forked from OSchip/llvm-project
572 lines
19 KiB
LLVM
572 lines
19 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -indvars -S < %s | FileCheck %s
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; RUN: opt -passes=indvars -S < %s | FileCheck %s
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; TODO: should be able to remove the range check basing on the following facts:
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; 0 <= len <= MAX_INT [1];
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; iv starts from len and goes down stopping at zero and [1], therefore
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; 0 <= iv <= len [2];
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; 3. In range_check_block, iv != 0 and [2], therefore
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; 1 <= iv <= len [3];
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; 4. iv.next = iv - 1 and [3], therefore
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; 0 <= iv.next < len.
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define void @test_predicated_simple_unsigned(i32* %p, i32* %arr) {
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; CHECK-LABEL: @test_predicated_simple_unsigned(
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; CHECK-NEXT: preheader:
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; CHECK-NEXT: [[LEN:%.*]] = load i32, i32* [[P:%.*]], align 4, [[RNG0:!range !.*]]
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: [[IV:%.*]] = phi i32 [ [[LEN]], [[PREHEADER:%.*]] ], [ [[IV_NEXT:%.*]], [[BACKEDGE:%.*]] ]
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; CHECK-NEXT: [[ZERO_COND:%.*]] = icmp eq i32 [[IV]], 0
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; CHECK-NEXT: br i1 [[ZERO_COND]], label [[EXIT:%.*]], label [[RANGE_CHECK_BLOCK:%.*]]
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; CHECK: range_check_block:
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; CHECK-NEXT: [[IV_NEXT]] = sub i32 [[IV]], 1
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; CHECK-NEXT: [[RANGE_CHECK:%.*]] = icmp ult i32 [[IV_NEXT]], [[LEN]]
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; CHECK-NEXT: br i1 [[RANGE_CHECK]], label [[BACKEDGE]], label [[FAIL:%.*]]
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; CHECK: backedge:
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; CHECK-NEXT: [[EL_PTR:%.*]] = getelementptr i32, i32* [[P]], i32 [[IV]]
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; CHECK-NEXT: [[EL:%.*]] = load i32, i32* [[EL_PTR]], align 4
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; CHECK-NEXT: [[LOOP_COND:%.*]] = icmp eq i32 [[EL]], 0
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; CHECK-NEXT: br i1 [[LOOP_COND]], label [[LOOP]], label [[EXIT]]
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; CHECK: exit:
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; CHECK-NEXT: ret void
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; CHECK: fail:
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; CHECK-NEXT: unreachable
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;
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preheader:
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%len = load i32, i32* %p, !range !0
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br label %loop
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loop:
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%iv = phi i32 [%len, %preheader], [%iv.next, %backedge]
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%zero_cond = icmp eq i32 %iv, 0
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br i1 %zero_cond, label %exit, label %range_check_block
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range_check_block:
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%iv.next = sub i32 %iv, 1
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%range_check = icmp ult i32 %iv.next, %len
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br i1 %range_check, label %backedge, label %fail
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backedge:
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%el.ptr = getelementptr i32, i32* %p, i32 %iv
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%el = load i32, i32* %el.ptr
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%loop.cond = icmp eq i32 %el, 0
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br i1 %loop.cond, label %loop, label %exit
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exit:
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ret void
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fail:
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unreachable
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}
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define void @test_predicated_simple_signed(i32* %p, i32* %arr) {
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; CHECK-LABEL: @test_predicated_simple_signed(
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; CHECK-NEXT: preheader:
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; CHECK-NEXT: [[LEN:%.*]] = load i32, i32* [[P:%.*]], align 4, [[RNG0]]
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: [[IV:%.*]] = phi i32 [ [[LEN]], [[PREHEADER:%.*]] ], [ [[IV_NEXT:%.*]], [[BACKEDGE:%.*]] ]
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; CHECK-NEXT: [[ZERO_COND:%.*]] = icmp eq i32 [[IV]], 0
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; CHECK-NEXT: br i1 [[ZERO_COND]], label [[EXIT:%.*]], label [[RANGE_CHECK_BLOCK:%.*]]
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; CHECK: range_check_block:
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; CHECK-NEXT: [[IV_NEXT]] = sub i32 [[IV]], 1
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; CHECK-NEXT: [[RANGE_CHECK:%.*]] = icmp slt i32 [[IV_NEXT]], [[LEN]]
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; CHECK-NEXT: br i1 [[RANGE_CHECK]], label [[BACKEDGE]], label [[FAIL:%.*]]
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; CHECK: backedge:
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; CHECK-NEXT: [[EL_PTR:%.*]] = getelementptr i32, i32* [[P]], i32 [[IV]]
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; CHECK-NEXT: [[EL:%.*]] = load i32, i32* [[EL_PTR]], align 4
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; CHECK-NEXT: [[LOOP_COND:%.*]] = icmp eq i32 [[EL]], 0
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; CHECK-NEXT: br i1 [[LOOP_COND]], label [[LOOP]], label [[EXIT]]
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; CHECK: exit:
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; CHECK-NEXT: ret void
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; CHECK: fail:
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; CHECK-NEXT: unreachable
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;
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preheader:
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%len = load i32, i32* %p, !range !0
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br label %loop
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loop:
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%iv = phi i32 [%len, %preheader], [%iv.next, %backedge]
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%zero_cond = icmp eq i32 %iv, 0
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br i1 %zero_cond, label %exit, label %range_check_block
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range_check_block:
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%iv.next = sub i32 %iv, 1
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%range_check = icmp slt i32 %iv.next, %len
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br i1 %range_check, label %backedge, label %fail
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backedge:
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%el.ptr = getelementptr i32, i32* %p, i32 %iv
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%el = load i32, i32* %el.ptr
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%loop.cond = icmp eq i32 %el, 0
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br i1 %loop.cond, label %loop, label %exit
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exit:
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ret void
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fail:
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unreachable
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}
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; Cannot remove checks because the range check fails on the last iteration.
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define void @predicated_outside_loop_signed_neg(i32 %arg) nounwind #0 {
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; CHECK-LABEL: @predicated_outside_loop_signed_neg(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[SUB1:%.*]] = sub nsw i32 [[ARG:%.*]], 1
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; CHECK-NEXT: [[CMP1:%.*]] = icmp slt i32 0, [[SUB1]]
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; CHECK-NEXT: br i1 [[CMP1]], label [[OUTER_PREHEADER:%.*]], label [[EXIT:%.*]]
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; CHECK: outer.preheader:
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; CHECK-NEXT: br label [[OUTER:%.*]]
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; CHECK: outer:
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; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[I_INC:%.*]], [[OUTER_INC:%.*]] ], [ 0, [[OUTER_PREHEADER]] ]
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; CHECK-NEXT: [[SUB2:%.*]] = sub nsw i32 [[ARG]], [[I]]
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; CHECK-NEXT: [[SUB3:%.*]] = sub nsw i32 [[SUB2]], 1
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; CHECK-NEXT: [[CMP2:%.*]] = icmp slt i32 0, [[SUB3]]
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; CHECK-NEXT: br i1 [[CMP2]], label [[INNER_PH:%.*]], label [[OUTER_INC]]
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; CHECK: inner.ph:
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; CHECK-NEXT: br label [[INNER:%.*]]
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; CHECK: inner:
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; CHECK-NEXT: br i1 false, label [[INNER]], label [[OUTER_INC_LOOPEXIT:%.*]]
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; CHECK: outer.inc.loopexit:
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; CHECK-NEXT: br label [[OUTER_INC]]
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; CHECK: outer.inc:
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; CHECK-NEXT: [[I_INC]] = add nuw nsw i32 [[I]], 1
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; CHECK-NEXT: br i1 false, label [[OUTER]], label [[EXIT_LOOPEXIT:%.*]]
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; CHECK: exit.loopexit:
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; CHECK-NEXT: br label [[EXIT]]
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; CHECK: exit:
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; CHECK-NEXT: ret void
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;
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entry:
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%sub1 = sub nsw i32 %arg, 1
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%cmp1 = icmp slt i32 0, %sub1
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br i1 %cmp1, label %outer, label %exit
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outer:
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%i = phi i32 [ 0, %entry ], [ %i.inc, %outer.inc ]
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%sub2 = sub nsw i32 %arg, %i
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%sub3 = sub nsw i32 %sub2, 1
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%cmp2 = icmp slt i32 0, %sub3
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br i1 %cmp2, label %inner.ph, label %outer.inc
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inner.ph:
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br label %inner
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inner:
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%j = phi i32 [ 0, %inner.ph ], [ %j.inc, %inner ]
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%j.inc = add nsw i32 %j, 1
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%cmp3 = icmp slt i32 %j.inc, %sub3
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br i1 %cmp3, label %inner, label %outer.inc
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outer.inc:
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%i.inc = add nsw i32 %i, 1
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%cmp4 = icmp slt i32 %i.inc, %arg
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br i1 %cmp4, label %outer, label %exit
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exit:
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ret void
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}
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; Range check can be removed.
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define void @predicated_outside_loop_signed_pos(i32 %arg) nounwind #0 {
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; CHECK-LABEL: @predicated_outside_loop_signed_pos(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[SUB1:%.*]] = sub nsw i32 [[ARG:%.*]], 1
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; CHECK-NEXT: [[CMP1:%.*]] = icmp slt i32 0, [[SUB1]]
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; CHECK-NEXT: br i1 [[CMP1]], label [[OUTER_PREHEADER:%.*]], label [[EXIT:%.*]]
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; CHECK: outer.preheader:
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; CHECK-NEXT: br label [[OUTER:%.*]]
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; CHECK: outer:
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; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[I_INC:%.*]], [[OUTER_INC:%.*]] ], [ 0, [[OUTER_PREHEADER]] ]
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; CHECK-NEXT: [[SUB2:%.*]] = sub nsw i32 [[ARG]], [[I]]
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; CHECK-NEXT: [[SUB3:%.*]] = sub nsw i32 [[SUB2]], 1
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; CHECK-NEXT: [[CMP2:%.*]] = icmp slt i32 0, [[SUB3]]
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; CHECK-NEXT: br i1 [[CMP2]], label [[INNER_PH:%.*]], label [[OUTER_INC]]
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; CHECK: inner.ph:
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; CHECK-NEXT: br label [[INNER:%.*]]
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; CHECK: inner:
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; CHECK-NEXT: br i1 false, label [[INNER]], label [[OUTER_INC_LOOPEXIT:%.*]]
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; CHECK: outer.inc.loopexit:
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; CHECK-NEXT: br label [[OUTER_INC]]
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; CHECK: outer.inc:
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; CHECK-NEXT: [[I_INC]] = add nuw nsw i32 [[I]], 1
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; CHECK-NEXT: br i1 false, label [[OUTER]], label [[EXIT_LOOPEXIT:%.*]]
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; CHECK: exit.loopexit:
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; CHECK-NEXT: br label [[EXIT]]
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; CHECK: exit:
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; CHECK-NEXT: ret void
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;
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entry:
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%sub1 = sub nsw i32 %arg, 1
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%cmp1 = icmp slt i32 0, %sub1
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br i1 %cmp1, label %outer, label %exit
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outer:
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%i = phi i32 [ 0, %entry ], [ %i.inc, %outer.inc ]
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%sub2 = sub nsw i32 %arg, %i
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%sub3 = sub nsw i32 %sub2, 1
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%cmp2 = icmp slt i32 0, %sub3
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br i1 %cmp2, label %inner.ph, label %outer.inc
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inner.ph:
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br label %inner
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inner:
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%j = phi i32 [ 0, %inner.ph ], [ %j.inc, %inner ]
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%j.inc = add nsw i32 %j, 1
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%cmp3 = icmp slt i32 %j.inc, %sub3
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br i1 %cmp3, label %inner, label %outer.inc
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outer.inc:
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%i.inc = add nsw i32 %i, 1
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%cmp4 = icmp slt i32 %i.inc, %sub1
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br i1 %cmp4, label %outer, label %exit
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exit:
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ret void
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}
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define void @predicated_outside_loop_unsigned(i32 %arg) nounwind #0 {
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; CHECK-LABEL: @predicated_outside_loop_unsigned(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[SUB1:%.*]] = sub nsw i32 [[ARG:%.*]], 1
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; CHECK-NEXT: [[CMP1:%.*]] = icmp slt i32 0, [[SUB1]]
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; CHECK-NEXT: br i1 [[CMP1]], label [[OUTER_PREHEADER:%.*]], label [[EXIT:%.*]]
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; CHECK: outer.preheader:
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; CHECK-NEXT: br label [[OUTER:%.*]]
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; CHECK: outer:
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; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[I_INC:%.*]], [[OUTER_INC:%.*]] ], [ 0, [[OUTER_PREHEADER]] ]
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; CHECK-NEXT: [[SUB2:%.*]] = sub nsw i32 [[ARG]], [[I]]
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; CHECK-NEXT: [[SUB3:%.*]] = sub nsw i32 [[SUB2]], 1
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; CHECK-NEXT: [[CMP2:%.*]] = icmp ult i32 0, [[SUB3]]
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; CHECK-NEXT: br i1 [[CMP2]], label [[INNER_PH:%.*]], label [[OUTER_INC]]
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; CHECK: inner.ph:
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; CHECK-NEXT: br label [[INNER:%.*]]
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; CHECK: inner:
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; CHECK-NEXT: br i1 false, label [[INNER]], label [[OUTER_INC_LOOPEXIT:%.*]]
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; CHECK: outer.inc.loopexit:
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; CHECK-NEXT: br label [[OUTER_INC]]
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; CHECK: outer.inc:
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; CHECK-NEXT: [[I_INC]] = add nuw nsw i32 [[I]], 1
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; CHECK-NEXT: br i1 false, label [[OUTER]], label [[EXIT_LOOPEXIT:%.*]]
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; CHECK: exit.loopexit:
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; CHECK-NEXT: br label [[EXIT]]
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; CHECK: exit:
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; CHECK-NEXT: ret void
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;
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entry:
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%sub1 = sub nsw i32 %arg, 1
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%cmp1 = icmp slt i32 0, %sub1
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br i1 %cmp1, label %outer, label %exit
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outer:
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%i = phi i32 [ 0, %entry ], [ %i.inc, %outer.inc ]
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%sub2 = sub nsw i32 %arg, %i
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%sub3 = sub nsw i32 %sub2, 1
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%cmp2 = icmp ult i32 0, %sub3
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br i1 %cmp2, label %inner.ph, label %outer.inc
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inner.ph:
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br label %inner
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inner:
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%j = phi i32 [ 0, %inner.ph ], [ %j.inc, %inner ]
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%j.inc = add nsw i32 %j, 1
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%cmp3 = icmp slt i32 %j.inc, %sub3
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br i1 %cmp3, label %inner, label %outer.inc
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outer.inc:
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%i.inc = add nsw i32 %i, 1
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%cmp4 = icmp slt i32 %i.inc, %arg
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br i1 %cmp4, label %outer, label %exit
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exit:
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ret void
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}
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; Cannot remove checks because the range check fails on the last iteration.
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define void @predicated_inside_loop_signed_neg(i32 %arg) nounwind #0 {
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; CHECK-LABEL: @predicated_inside_loop_signed_neg(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label [[OUTER:%.*]]
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; CHECK: outer:
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; CHECK-NEXT: [[I:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[I_INC:%.*]], [[OUTER_INC:%.*]] ]
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; CHECK-NEXT: [[SUB1:%.*]] = sub nsw i32 [[ARG:%.*]], 1
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; CHECK-NEXT: [[CMP1:%.*]] = icmp slt i32 0, [[SUB1]]
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; CHECK-NEXT: br i1 [[CMP1]], label [[GUARDED:%.*]], label [[EXIT:%.*]]
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; CHECK: guarded:
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; CHECK-NEXT: [[SUB2:%.*]] = sub nsw i32 [[ARG]], [[I]]
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; CHECK-NEXT: [[SUB3:%.*]] = sub nsw i32 [[SUB2]], 1
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; CHECK-NEXT: [[CMP2:%.*]] = icmp slt i32 0, [[SUB3]]
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; CHECK-NEXT: br i1 [[CMP2]], label [[INNER_PH:%.*]], label [[OUTER_INC]]
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; CHECK: inner.ph:
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; CHECK-NEXT: br label [[INNER:%.*]]
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; CHECK: inner:
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; CHECK-NEXT: br i1 false, label [[INNER]], label [[OUTER_INC_LOOPEXIT:%.*]]
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; CHECK: outer.inc.loopexit:
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; CHECK-NEXT: br label [[OUTER_INC]]
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; CHECK: outer.inc:
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; CHECK-NEXT: [[I_INC]] = add nuw nsw i32 [[I]], 1
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; CHECK-NEXT: [[CMP4:%.*]] = icmp slt i32 [[I_INC]], [[ARG]]
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; CHECK-NEXT: br i1 [[CMP4]], label [[OUTER]], label [[EXIT]]
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; CHECK: exit:
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; CHECK-NEXT: ret void
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;
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entry:
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br label %outer
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outer:
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%i = phi i32 [ 0, %entry ], [ %i.inc, %outer.inc ]
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%sub1 = sub nsw i32 %arg, 1
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%cmp1 = icmp slt i32 0, %sub1
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br i1 %cmp1, label %guarded, label %exit
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guarded:
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%sub2 = sub nsw i32 %arg, %i
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%sub3 = sub nsw i32 %sub2, 1
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%cmp2 = icmp slt i32 0, %sub3
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br i1 %cmp2, label %inner.ph, label %outer.inc
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inner.ph:
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br label %inner
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inner:
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%j = phi i32 [ 0, %inner.ph ], [ %j.inc, %inner ]
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%j.inc = add nsw i32 %j, 1
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%cmp3 = icmp slt i32 %j.inc, %sub3
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br i1 %cmp3, label %inner, label %outer.inc
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outer.inc:
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%i.inc = add nsw i32 %i, 1
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%cmp4 = icmp slt i32 %i.inc, %arg
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br i1 %cmp4, label %outer, label %exit
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exit:
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ret void
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}
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; Range check can be trivially removed.
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define void @predicated_inside_loop_signed_pos(i32 %arg) nounwind #0 {
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; CHECK-LABEL: @predicated_inside_loop_signed_pos(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label [[OUTER:%.*]]
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; CHECK: outer:
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; CHECK-NEXT: [[I:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[I_INC:%.*]], [[OUTER_INC:%.*]] ]
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; CHECK-NEXT: [[SUB1:%.*]] = sub nsw i32 [[ARG:%.*]], 1
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; CHECK-NEXT: [[CMP1:%.*]] = icmp slt i32 0, [[SUB1]]
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; CHECK-NEXT: br i1 [[CMP1]], label [[GUARDED:%.*]], label [[EXIT:%.*]]
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; CHECK: guarded:
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; CHECK-NEXT: [[SUB2:%.*]] = sub nsw i32 [[ARG]], [[I]]
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; CHECK-NEXT: [[SUB3:%.*]] = sub nsw i32 [[SUB2]], 1
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; CHECK-NEXT: [[CMP2:%.*]] = icmp slt i32 0, [[SUB3]]
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; CHECK-NEXT: br i1 [[CMP2]], label [[INNER_PH:%.*]], label [[OUTER_INC]]
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; CHECK: inner.ph:
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; CHECK-NEXT: br label [[INNER:%.*]]
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; CHECK: inner:
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; CHECK-NEXT: br i1 false, label [[INNER]], label [[OUTER_INC_LOOPEXIT:%.*]]
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; CHECK: outer.inc.loopexit:
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; CHECK-NEXT: br label [[OUTER_INC]]
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; CHECK: outer.inc:
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; CHECK-NEXT: [[I_INC]] = add nuw nsw i32 [[I]], 1
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; CHECK-NEXT: [[CMP4:%.*]] = icmp slt i32 [[I_INC]], [[SUB1]]
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; CHECK-NEXT: br i1 [[CMP4]], label [[OUTER]], label [[EXIT]]
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; CHECK: exit:
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; CHECK-NEXT: ret void
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;
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entry:
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br label %outer
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outer:
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%i = phi i32 [ 0, %entry ], [ %i.inc, %outer.inc ]
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%sub1 = sub nsw i32 %arg, 1
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%cmp1 = icmp slt i32 0, %sub1
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br i1 %cmp1, label %guarded, label %exit
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guarded:
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%sub2 = sub nsw i32 %arg, %i
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%sub3 = sub nsw i32 %sub2, 1
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%cmp2 = icmp slt i32 0, %sub3
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br i1 %cmp2, label %inner.ph, label %outer.inc
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inner.ph:
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br label %inner
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inner:
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%j = phi i32 [ 0, %inner.ph ], [ %j.inc, %inner ]
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%j.inc = add nsw i32 %j, 1
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%cmp3 = icmp slt i32 %j.inc, %sub3
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br i1 %cmp3, label %inner, label %outer.inc
|
|
|
|
outer.inc:
|
|
%i.inc = add nsw i32 %i, 1
|
|
%cmp4 = icmp slt i32 %i.inc, %sub1
|
|
br i1 %cmp4, label %outer, label %exit
|
|
|
|
exit:
|
|
ret void
|
|
}
|
|
|
|
define void @predicated_inside_loop_unsigned(i32 %arg) nounwind #0 {
|
|
; CHECK-LABEL: @predicated_inside_loop_unsigned(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: br label [[OUTER:%.*]]
|
|
; CHECK: outer:
|
|
; CHECK-NEXT: [[I:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[I_INC:%.*]], [[OUTER_INC:%.*]] ]
|
|
; CHECK-NEXT: [[SUB1:%.*]] = sub nsw i32 [[ARG:%.*]], 1
|
|
; CHECK-NEXT: [[CMP1:%.*]] = icmp slt i32 0, [[SUB1]]
|
|
; CHECK-NEXT: br i1 [[CMP1]], label [[GUARDED:%.*]], label [[EXIT:%.*]]
|
|
; CHECK: guarded:
|
|
; CHECK-NEXT: [[SUB2:%.*]] = sub nsw i32 [[ARG]], [[I]]
|
|
; CHECK-NEXT: [[SUB3:%.*]] = sub nsw i32 [[SUB2]], 1
|
|
; CHECK-NEXT: [[CMP2:%.*]] = icmp ult i32 0, [[SUB3]]
|
|
; CHECK-NEXT: br i1 [[CMP2]], label [[INNER_PH:%.*]], label [[OUTER_INC]]
|
|
; CHECK: inner.ph:
|
|
; CHECK-NEXT: br label [[INNER:%.*]]
|
|
; CHECK: inner:
|
|
; CHECK-NEXT: br i1 false, label [[INNER]], label [[OUTER_INC_LOOPEXIT:%.*]]
|
|
; CHECK: outer.inc.loopexit:
|
|
; CHECK-NEXT: br label [[OUTER_INC]]
|
|
; CHECK: outer.inc:
|
|
; CHECK-NEXT: [[I_INC]] = add nuw nsw i32 [[I]], 1
|
|
; CHECK-NEXT: [[CMP4:%.*]] = icmp slt i32 [[I_INC]], [[ARG]]
|
|
; CHECK-NEXT: br i1 [[CMP4]], label [[OUTER]], label [[EXIT]]
|
|
; CHECK: exit:
|
|
; CHECK-NEXT: ret void
|
|
;
|
|
entry:
|
|
br label %outer
|
|
|
|
outer:
|
|
%i = phi i32 [ 0, %entry ], [ %i.inc, %outer.inc ]
|
|
%sub1 = sub nsw i32 %arg, 1
|
|
%cmp1 = icmp slt i32 0, %sub1
|
|
br i1 %cmp1, label %guarded, label %exit
|
|
|
|
guarded:
|
|
%sub2 = sub nsw i32 %arg, %i
|
|
%sub3 = sub nsw i32 %sub2, 1
|
|
%cmp2 = icmp ult i32 0, %sub3
|
|
br i1 %cmp2, label %inner.ph, label %outer.inc
|
|
|
|
inner.ph:
|
|
br label %inner
|
|
|
|
inner:
|
|
%j = phi i32 [ 0, %inner.ph ], [ %j.inc, %inner ]
|
|
%j.inc = add nsw i32 %j, 1
|
|
%cmp3 = icmp slt i32 %j.inc, %sub3
|
|
br i1 %cmp3, label %inner, label %outer.inc
|
|
|
|
outer.inc:
|
|
%i.inc = add nsw i32 %i, 1
|
|
%cmp4 = icmp slt i32 %i.inc, %arg
|
|
br i1 %cmp4, label %outer, label %exit
|
|
|
|
exit:
|
|
ret void
|
|
}
|
|
|
|
define void @test_can_predicate_simple_unsigned(i32* %p, i32* %arr) {
|
|
; CHECK-LABEL: @test_can_predicate_simple_unsigned(
|
|
; CHECK-NEXT: preheader:
|
|
; CHECK-NEXT: [[LEN:%.*]] = load i32, i32* [[P:%.*]], align 4
|
|
; CHECK-NEXT: br label [[LOOP:%.*]]
|
|
; CHECK: loop:
|
|
; CHECK-NEXT: [[IV:%.*]] = phi i32 [ [[LEN]], [[PREHEADER:%.*]] ], [ [[IV_NEXT:%.*]], [[BACKEDGE:%.*]] ]
|
|
; CHECK-NEXT: [[ZERO_COND:%.*]] = icmp eq i32 [[IV]], 0
|
|
; CHECK-NEXT: br i1 [[ZERO_COND]], label [[EXIT:%.*]], label [[RANGE_CHECK_BLOCK:%.*]]
|
|
; CHECK: range_check_block:
|
|
; CHECK-NEXT: [[IV_NEXT]] = sub i32 [[IV]], 1
|
|
; CHECK-NEXT: [[RANGE_CHECK:%.*]] = icmp ult i32 [[IV_NEXT]], [[LEN]]
|
|
; CHECK-NEXT: br i1 [[RANGE_CHECK]], label [[BACKEDGE]], label [[FAIL:%.*]]
|
|
; CHECK: backedge:
|
|
; CHECK-NEXT: [[EL_PTR:%.*]] = getelementptr i32, i32* [[P]], i32 [[IV]]
|
|
; CHECK-NEXT: [[EL:%.*]] = load i32, i32* [[EL_PTR]], align 4
|
|
; CHECK-NEXT: [[LOOP_COND:%.*]] = icmp eq i32 [[EL]], 0
|
|
; CHECK-NEXT: br i1 [[LOOP_COND]], label [[LOOP]], label [[EXIT]]
|
|
; CHECK: exit:
|
|
; CHECK-NEXT: ret void
|
|
; CHECK: fail:
|
|
; CHECK-NEXT: unreachable
|
|
;
|
|
preheader:
|
|
%len = load i32, i32* %p
|
|
br label %loop
|
|
|
|
loop:
|
|
%iv = phi i32 [%len, %preheader], [%iv.next, %backedge]
|
|
%zero_cond = icmp eq i32 %iv, 0
|
|
br i1 %zero_cond, label %exit, label %range_check_block
|
|
|
|
range_check_block:
|
|
%iv.next = sub i32 %iv, 1
|
|
%range_check = icmp ult i32 %iv.next, %len
|
|
br i1 %range_check, label %backedge, label %fail
|
|
|
|
backedge:
|
|
%el.ptr = getelementptr i32, i32* %p, i32 %iv
|
|
%el = load i32, i32* %el.ptr
|
|
%loop.cond = icmp eq i32 %el, 0
|
|
br i1 %loop.cond, label %loop, label %exit
|
|
|
|
exit:
|
|
ret void
|
|
|
|
fail:
|
|
unreachable
|
|
}
|
|
|
|
define void @test_can_predicate_simple_signed(i32* %p, i32* %arr) {
|
|
; CHECK-LABEL: @test_can_predicate_simple_signed(
|
|
; CHECK-NEXT: preheader:
|
|
; CHECK-NEXT: [[LEN:%.*]] = load i32, i32* [[P:%.*]], align 4
|
|
; CHECK-NEXT: br label [[LOOP:%.*]]
|
|
; CHECK: loop:
|
|
; CHECK-NEXT: [[IV:%.*]] = phi i32 [ [[LEN]], [[PREHEADER:%.*]] ], [ [[IV_NEXT:%.*]], [[BACKEDGE:%.*]] ]
|
|
; CHECK-NEXT: [[ZERO_COND:%.*]] = icmp eq i32 [[IV]], 0
|
|
; CHECK-NEXT: br i1 [[ZERO_COND]], label [[EXIT:%.*]], label [[RANGE_CHECK_BLOCK:%.*]]
|
|
; CHECK: range_check_block:
|
|
; CHECK-NEXT: [[IV_NEXT]] = sub i32 [[IV]], 1
|
|
; CHECK-NEXT: [[RANGE_CHECK:%.*]] = icmp slt i32 [[IV_NEXT]], [[LEN]]
|
|
; CHECK-NEXT: br i1 [[RANGE_CHECK]], label [[BACKEDGE]], label [[FAIL:%.*]]
|
|
; CHECK: backedge:
|
|
; CHECK-NEXT: [[EL_PTR:%.*]] = getelementptr i32, i32* [[P]], i32 [[IV]]
|
|
; CHECK-NEXT: [[EL:%.*]] = load i32, i32* [[EL_PTR]], align 4
|
|
; CHECK-NEXT: [[LOOP_COND:%.*]] = icmp eq i32 [[EL]], 0
|
|
; CHECK-NEXT: br i1 [[LOOP_COND]], label [[LOOP]], label [[EXIT]]
|
|
; CHECK: exit:
|
|
; CHECK-NEXT: ret void
|
|
; CHECK: fail:
|
|
; CHECK-NEXT: unreachable
|
|
;
|
|
preheader:
|
|
%len = load i32, i32* %p
|
|
br label %loop
|
|
|
|
loop:
|
|
%iv = phi i32 [%len, %preheader], [%iv.next, %backedge]
|
|
%zero_cond = icmp eq i32 %iv, 0
|
|
br i1 %zero_cond, label %exit, label %range_check_block
|
|
|
|
range_check_block:
|
|
%iv.next = sub i32 %iv, 1
|
|
%range_check = icmp slt i32 %iv.next, %len
|
|
br i1 %range_check, label %backedge, label %fail
|
|
|
|
backedge:
|
|
%el.ptr = getelementptr i32, i32* %p, i32 %iv
|
|
%el = load i32, i32* %el.ptr
|
|
%loop.cond = icmp eq i32 %el, 0
|
|
br i1 %loop.cond, label %loop, label %exit
|
|
|
|
exit:
|
|
ret void
|
|
|
|
fail:
|
|
unreachable
|
|
}
|
|
|
|
!0 = !{i32 0, i32 2147483647}
|