derek.holloway
7502bf64a4
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48 lines
2.4 KiB
LLVM
48 lines
2.4 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 6
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; RUN: opt -S -passes=loop-fusion < %s 2>&1 | FileCheck %s
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; When the two loops are legal to get fused, and when there are phi nodes in the second loop preheader
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; that will be sunk to the exit block, replace the phi uses with the corresponding incoming value.
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; This fixes llvm issue 165087.
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define i8 @_Z3fn1ssb() {
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; CHECK-LABEL: define i8 @_Z3fn1ssb() {
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; CHECK-NEXT: [[ENTRY:.*]]:
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; CHECK-NEXT: br label %[[FOR_BODY11_1:.*]]
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; CHECK: [[FOR_BODY11_1]]:
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; CHECK-NEXT: [[INDVARS_IV_1:%.*]] = phi i64 [ [[INDVARS_IV_NEXT_1:%.*]], %[[FOR_BODY11_1]] ], [ 2, %[[ENTRY]] ]
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; CHECK-NEXT: [[INDVARS_IV_2:%.*]] = phi i64 [ [[INDVARS_IV_NEXT_2:%.*]], %[[FOR_BODY11_1]] ], [ 2, %[[ENTRY]] ]
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; CHECK-NEXT: [[INDVARS_IV_NEXT_1]] = add i64 [[INDVARS_IV_1]], 1
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; CHECK-NEXT: [[EXITCOND_1_NOT:%.*]] = icmp eq i64 [[INDVARS_IV_NEXT_1]], 0
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; CHECK-NEXT: [[INDVARS_IV_NEXT_2]] = add i64 [[INDVARS_IV_2]], 1
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; CHECK-NEXT: [[EXITCOND_2_NOT:%.*]] = icmp eq i64 [[INDVARS_IV_NEXT_2]], 0
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; CHECK-NEXT: br i1 [[EXITCOND_2_NOT]], label %[[FOR_COND_CLEANUP6_2_LOOPEXIT:.*]], label %[[FOR_BODY11_1]]
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; CHECK: [[FOR_COND_CLEANUP6_2_LOOPEXIT]]:
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; CHECK-NEXT: [[DOTSROA_SPECULATED_2_LCSSA:%.*]] = phi i8 [ 0, %[[FOR_BODY11_1]] ]
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; CHECK-NEXT: ret i8 [[DOTSROA_SPECULATED_2_LCSSA]]
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;
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entry:
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br label %for.body11.1
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for.body11.1: ; preds = %for.body11.1, %entry
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%indvars.iv.1 = phi i64 [ %indvars.iv.next.1, %for.body11.1 ], [ 2, %entry ]
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%indvars.iv.next.1 = add i64 %indvars.iv.1, 1
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%exitcond.1.not = icmp eq i64 %indvars.iv.next.1, 0
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br i1 %exitcond.1.not, label %for.body11.2.preheader, label %for.body11.1
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for.body11.2.preheader: ; preds = %for.body11.1
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%.sroa.speculated.1.lcssa = phi i8 [ 0, %for.body11.1 ]
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br label %for.body11.2
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for.body11.2: ; preds = %for.body11.2, %for.body11.2.preheader
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%indvars.iv.2 = phi i64 [ %indvars.iv.next.2, %for.body11.2 ], [ 2, %for.body11.2.preheader ]
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%indvars.iv.next.2 = add i64 %indvars.iv.2, 1
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%exitcond.2.not = icmp eq i64 %indvars.iv.next.2, 0
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br i1 %exitcond.2.not, label %for.cond.cleanup6.2.loopexit, label %for.body11.2
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for.cond.cleanup6.2.loopexit: ; preds = %for.body11.2
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%.sroa.speculated.2.lcssa = phi i8 [ %.sroa.speculated.1.lcssa, %for.body11.2 ]
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ret i8 %.sroa.speculated.2.lcssa
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}
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