cond.cleanup62: ; preds = %for.body63
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br i1 true, label %for.body151.preheader, label %vector.ph
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for.body151.preheader: ; preds = %for.cond.cleanup62
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br label %for.body151
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for.body63: ; preds = %for.body63, %vector.ph
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%i58.010 = phi i16 [ 32, %vector.ph ], [ %inc89, %for.body63 ]
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store i16 undef, i16* undef, align 1
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%inc89 = add nuw nsw i16 %i58.010, 1
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%exitcond12.not = icmp eq i16 %inc89, 33
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br i1 %exitcond12.not, label %for.cond.cleanup62, label %for.body63
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for.cond.cleanup150.loopexit: ; preds = %for.body151
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unreachable
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for.body151: ; preds = %for.body151.preheader, %for.body151
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%i146.29 = phi i16 [ %inc177, %for.body151 ], [ undef, %for.body151.preheader ]
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%inc177 = add nuw nsw i16 %i146.29, 1
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%exitcond.not = icmp eq i16 %inc177, 32
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br i1 %exitcond.not, label %for.cond.cleanup150.loopexit, label %for.body151
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}
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