391 lines
18 KiB
LLVM
391 lines
18 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -S -loop-predication -loop-predication-enable-count-down-loop=true < %s 2>&1 | FileCheck %s
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; RUN: opt -S -passes='require<scalar-evolution>,loop(loop-predication)' -loop-predication-enable-count-down-loop=true < %s 2>&1 | FileCheck %s
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declare void @llvm.experimental.guard(i1, ...)
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define i32 @signed_reverse_loop_n_to_lower_limit(i32* %array, i32 %length, i32 %n, i32 %lowerlimit) {
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; CHECK-LABEL: @signed_reverse_loop_n_to_lower_limit(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[TMP5:%.*]] = icmp eq i32 [[N:%.*]], 0
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; CHECK-NEXT: br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]]
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; CHECK: loop.preheader:
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; CHECK-NEXT: [[TMP0:%.*]] = add i32 [[N]], -1
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; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i32 [[TMP0]], [[LENGTH:%.*]]
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; CHECK-NEXT: [[TMP2:%.*]] = icmp sge i32 [[LOWERLIMIT:%.*]], 1
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; CHECK-NEXT: [[TMP3:%.*]] = and i1 [[TMP1]], [[TMP2]]
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
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; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ [[N]], [[LOOP_PREHEADER]] ]
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; CHECK-NEXT: [[I_NEXT]] = add nsw i32 [[I]], -1
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; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[TMP3]], i32 9) [ "deopt"() ]
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; CHECK-NEXT: [[I_I64:%.*]] = zext i32 [[I_NEXT]] to i64
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; CHECK-NEXT: [[ARRAY_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY:%.*]], i64 [[I_I64]]
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; CHECK-NEXT: [[ARRAY_I:%.*]] = load i32, i32* [[ARRAY_I_PTR]], align 4
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; CHECK-NEXT: [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC]], [[ARRAY_I]]
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; CHECK-NEXT: [[CONTINUE:%.*]] = icmp sgt i32 [[I]], [[LOWERLIMIT]]
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; CHECK-NEXT: br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]]
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; CHECK: exit.loopexit:
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; CHECK-NEXT: [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ]
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; CHECK-NEXT: br label [[EXIT]]
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; CHECK: exit:
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; CHECK-NEXT: [[RESULT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_ACC_NEXT_LCSSA]], [[EXIT_LOOPEXIT]] ]
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; CHECK-NEXT: ret i32 [[RESULT]]
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;
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entry:
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%tmp5 = icmp eq i32 %n, 0
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br i1 %tmp5, label %exit, label %loop.preheader
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loop.preheader:
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br label %loop
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loop:
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%loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ]
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%i = phi i32 [ %i.next, %loop ], [ %n, %loop.preheader ]
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%i.next = add nsw i32 %i, -1
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%within.bounds = icmp ult i32 %i.next, %length
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call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ]
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%i.i64 = zext i32 %i.next to i64
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%array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64
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%array.i = load i32, i32* %array.i.ptr, align 4
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%loop.acc.next = add i32 %loop.acc, %array.i
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%continue = icmp sgt i32 %i, %lowerlimit
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br i1 %continue, label %loop, label %exit
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exit:
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%result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ]
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ret i32 %result
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}
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define i32 @unsigned_reverse_loop_n_to_lower_limit(i32* %array, i32 %length, i32 %n, i32 %lowerlimit) {
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; CHECK-LABEL: @unsigned_reverse_loop_n_to_lower_limit(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[TMP5:%.*]] = icmp eq i32 [[N:%.*]], 0
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; CHECK-NEXT: br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]]
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; CHECK: loop.preheader:
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; CHECK-NEXT: [[TMP0:%.*]] = add i32 [[N]], -1
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; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i32 [[TMP0]], [[LENGTH:%.*]]
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; CHECK-NEXT: [[TMP2:%.*]] = icmp uge i32 [[LOWERLIMIT:%.*]], 1
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; CHECK-NEXT: [[TMP3:%.*]] = and i1 [[TMP1]], [[TMP2]]
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
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; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ [[N]], [[LOOP_PREHEADER]] ]
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; CHECK-NEXT: [[I_NEXT]] = add nsw i32 [[I]], -1
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; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[TMP3]], i32 9) [ "deopt"() ]
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; CHECK-NEXT: [[I_I64:%.*]] = zext i32 [[I_NEXT]] to i64
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; CHECK-NEXT: [[ARRAY_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY:%.*]], i64 [[I_I64]]
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; CHECK-NEXT: [[ARRAY_I:%.*]] = load i32, i32* [[ARRAY_I_PTR]], align 4
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; CHECK-NEXT: [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC]], [[ARRAY_I]]
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; CHECK-NEXT: [[CONTINUE:%.*]] = icmp ugt i32 [[I]], [[LOWERLIMIT]]
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; CHECK-NEXT: br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]]
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; CHECK: exit.loopexit:
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; CHECK-NEXT: [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ]
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; CHECK-NEXT: br label [[EXIT]]
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; CHECK: exit:
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; CHECK-NEXT: [[RESULT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_ACC_NEXT_LCSSA]], [[EXIT_LOOPEXIT]] ]
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; CHECK-NEXT: ret i32 [[RESULT]]
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;
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entry:
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%tmp5 = icmp eq i32 %n, 0
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br i1 %tmp5, label %exit, label %loop.preheader
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loop.preheader:
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br label %loop
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loop:
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%loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ]
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%i = phi i32 [ %i.next, %loop ], [ %n, %loop.preheader ]
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%i.next = add nsw i32 %i, -1
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%within.bounds = icmp ult i32 %i.next, %length
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call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ]
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%i.i64 = zext i32 %i.next to i64
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%array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64
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%array.i = load i32, i32* %array.i.ptr, align 4
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%loop.acc.next = add i32 %loop.acc, %array.i
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%continue = icmp ugt i32 %i, %lowerlimit
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br i1 %continue, label %loop, label %exit
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exit:
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%result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ]
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ret i32 %result
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}
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; if we predicated the loop, the guard will definitely fail and we will
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; deoptimize early on.
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define i32 @unsigned_reverse_loop_n_to_0(i32* %array, i32 %length, i32 %n, i32 %lowerlimit) {
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; CHECK-LABEL: @unsigned_reverse_loop_n_to_0(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[TMP5:%.*]] = icmp eq i32 [[N:%.*]], 0
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; CHECK-NEXT: br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]]
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; CHECK: loop.preheader:
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; CHECK-NEXT: [[TMP0:%.*]] = add i32 [[N]], -1
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; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i32 [[TMP0]], [[LENGTH:%.*]]
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; CHECK-NEXT: [[TMP2:%.*]] = and i1 [[TMP1]], false
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
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; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ [[N]], [[LOOP_PREHEADER]] ]
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; CHECK-NEXT: [[I_NEXT]] = add nsw i32 [[I]], -1
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; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[TMP2]], i32 9) [ "deopt"() ]
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; CHECK-NEXT: [[I_I64:%.*]] = zext i32 [[I_NEXT]] to i64
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; CHECK-NEXT: [[ARRAY_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY:%.*]], i64 [[I_I64]]
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; CHECK-NEXT: [[ARRAY_I:%.*]] = load i32, i32* [[ARRAY_I_PTR]], align 4
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; CHECK-NEXT: [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC]], [[ARRAY_I]]
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; CHECK-NEXT: [[CONTINUE:%.*]] = icmp ugt i32 [[I]], 0
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; CHECK-NEXT: br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]]
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; CHECK: exit.loopexit:
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; CHECK-NEXT: [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ]
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; CHECK-NEXT: br label [[EXIT]]
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; CHECK: exit:
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; CHECK-NEXT: [[RESULT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_ACC_NEXT_LCSSA]], [[EXIT_LOOPEXIT]] ]
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; CHECK-NEXT: ret i32 [[RESULT]]
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;
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entry:
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%tmp5 = icmp eq i32 %n, 0
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br i1 %tmp5, label %exit, label %loop.preheader
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loop.preheader:
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br label %loop
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loop:
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%loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ]
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%i = phi i32 [ %i.next, %loop ], [ %n, %loop.preheader ]
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%i.next = add nsw i32 %i, -1
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%within.bounds = icmp ult i32 %i.next, %length
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call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ]
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%i.i64 = zext i32 %i.next to i64
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%array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64
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%array.i = load i32, i32* %array.i.ptr, align 4
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%loop.acc.next = add i32 %loop.acc, %array.i
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%continue = icmp ugt i32 %i, 0
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br i1 %continue, label %loop, label %exit
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exit:
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%result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ]
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ret i32 %result
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}
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; do not loop predicate when the range has step -1 and latch has step 1.
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define i32 @reverse_loop_range_step_increment(i32 %n, i32* %array, i32 %length) {
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; CHECK-LABEL: @reverse_loop_range_step_increment(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[TMP5:%.*]] = icmp eq i32 [[N:%.*]], 0
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; CHECK-NEXT: br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]]
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; CHECK: loop.preheader:
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
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; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ [[N]], [[LOOP_PREHEADER]] ]
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; CHECK-NEXT: [[IRC:%.*]] = phi i32 [ [[I_INC:%.*]], [[LOOP]] ], [ 1, [[LOOP_PREHEADER]] ]
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; CHECK-NEXT: [[I_INC]] = add nuw nsw i32 [[IRC]], 1
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; CHECK-NEXT: [[WITHIN_BOUNDS:%.*]] = icmp ult i32 [[IRC]], [[LENGTH:%.*]]
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; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[WITHIN_BOUNDS]], i32 9) [ "deopt"() ]
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; CHECK-NEXT: [[I_I64:%.*]] = zext i32 [[IRC]] to i64
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; CHECK-NEXT: [[ARRAY_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY:%.*]], i64 [[I_I64]]
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; CHECK-NEXT: [[ARRAY_I:%.*]] = load i32, i32* [[ARRAY_I_PTR]], align 4
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; CHECK-NEXT: [[I_NEXT]] = add nsw i32 [[I]], -1
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; CHECK-NEXT: [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC]], [[ARRAY_I]]
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; CHECK-NEXT: [[CONTINUE:%.*]] = icmp ugt i32 [[I]], 65534
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; CHECK-NEXT: br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]]
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; CHECK: exit.loopexit:
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; CHECK-NEXT: [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ]
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; CHECK-NEXT: br label [[EXIT]]
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; CHECK: exit:
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; CHECK-NEXT: [[RESULT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_ACC_NEXT_LCSSA]], [[EXIT_LOOPEXIT]] ]
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; CHECK-NEXT: ret i32 [[RESULT]]
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;
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entry:
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%tmp5 = icmp eq i32 %n, 0
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br i1 %tmp5, label %exit, label %loop.preheader
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loop.preheader:
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br label %loop
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loop:
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%loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ]
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%i = phi i32 [ %i.next, %loop ], [ %n, %loop.preheader ]
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%irc = phi i32 [ %i.inc, %loop ], [ 1, %loop.preheader ]
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%i.inc = add nuw nsw i32 %irc, 1
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%within.bounds = icmp ult i32 %irc, %length
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call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ]
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%i.i64 = zext i32 %irc to i64
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%array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64
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%array.i = load i32, i32* %array.i.ptr, align 4
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%i.next = add nsw i32 %i, -1
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%loop.acc.next = add i32 %loop.acc, %array.i
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%continue = icmp ugt i32 %i, 65534
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br i1 %continue, label %loop, label %exit
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exit:
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%result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ]
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ret i32 %result
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}
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define i32 @signed_reverse_loop_n_to_lower_limit_equal(i32* %array, i32 %length, i32 %n, i32 %lowerlimit) {
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; CHECK-LABEL: @signed_reverse_loop_n_to_lower_limit_equal(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[TMP5:%.*]] = icmp eq i32 [[N:%.*]], 0
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; CHECK-NEXT: br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]]
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; CHECK: loop.preheader:
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; CHECK-NEXT: [[TMP0:%.*]] = add i32 [[N]], -1
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; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i32 [[TMP0]], [[LENGTH:%.*]]
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; CHECK-NEXT: [[TMP2:%.*]] = icmp sgt i32 [[LOWERLIMIT:%.*]], 1
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; CHECK-NEXT: [[TMP3:%.*]] = and i1 [[TMP1]], [[TMP2]]
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
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; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ [[N]], [[LOOP_PREHEADER]] ]
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; CHECK-NEXT: [[I_NEXT]] = add nsw i32 [[I]], -1
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; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[TMP3]], i32 9) [ "deopt"() ]
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; CHECK-NEXT: [[I_I64:%.*]] = zext i32 [[I_NEXT]] to i64
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; CHECK-NEXT: [[ARRAY_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY:%.*]], i64 [[I_I64]]
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; CHECK-NEXT: [[ARRAY_I:%.*]] = load i32, i32* [[ARRAY_I_PTR]], align 4
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; CHECK-NEXT: [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC]], [[ARRAY_I]]
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; CHECK-NEXT: [[CONTINUE:%.*]] = icmp sge i32 [[I]], [[LOWERLIMIT]]
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; CHECK-NEXT: br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]]
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; CHECK: exit.loopexit:
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; CHECK-NEXT: [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ]
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; CHECK-NEXT: br label [[EXIT]]
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; CHECK: exit:
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; CHECK-NEXT: [[RESULT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_ACC_NEXT_LCSSA]], [[EXIT_LOOPEXIT]] ]
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; CHECK-NEXT: ret i32 [[RESULT]]
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;
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entry:
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%tmp5 = icmp eq i32 %n, 0
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br i1 %tmp5, label %exit, label %loop.preheader
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loop.preheader:
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br label %loop
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loop:
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%loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ]
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%i = phi i32 [ %i.next, %loop ], [ %n, %loop.preheader ]
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%i.next = add nsw i32 %i, -1
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%within.bounds = icmp ult i32 %i.next, %length
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call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ]
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%i.i64 = zext i32 %i.next to i64
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%array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64
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%array.i = load i32, i32* %array.i.ptr, align 4
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%loop.acc.next = add i32 %loop.acc, %array.i
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%continue = icmp sge i32 %i, %lowerlimit
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br i1 %continue, label %loop, label %exit
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exit:
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%result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ]
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ret i32 %result
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}
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define i32 @unsigned_reverse_loop_n_to_lower_limit_equal(i32* %array, i32 %length, i32 %n, i32 %lowerlimit) {
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; CHECK-LABEL: @unsigned_reverse_loop_n_to_lower_limit_equal(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[TMP5:%.*]] = icmp eq i32 [[N:%.*]], 0
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; CHECK-NEXT: br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]]
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; CHECK: loop.preheader:
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; CHECK-NEXT: [[TMP0:%.*]] = add i32 [[N]], -1
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; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i32 [[TMP0]], [[LENGTH:%.*]]
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; CHECK-NEXT: [[TMP2:%.*]] = icmp ugt i32 [[LOWERLIMIT:%.*]], 1
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; CHECK-NEXT: [[TMP3:%.*]] = and i1 [[TMP1]], [[TMP2]]
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ]
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; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ [[N]], [[LOOP_PREHEADER]] ]
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; CHECK-NEXT: [[I_NEXT]] = add nsw i32 [[I]], -1
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; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[TMP3]], i32 9) [ "deopt"() ]
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; CHECK-NEXT: [[I_I64:%.*]] = zext i32 [[I_NEXT]] to i64
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; CHECK-NEXT: [[ARRAY_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY:%.*]], i64 [[I_I64]]
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; CHECK-NEXT: [[ARRAY_I:%.*]] = load i32, i32* [[ARRAY_I_PTR]], align 4
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; CHECK-NEXT: [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC]], [[ARRAY_I]]
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; CHECK-NEXT: [[CONTINUE:%.*]] = icmp uge i32 [[I]], [[LOWERLIMIT]]
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; CHECK-NEXT: br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]]
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; CHECK: exit.loopexit:
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; CHECK-NEXT: [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ]
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|
; 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 ], [ %n, %loop.preheader ]
|
|
%i.next = add nsw i32 %i, -1
|
|
%within.bounds = icmp ult i32 %i.next, %length
|
|
call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ]
|
|
%i.i64 = zext i32 %i.next 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
|
|
%continue = icmp uge i32 %i, %lowerlimit
|
|
br i1 %continue, label %loop, label %exit
|
|
|
|
exit:
|
|
%result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ]
|
|
ret i32 %result
|
|
}
|
|
|
|
|
|
; if we predicated the loop, the guard will definitely fail and we will
|
|
; deoptimize early on.
|
|
define i32 @unsigned_reverse_loop_n_to_1(i32* %array, i32 %length, i32 %n, i32 %lowerlimit) {
|
|
; CHECK-LABEL: @unsigned_reverse_loop_n_to_1(
|
|
; 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:%.*]] = add i32 [[N]], -1
|
|
; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i32 [[TMP0]], [[LENGTH:%.*]]
|
|
; CHECK-NEXT: [[TMP2:%.*]] = and i1 [[TMP1]], false
|
|
; 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]] ], [ [[N]], [[LOOP_PREHEADER]] ]
|
|
; CHECK-NEXT: [[I_NEXT]] = add nsw i32 [[I]], -1
|
|
; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[TMP2]], i32 9) [ "deopt"() ]
|
|
; CHECK-NEXT: [[I_I64:%.*]] = zext i32 [[I_NEXT]] 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: [[CONTINUE:%.*]] = icmp uge i32 [[I]], 1
|
|
; 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 ], [ %n, %loop.preheader ]
|
|
%i.next = add nsw i32 %i, -1
|
|
%within.bounds = icmp ult i32 %i.next, %length
|
|
call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ]
|
|
%i.i64 = zext i32 %i.next 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
|
|
%continue = icmp uge i32 %i, 1
|
|
br i1 %continue, label %loop, label %exit
|
|
|
|
exit:
|
|
%result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ]
|
|
ret i32 %result
|
|
}
|
|
|