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clang-p2996/llvm/test/Transforms/LoopPredication/visited.ll
Philip Reames d109e2a7c3 [LoopPred] Delete the old condition expressions if unused 
LoopPredication was replacing the original condition, but leaving the instructions to compute the old conditions around.  This would get cleaned up by other passes of course, but we might as well do it eagerly.  That also makes the test output less confusing.  

llvm-svn: 357406
2019-04-01 16:05:15 +00:00

162 lines
8.3 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -S -loop-predication < %s 2>&1 | FileCheck %s
; RUN: opt -S -passes='require<scalar-evolution>,loop(loop-predication)' < %s 2>&1 | FileCheck %s
declare void @llvm.experimental.guard(i1, ...)
define i32 @test_visited(i32* %array, i32 %length, i32 %n, i32 %x) {
; CHECK-LABEL: @test_visited(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[TMP5:%.*]] = icmp eq i32 [[N:%.*]], 0
; CHECK-NEXT: br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]]
; CHECK: loop.preheader:
; CHECK-NEXT: [[TMP0:%.*]] = icmp ule i32 [[N]], [[LENGTH:%.*]]
; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i32 0, [[LENGTH]]
; CHECK-NEXT: [[TMP2:%.*]] = and i1 [[TMP1]], [[TMP0]]
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT: [[UNRELATED_COND:%.*]] = icmp eq i32 [[X:%.*]], [[I]]
; CHECK-NEXT: [[TMP3:%.*]] = and i1 [[UNRELATED_COND]], [[TMP2]]
; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[TMP3]], i32 9) [ "deopt"() ]
; CHECK-NEXT: [[I_I64:%.*]] = zext i32 [[I]] to i64
; CHECK-NEXT: [[ARRAY_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY:%.*]], i64 [[I_I64]]
; CHECK-NEXT: [[ARRAY_I:%.*]] = load i32, i32* [[ARRAY_I_PTR]], align 4
; CHECK-NEXT: [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC]], [[ARRAY_I]]
; CHECK-NEXT: [[I_NEXT]] = add nuw i32 [[I]], 1
; CHECK-NEXT: [[CONTINUE:%.*]] = icmp ult i32 [[I_NEXT]], [[N]]
; CHECK-NEXT: br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]]
; CHECK: exit.loopexit:
; CHECK-NEXT: [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ]
; CHECK-NEXT: br label [[EXIT]]
; CHECK: exit:
; CHECK-NEXT: [[RESULT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_ACC_NEXT_LCSSA]], [[EXIT_LOOPEXIT]] ]
; CHECK-NEXT: ret i32 [[RESULT]]
;
entry:
%tmp5 = icmp eq i32 %n, 0
br i1 %tmp5, label %exit, label %loop.preheader
loop.preheader:
br label %loop
loop:
%loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ]
%i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ]
%within.bounds = icmp ult i32 %i, %length
%unrelated.cond = icmp eq i32 %x, %i
%guard.cond.2 = and i1 %within.bounds, %unrelated.cond
%guard.cond.3 = and i1 %guard.cond.2, %unrelated.cond
%guard.cond.4 = and i1 %guard.cond.3, %guard.cond.2
%guard.cond.5 = and i1 %guard.cond.4, %guard.cond.3
%guard.cond.6 = and i1 %guard.cond.5, %guard.cond.4
%guard.cond.7 = and i1 %guard.cond.6, %guard.cond.5
%guard.cond.8 = and i1 %guard.cond.7, %guard.cond.6
%guard.cond.9 = and i1 %guard.cond.8, %guard.cond.7
%guard.cond.10 = and i1 %guard.cond.9, %guard.cond.8
%guard.cond.11 = and i1 %guard.cond.10, %guard.cond.9
%guard.cond.12 = and i1 %guard.cond.11, %guard.cond.10
%guard.cond.13 = and i1 %guard.cond.12, %guard.cond.11
%guard.cond.14 = and i1 %guard.cond.13, %guard.cond.12
%guard.cond.15 = and i1 %guard.cond.14, %guard.cond.13
%guard.cond.16 = and i1 %guard.cond.15, %guard.cond.14
%guard.cond.17 = and i1 %guard.cond.16, %guard.cond.15
%guard.cond.18 = and i1 %guard.cond.17, %guard.cond.16
%guard.cond.19 = and i1 %guard.cond.18, %guard.cond.17
%guard.cond.20 = and i1 %guard.cond.19, %guard.cond.18
%guard.cond.21 = and i1 %guard.cond.20, %guard.cond.19
%guard.cond.22 = and i1 %guard.cond.21, %guard.cond.20
%guard.cond.23 = and i1 %guard.cond.22, %guard.cond.21
%guard.cond.24 = and i1 %guard.cond.23, %guard.cond.22
%guard.cond.25 = and i1 %guard.cond.24, %guard.cond.23
%guard.cond.26 = and i1 %guard.cond.25, %guard.cond.24
%guard.cond.27 = and i1 %guard.cond.26, %guard.cond.25
%guard.cond.28 = and i1 %guard.cond.27, %guard.cond.26
%guard.cond.29 = and i1 %guard.cond.28, %guard.cond.27
%guard.cond.30 = and i1 %guard.cond.29, %guard.cond.28
%guard.cond.31 = and i1 %guard.cond.30, %guard.cond.29
%guard.cond.32 = and i1 %guard.cond.31, %guard.cond.30
%guard.cond.33 = and i1 %guard.cond.32, %guard.cond.31
%guard.cond.34 = and i1 %guard.cond.33, %guard.cond.32
%guard.cond.35 = and i1 %guard.cond.34, %guard.cond.33
%guard.cond.36 = and i1 %guard.cond.35, %guard.cond.34
%guard.cond.37 = and i1 %guard.cond.36, %guard.cond.35
%guard.cond.38 = and i1 %guard.cond.37, %guard.cond.36
%guard.cond.39 = and i1 %guard.cond.38, %guard.cond.37
%guard.cond.40 = and i1 %guard.cond.39, %guard.cond.38
%guard.cond.41 = and i1 %guard.cond.40, %guard.cond.39
%guard.cond.42 = and i1 %guard.cond.41, %guard.cond.40
%guard.cond.43 = and i1 %guard.cond.42, %guard.cond.41
%guard.cond.44 = and i1 %guard.cond.43, %guard.cond.42
%guard.cond.45 = and i1 %guard.cond.44, %guard.cond.43
%guard.cond.46 = and i1 %guard.cond.45, %guard.cond.44
%guard.cond.47 = and i1 %guard.cond.46, %guard.cond.45
%guard.cond.48 = and i1 %guard.cond.47, %guard.cond.46
%guard.cond.49 = and i1 %guard.cond.48, %guard.cond.47
%guard.cond.50 = and i1 %guard.cond.49, %guard.cond.48
%guard.cond.51 = and i1 %guard.cond.50, %guard.cond.49
%guard.cond.52 = and i1 %guard.cond.51, %guard.cond.50
%guard.cond.53 = and i1 %guard.cond.52, %guard.cond.51
%guard.cond.54 = and i1 %guard.cond.53, %guard.cond.52
%guard.cond.55 = and i1 %guard.cond.54, %guard.cond.53
%guard.cond.56 = and i1 %guard.cond.55, %guard.cond.54
%guard.cond.57 = and i1 %guard.cond.56, %guard.cond.55
%guard.cond.58 = and i1 %guard.cond.57, %guard.cond.56
%guard.cond.59 = and i1 %guard.cond.58, %guard.cond.57
%guard.cond.60 = and i1 %guard.cond.59, %guard.cond.58
%guard.cond.61 = and i1 %guard.cond.60, %guard.cond.59
%guard.cond.62 = and i1 %guard.cond.61, %guard.cond.60
%guard.cond.63 = and i1 %guard.cond.62, %guard.cond.61
%guard.cond.64 = and i1 %guard.cond.63, %guard.cond.62
%guard.cond.65 = and i1 %guard.cond.64, %guard.cond.63
%guard.cond.66 = and i1 %guard.cond.65, %guard.cond.64
%guard.cond.67 = and i1 %guard.cond.66, %guard.cond.65
%guard.cond.68 = and i1 %guard.cond.67, %guard.cond.66
%guard.cond.69 = and i1 %guard.cond.68, %guard.cond.67
%guard.cond.70 = and i1 %guard.cond.69, %guard.cond.68
%guard.cond.71 = and i1 %guard.cond.70, %guard.cond.69
%guard.cond.72 = and i1 %guard.cond.71, %guard.cond.70
%guard.cond.73 = and i1 %guard.cond.72, %guard.cond.71
%guard.cond.74 = and i1 %guard.cond.73, %guard.cond.72
%guard.cond.75 = and i1 %guard.cond.74, %guard.cond.73
%guard.cond.76 = and i1 %guard.cond.75, %guard.cond.74
%guard.cond.77 = and i1 %guard.cond.76, %guard.cond.75
%guard.cond.78 = and i1 %guard.cond.77, %guard.cond.76
%guard.cond.79 = and i1 %guard.cond.78, %guard.cond.77
%guard.cond.80 = and i1 %guard.cond.79, %guard.cond.78
%guard.cond.81 = and i1 %guard.cond.80, %guard.cond.79
%guard.cond.82 = and i1 %guard.cond.81, %guard.cond.80
%guard.cond.83 = and i1 %guard.cond.82, %guard.cond.81
%guard.cond.84 = and i1 %guard.cond.83, %guard.cond.82
%guard.cond.85 = and i1 %guard.cond.84, %guard.cond.83
%guard.cond.86 = and i1 %guard.cond.85, %guard.cond.84
%guard.cond.87 = and i1 %guard.cond.86, %guard.cond.85
%guard.cond.88 = and i1 %guard.cond.87, %guard.cond.86
%guard.cond.89 = and i1 %guard.cond.88, %guard.cond.87
%guard.cond.90 = and i1 %guard.cond.89, %guard.cond.88
%guard.cond.91 = and i1 %guard.cond.90, %guard.cond.89
%guard.cond.92 = and i1 %guard.cond.91, %guard.cond.90
%guard.cond.93 = and i1 %guard.cond.92, %guard.cond.91
%guard.cond.94 = and i1 %guard.cond.93, %guard.cond.92
%guard.cond.95 = and i1 %guard.cond.94, %guard.cond.93
%guard.cond.96 = and i1 %guard.cond.95, %guard.cond.94
%guard.cond.97 = and i1 %guard.cond.96, %guard.cond.95
%guard.cond.98 = and i1 %guard.cond.97, %guard.cond.96
%guard.cond.99 = and i1 %guard.cond.98, %guard.cond.97
call void (i1, ...) @llvm.experimental.guard(i1 %guard.cond.99, i32 9) [ "deopt"() ]
%i.i64 = zext i32 %i to i64
%array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64
%array.i = load i32, i32* %array.i.ptr, align 4
%loop.acc.next = add i32 %loop.acc, %array.i
%i.next = add nuw i32 %i, 1
%continue = icmp ult i32 %i.next, %n
br i1 %continue, label %loop, label %exit
exit:
%result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ]
ret i32 %result
}
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