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[LoopUnroll] Add test for SCEV invalidation issue (NFC)
Test for the issue reported at https://reviews.llvm.org/D149331#4387931.
This commit is contained in:
Nikita Popov
parent
3c9cf023db
commit
79115aebb7
104
llvm/test/Transforms/LoopUnroll/scev-invalidation-lcssa.ll
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104
llvm/test/Transforms/LoopUnroll/scev-invalidation-lcssa.ll
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@ -0,0 +1,104 @@
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2
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; RUN: opt -S -passes='print<scalar-evolution>,loop-unroll' -unroll-runtime < %s 2>/dev/null | FileCheck %s
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define i32 @f(i1 %cond1) #0 !prof !0 {
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; CHECK-LABEL: define i32 @f
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; CHECK-SAME: (i1 [[COND1:%.*]]) !prof [[PROF0:![0-9]+]] {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label [[LOOP1_PEEL_BEGIN:%.*]]
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; CHECK: loop1.peel.begin:
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; CHECK-NEXT: br label [[LOOP1_PEEL:%.*]]
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; CHECK: loop1.peel:
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; CHECK-NEXT: [[LD_PEEL:%.*]] = load i64, ptr null, align 8
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; CHECK-NEXT: br i1 [[COND1]], label [[LOOP1_PEEL_NEXT:%.*]], label [[EXIT1:%.*]], !prof [[PROF1:![0-9]+]]
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; CHECK: loop1.peel.next:
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; CHECK-NEXT: br label [[LOOP1_PEEL_NEXT1:%.*]]
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; CHECK: loop1.peel.next1:
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; CHECK-NEXT: br label [[ENTRY_PEEL_NEWPH:%.*]]
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; CHECK: entry.peel.newph:
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; CHECK-NEXT: br label [[LOOP1:%.*]]
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; CHECK: loop1:
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; CHECK-NEXT: [[LD:%.*]] = load i64, ptr null, align 8
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; CHECK-NEXT: br i1 [[COND1]], label [[LOOP1]], label [[EXIT1_LOOPEXIT:%.*]], !prof [[PROF2:![0-9]+]], !llvm.loop [[LOOP3:![0-9]+]]
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; CHECK: exit1.loopexit:
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; CHECK-NEXT: [[LD_LCSSA_PH:%.*]] = phi i64 [ [[LD]], [[LOOP1]] ]
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; CHECK-NEXT: br label [[EXIT1]]
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; CHECK: exit1:
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; CHECK-NEXT: [[LD_LCSSA:%.*]] = phi i64 [ [[LD_PEEL]], [[LOOP1_PEEL]] ], [ [[LD_LCSSA_PH]], [[EXIT1_LOOPEXIT]] ]
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; CHECK-NEXT: br label [[ENTRY2:%.*]]
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; CHECK: entry2:
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; CHECK-NEXT: [[TMP0:%.*]] = add i64 [[LD_LCSSA]], 1
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; CHECK-NEXT: [[XTRAITER:%.*]] = and i64 [[TMP0]], 7
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; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i64 [[LD_LCSSA]], 7
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; CHECK-NEXT: br i1 [[TMP1]], label [[EXIT2_UNR_LCSSA:%.*]], label [[ENTRY2_NEW:%.*]]
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; CHECK: entry2.new:
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; CHECK-NEXT: [[UNROLL_ITER:%.*]] = sub i64 [[TMP0]], [[XTRAITER]]
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; CHECK-NEXT: br label [[LOOP2:%.*]]
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; CHECK: loop2:
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; CHECK-NEXT: [[PHI:%.*]] = phi i64 [ 0, [[ENTRY2_NEW]] ], [ [[INC_7:%.*]], [[LOOP2]] ]
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; CHECK-NEXT: [[NITER:%.*]] = phi i64 [ 0, [[ENTRY2_NEW]] ], [ [[NITER_NEXT_7:%.*]], [[LOOP2]] ]
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; CHECK-NEXT: [[INC:%.*]] = add nuw nsw i64 [[PHI]], 1
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; CHECK-NEXT: [[NITER_NEXT:%.*]] = add nuw nsw i64 [[NITER]], 1
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; CHECK-NEXT: [[INC_1:%.*]] = add nuw nsw i64 [[INC]], 1
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; CHECK-NEXT: [[NITER_NEXT_1:%.*]] = add nuw nsw i64 [[NITER_NEXT]], 1
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; CHECK-NEXT: [[INC_2:%.*]] = add nuw nsw i64 [[INC_1]], 1
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; CHECK-NEXT: [[NITER_NEXT_2:%.*]] = add nuw nsw i64 [[NITER_NEXT_1]], 1
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; CHECK-NEXT: [[INC_3:%.*]] = add nuw nsw i64 [[INC_2]], 1
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; CHECK-NEXT: [[NITER_NEXT_3:%.*]] = add nuw nsw i64 [[NITER_NEXT_2]], 1
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; CHECK-NEXT: [[INC_4:%.*]] = add nuw nsw i64 [[INC_3]], 1
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; CHECK-NEXT: [[NITER_NEXT_4:%.*]] = add nuw nsw i64 [[NITER_NEXT_3]], 1
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; CHECK-NEXT: [[INC_5:%.*]] = add nuw nsw i64 [[INC_4]], 1
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; CHECK-NEXT: [[NITER_NEXT_5:%.*]] = add nuw nsw i64 [[NITER_NEXT_4]], 1
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; CHECK-NEXT: [[INC_6:%.*]] = add nuw nsw i64 [[INC_5]], 1
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; CHECK-NEXT: [[NITER_NEXT_6:%.*]] = add nuw nsw i64 [[NITER_NEXT_5]], 1
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; CHECK-NEXT: [[INC_7]] = add i64 [[INC_6]], 1
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; CHECK-NEXT: [[NITER_NEXT_7]] = add i64 [[NITER_NEXT_6]], 1
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; CHECK-NEXT: [[NITER_NCMP_7:%.*]] = icmp eq i64 [[NITER_NEXT_7]], [[UNROLL_ITER]]
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; CHECK-NEXT: br i1 [[NITER_NCMP_7]], label [[EXIT2_UNR_LCSSA_LOOPEXIT:%.*]], label [[LOOP2]]
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; CHECK: exit2.unr-lcssa.loopexit:
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; CHECK-NEXT: [[PHI_UNR_PH:%.*]] = phi i64 [ [[INC_7]], [[LOOP2]] ]
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; CHECK-NEXT: br label [[EXIT2_UNR_LCSSA]]
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; CHECK: exit2.unr-lcssa:
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; CHECK-NEXT: [[PHI_UNR:%.*]] = phi i64 [ 0, [[ENTRY2]] ], [ [[PHI_UNR_PH]], [[EXIT2_UNR_LCSSA_LOOPEXIT]] ]
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; CHECK-NEXT: [[LCMP_MOD:%.*]] = icmp ne i64 [[XTRAITER]], 0
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; CHECK-NEXT: br i1 [[LCMP_MOD]], label [[LOOP2_EPIL_PREHEADER:%.*]], label [[EXIT2:%.*]]
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; CHECK: loop2.epil.preheader:
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; CHECK-NEXT: br label [[LOOP2_EPIL:%.*]]
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; CHECK: loop2.epil:
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; CHECK-NEXT: [[PHI_EPIL:%.*]] = phi i64 [ [[PHI_UNR]], [[LOOP2_EPIL_PREHEADER]] ], [ [[INC_EPIL:%.*]], [[LOOP2_EPIL]] ]
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; CHECK-NEXT: [[EPIL_ITER:%.*]] = phi i64 [ 0, [[LOOP2_EPIL_PREHEADER]] ], [ [[EPIL_ITER_NEXT:%.*]], [[LOOP2_EPIL]] ]
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; CHECK-NEXT: [[INC_EPIL]] = add i64 [[PHI_EPIL]], 1
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; CHECK-NEXT: [[COND2_EPIL:%.*]] = icmp eq i64 [[LD_LCSSA]], [[PHI_EPIL]]
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; CHECK-NEXT: [[EPIL_ITER_NEXT]] = add i64 [[EPIL_ITER]], 1
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; CHECK-NEXT: [[EPIL_ITER_CMP:%.*]] = icmp ne i64 [[EPIL_ITER_NEXT]], [[XTRAITER]]
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; CHECK-NEXT: br i1 [[EPIL_ITER_CMP]], label [[LOOP2_EPIL]], label [[EXIT2_EPILOG_LCSSA:%.*]], !llvm.loop [[LOOP6:![0-9]+]]
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; CHECK: exit2.epilog-lcssa:
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; CHECK-NEXT: br label [[EXIT2]]
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; CHECK: exit2:
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; CHECK-NEXT: ret i32 0
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;
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entry:
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br label %loop1
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loop1:
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%ld = load i64, ptr null, align 8
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br i1 %cond1, label %loop1, label %exit1, !prof !1
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exit1:
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br label %entry2
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entry2:
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br label %loop2
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loop2:
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%phi = phi i64 [ 0, %entry2 ], [ %inc, %loop2 ]
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%inc = add i64 %phi, 1
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%cond2 = icmp eq i64 %ld, %phi
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br i1 %cond2, label %exit2, label %loop2
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exit2:
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ret i32 0
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}
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!0 = !{!"function_entry_count", i64 1}
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!1 = !{!"branch_weights", i32 123, i32 472}
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