forked from OSchip/llvm-project
646 lines
22 KiB
LLVM
646 lines
22 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -S -loop-unroll -verify-dom-info | FileCheck %s
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declare void @f1()
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declare void @f2()
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; Check that we can peel off iterations that make conditions true.
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define void @test1(i32 %k) {
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; CHECK-LABEL: @test1(
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; CHECK-NEXT: for.body.lr.ph:
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; CHECK-NEXT: br label [[FOR_BODY_PEEL_BEGIN:%.*]]
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; CHECK: for.body.peel.begin:
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; CHECK-NEXT: br label [[FOR_BODY_PEEL:%.*]]
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; CHECK: for.body.peel:
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; CHECK-NEXT: [[CMP1_PEEL:%.*]] = icmp ult i32 0, 2
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; CHECK-NEXT: br i1 [[CMP1_PEEL]], label [[IF_THEN_PEEL:%.*]], label [[IF_ELSE_PEEL:%.*]]
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; CHECK: if.else.peel:
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; CHECK-NEXT: call void @f2()
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; CHECK-NEXT: br label [[FOR_INC_PEEL:%.*]]
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; CHECK: if.then.peel:
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; CHECK-NEXT: call void @f1()
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; CHECK-NEXT: br label [[FOR_INC_PEEL]]
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; CHECK: for.inc.peel:
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; CHECK-NEXT: [[INC_PEEL:%.*]] = add nsw i32 0, 1
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; CHECK-NEXT: [[CMP_PEEL:%.*]] = icmp slt i32 [[INC_PEEL]], [[K:%.*]]
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; CHECK-NEXT: br i1 [[CMP_PEEL]], label [[FOR_BODY_PEEL_NEXT:%.*]], label [[FOR_END:%[^,]*]]
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; Verify that MD_loop metadata is dropped.
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; CHECK-NOT: , !llvm.loop !{{[0-9]*}}
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; CHECK: for.body.peel.next:
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; CHECK-NEXT: br label [[FOR_BODY_PEEL2:%.*]]
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; CHECK: for.body.peel2:
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; CHECK-NEXT: [[CMP1_PEEL3:%.*]] = icmp ult i32 [[INC_PEEL]], 2
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; CHECK-NEXT: br i1 [[CMP1_PEEL3]], label [[IF_THEN_PEEL5:%.*]], label [[IF_ELSE_PEEL4:%.*]]
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; CHECK: if.else.peel4:
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; CHECK-NEXT: call void @f2()
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; CHECK-NEXT: br label [[FOR_INC_PEEL6:%.*]]
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; CHECK: if.then.peel5:
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; CHECK-NEXT: call void @f1()
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; CHECK-NEXT: br label [[FOR_INC_PEEL6]]
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; CHECK: for.inc.peel6:
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; CHECK-NEXT: [[INC_PEEL7:%.*]] = add nsw i32 [[INC_PEEL]], 1
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; CHECK-NEXT: [[CMP_PEEL8:%.*]] = icmp slt i32 [[INC_PEEL7]], [[K]]
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; CHECK-NEXT: br i1 [[CMP_PEEL8]], label [[FOR_BODY_PEEL_NEXT1:%.*]], label [[FOR_END]]
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; Verify that MD_loop metadata is dropped.
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; CHECK-NOT: , !llvm.loop !{{[0-9]*}}
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; CHECK: for.body.peel.next1:
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; CHECK-NEXT: br label [[FOR_BODY_PEEL_NEXT9:%.*]]
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; CHECK: for.body.peel.next9:
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; CHECK-NEXT: br label [[FOR_BODY_LR_PH_PEEL_NEWPH:%.*]]
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; CHECK: for.body.lr.ph.peel.newph:
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; CHECK-NEXT: br label [[FOR_BODY:%.*]]
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; CHECK: for.body:
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; CHECK-NEXT: [[I_05:%.*]] = phi i32 [ [[INC_PEEL7]], [[FOR_BODY_LR_PH_PEEL_NEWPH]] ], [ [[INC:%.*]], [[FOR_INC:%.*]] ]
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; CHECK-NEXT: br i1 false, label [[IF_THEN:%.*]], label [[IF_ELSE:%.*]]
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; CHECK: if.then:
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; CHECK-NEXT: call void @f1()
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; CHECK-NEXT: br label [[FOR_INC]]
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; CHECK: if.else:
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; CHECK-NEXT: call void @f2()
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; CHECK-NEXT: br label [[FOR_INC]]
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; CHECK: for.inc:
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; CHECK-NEXT: [[INC]] = add nuw nsw i32 [[I_05]], 1
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; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[INC]], [[K]]
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; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[FOR_END_LOOPEXIT:%.*]], !llvm.loop !{{.*}}
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; CHECK: for.end.loopexit:
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; CHECK-NEXT: br label [[FOR_END]]
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; CHECK: for.end:
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; CHECK-NEXT: ret void
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;
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for.body.lr.ph:
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br label %for.body
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for.body:
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%i.05 = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %for.inc ]
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%cmp1 = icmp ult i32 %i.05, 2
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br i1 %cmp1, label %if.then, label %if.else
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if.then:
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call void @f1()
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br label %for.inc
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if.else:
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call void @f2()
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br label %for.inc
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for.inc:
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%inc = add nsw i32 %i.05, 1
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%cmp = icmp slt i32 %inc, %k
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br i1 %cmp, label %for.body, label %for.end, !llvm.loop !1
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for.end:
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ret void
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}
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!1 = distinct !{!1}
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; Check we peel off the maximum number of iterations that make conditions true.
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define void @test2(i32 %k) {
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; CHECK-LABEL: @test2(
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; CHECK-NEXT: for.body.lr.ph:
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; CHECK-NEXT: br label [[FOR_BODY_PEEL_BEGIN:%.*]]
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; CHECK: for.body.peel.begin:
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; CHECK-NEXT: br label [[FOR_BODY_PEEL:%.*]]
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; CHECK: for.body.peel:
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; CHECK-NEXT: [[CMP1_PEEL:%.*]] = icmp ult i32 0, 2
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; CHECK-NEXT: br i1 [[CMP1_PEEL]], label [[IF_THEN_PEEL:%.*]], label [[IF_ELSE_PEEL:%.*]]
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; CHECK: if.else.peel:
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; CHECK-NEXT: call void @f2()
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; CHECK-NEXT: br label [[IF2_PEEL:%.*]]
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; CHECK: if.then.peel:
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; CHECK-NEXT: call void @f1()
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; CHECK-NEXT: br label [[IF2_PEEL]]
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; CHECK: if2.peel:
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; CHECK-NEXT: [[CMP2_PEEL:%.*]] = icmp ult i32 0, 4
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; CHECK-NEXT: br i1 [[CMP2_PEEL]], label [[IF_THEN2_PEEL:%.*]], label [[FOR_INC_PEEL:%.*]]
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; CHECK: if.then2.peel:
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; CHECK-NEXT: call void @f1()
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; CHECK-NEXT: br label [[FOR_INC_PEEL]]
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; CHECK: for.inc.peel:
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; CHECK-NEXT: [[INC_PEEL:%.*]] = add nsw i32 0, 1
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; CHECK-NEXT: [[CMP_PEEL:%.*]] = icmp slt i32 [[INC_PEEL]], [[K:%.*]]
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; CHECK-NEXT: br i1 [[CMP_PEEL]], label [[FOR_BODY_PEEL_NEXT:%.*]], label [[FOR_END:%[^,]*]]
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; Verify that MD_loop metadata is dropped.
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; CHECK-NOT: , !llvm.loop !{{[0-9]*}}
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; CHECK: for.body.peel.next:
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; CHECK-NEXT: br label [[FOR_BODY_PEEL2:%.*]]
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; CHECK: for.body.peel2:
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; CHECK-NEXT: [[CMP1_PEEL3:%.*]] = icmp ult i32 [[INC_PEEL]], 2
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; CHECK-NEXT: br i1 [[CMP1_PEEL3]], label [[IF_THEN_PEEL5:%.*]], label [[IF_ELSE_PEEL4:%.*]]
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; CHECK: if.else.peel4:
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; CHECK-NEXT: call void @f2()
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; CHECK-NEXT: br label [[IF2_PEEL6:%.*]]
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; CHECK: if.then.peel5:
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; CHECK-NEXT: call void @f1()
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; CHECK-NEXT: br label [[IF2_PEEL6]]
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; CHECK: if2.peel6:
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; CHECK-NEXT: [[CMP2_PEEL7:%.*]] = icmp ult i32 [[INC_PEEL]], 4
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; CHECK-NEXT: br i1 [[CMP2_PEEL7]], label [[IF_THEN2_PEEL8:%.*]], label [[FOR_INC_PEEL9:%.*]]
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; CHECK: if.then2.peel8:
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; CHECK-NEXT: call void @f1()
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; CHECK-NEXT: br label [[FOR_INC_PEEL9]]
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; CHECK: for.inc.peel9:
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; CHECK-NEXT: [[INC_PEEL10:%.*]] = add nsw i32 [[INC_PEEL]], 1
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; CHECK-NEXT: [[CMP_PEEL11:%.*]] = icmp slt i32 [[INC_PEEL10]], [[K]]
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; CHECK-NEXT: br i1 [[CMP_PEEL11]], label [[FOR_BODY_PEEL_NEXT1:%.*]], label [[FOR_END]]
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; Verify that MD_loop metadata is dropped.
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; CHECK-NOT: , !llvm.loop !{{[0-9]*}}
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; CHECK: for.body.peel.next1:
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; CHECK-NEXT: br label [[FOR_BODY_PEEL13:%.*]]
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; CHECK: for.body.peel13:
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; CHECK-NEXT: [[CMP1_PEEL14:%.*]] = icmp ult i32 [[INC_PEEL10]], 2
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; CHECK-NEXT: br i1 [[CMP1_PEEL14]], label [[IF_THEN_PEEL16:%.*]], label [[IF_ELSE_PEEL15:%.*]]
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; CHECK: if.else.peel15:
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; CHECK-NEXT: call void @f2()
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; CHECK-NEXT: br label [[IF2_PEEL17:%.*]]
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; CHECK: if.then.peel16:
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; CHECK-NEXT: call void @f1()
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; CHECK-NEXT: br label [[IF2_PEEL17]]
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; CHECK: if2.peel17:
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; CHECK-NEXT: [[CMP2_PEEL18:%.*]] = icmp ult i32 [[INC_PEEL10]], 4
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; CHECK-NEXT: br i1 [[CMP2_PEEL18]], label [[IF_THEN2_PEEL19:%.*]], label [[FOR_INC_PEEL20:%.*]]
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; CHECK: if.then2.peel19:
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; CHECK-NEXT: call void @f1()
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; CHECK-NEXT: br label [[FOR_INC_PEEL20]]
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; CHECK: for.inc.peel20:
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; CHECK-NEXT: [[INC_PEEL21:%.*]] = add nsw i32 [[INC_PEEL10]], 1
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; CHECK-NEXT: [[CMP_PEEL22:%.*]] = icmp slt i32 [[INC_PEEL21]], [[K]]
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; CHECK-NEXT: br i1 [[CMP_PEEL22]], label [[FOR_BODY_PEEL_NEXT12:%.*]], label [[FOR_END]]
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; Verify that MD_loop metadata is dropped.
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; CHECK-NOT: , !llvm.loop !{{[0-9]*}}
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; CHECK: for.body.peel.next12:
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; CHECK-NEXT: br label [[FOR_BODY_PEEL24:%.*]]
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; CHECK: for.body.peel24:
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; CHECK-NEXT: [[CMP1_PEEL25:%.*]] = icmp ult i32 [[INC_PEEL21]], 2
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; CHECK-NEXT: br i1 [[CMP1_PEEL25]], label [[IF_THEN_PEEL27:%.*]], label [[IF_ELSE_PEEL26:%.*]]
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; CHECK: if.else.peel26:
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; CHECK-NEXT: call void @f2()
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; CHECK-NEXT: br label [[IF2_PEEL28:%.*]]
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; CHECK: if.then.peel27:
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; CHECK-NEXT: call void @f1()
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; CHECK-NEXT: br label [[IF2_PEEL28]]
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; CHECK: if2.peel28:
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; CHECK-NEXT: [[CMP2_PEEL29:%.*]] = icmp ult i32 [[INC_PEEL21]], 4
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; CHECK-NEXT: br i1 [[CMP2_PEEL29]], label [[IF_THEN2_PEEL30:%.*]], label [[FOR_INC_PEEL31:%.*]]
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; CHECK: if.then2.peel30:
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; CHECK-NEXT: call void @f1()
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; CHECK-NEXT: br label [[FOR_INC_PEEL31]]
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; CHECK: for.inc.peel31:
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; CHECK-NEXT: [[INC_PEEL32:%.*]] = add nsw i32 [[INC_PEEL21]], 1
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; CHECK-NEXT: [[CMP_PEEL33:%.*]] = icmp slt i32 [[INC_PEEL32]], [[K]]
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; CHECK-NEXT: br i1 [[CMP_PEEL33]], label [[FOR_BODY_PEEL_NEXT23:%.*]], label [[FOR_END]]
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; Verify that MD_loop metadata is dropped.
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; CHECK-NOT: , !llvm.loop !{{[0-9]*}}
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; CHECK: for.body.peel.next23:
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; CHECK-NEXT: br label [[FOR_BODY_PEEL_NEXT34:%.*]]
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; CHECK: for.body.peel.next34:
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; CHECK-NEXT: br label [[FOR_BODY_LR_PH_PEEL_NEWPH:%.*]]
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; CHECK: for.body.lr.ph.peel.newph:
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; CHECK-NEXT: br label [[FOR_BODY:%.*]]
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; CHECK: for.body:
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; CHECK-NEXT: [[I_05:%.*]] = phi i32 [ [[INC_PEEL32]], [[FOR_BODY_LR_PH_PEEL_NEWPH]] ], [ [[INC:%.*]], [[FOR_INC:%.*]] ]
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; CHECK-NEXT: br i1 false, label [[IF_THEN:%.*]], label [[IF_ELSE:%.*]]
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; CHECK: if.then:
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; CHECK-NEXT: call void @f1()
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; CHECK-NEXT: br label [[IF2:%.*]]
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; CHECK: if.else:
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; CHECK-NEXT: call void @f2()
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; CHECK-NEXT: br label [[IF2]]
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; CHECK: if2:
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; CHECK-NEXT: br i1 false, label [[IF_THEN2:%.*]], label [[FOR_INC]]
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; CHECK: if.then2:
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; CHECK-NEXT: call void @f1()
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; CHECK-NEXT: br label [[FOR_INC]]
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; CHECK: for.inc:
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; CHECK-NEXT: [[INC]] = add nuw nsw i32 [[I_05]], 1
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; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[INC]], [[K]]
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; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[FOR_END_LOOPEXIT:%.*]], !llvm.loop !{{.*}}
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; CHECK: for.end.loopexit:
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; CHECK-NEXT: br label [[FOR_END]]
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; CHECK: for.end:
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; CHECK-NEXT: ret void
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;
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for.body.lr.ph:
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br label %for.body
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for.body:
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%i.05 = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %for.inc ]
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%cmp1 = icmp ult i32 %i.05, 2
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br i1 %cmp1, label %if.then, label %if.else
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if.then:
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call void @f1()
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br label %if2
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if.else:
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call void @f2()
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br label %if2
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if2:
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%cmp2 = icmp ult i32 %i.05, 4
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br i1 %cmp2, label %if.then2, label %for.inc
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if.then2:
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call void @f1()
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br label %for.inc
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for.inc:
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%inc = add nsw i32 %i.05, 1
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%cmp = icmp slt i32 %inc, %k
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br i1 %cmp, label %for.body, label %for.end, !llvm.loop !2
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for.end:
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ret void
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}
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!2 = distinct !{!2}
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; Check that we can peel off iterations that make a condition false.
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define void @test3(i32 %k) {
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; CHECK-LABEL: @test3(
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; CHECK-NEXT: for.body.lr.ph:
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; CHECK-NEXT: br label [[FOR_BODY_PEEL_BEGIN:%.*]]
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; CHECK: for.body.peel.begin:
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; CHECK-NEXT: br label [[FOR_BODY_PEEL:%.*]]
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; CHECK: for.body.peel:
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; CHECK-NEXT: [[CMP1_PEEL:%.*]] = icmp ugt i32 0, 2
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; CHECK-NEXT: br i1 [[CMP1_PEEL]], label [[IF_THEN_PEEL:%.*]], label [[IF_ELSE_PEEL:%.*]]
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; CHECK: if.else.peel:
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; CHECK-NEXT: call void @f2()
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; CHECK-NEXT: br label [[FOR_INC_PEEL:%.*]]
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; CHECK: if.then.peel:
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; CHECK-NEXT: call void @f1()
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; CHECK-NEXT: br label [[FOR_INC_PEEL]]
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; CHECK: for.inc.peel:
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; CHECK-NEXT: [[INC_PEEL:%.*]] = add nsw i32 0, 1
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; CHECK-NEXT: [[CMP_PEEL:%.*]] = icmp slt i32 [[INC_PEEL]], [[K:%.*]]
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; CHECK-NEXT: br i1 [[CMP_PEEL]], label [[FOR_BODY_PEEL_NEXT:%.*]], label [[FOR_END:%[^,]*]]
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; Verify that MD_loop metadata is dropped.
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; CHECK-NOT: , !llvm.loop !{{[0-9]*}}
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; CHECK: for.body.peel.next:
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|
|
; CHECK-NEXT: br label [[FOR_BODY_PEEL2:%.*]]
|
||
|
|
; CHECK: for.body.peel2:
|
||
|
|
; CHECK-NEXT: [[CMP1_PEEL3:%.*]] = icmp ugt i32 [[INC_PEEL]], 2
|
||
|
|
; CHECK-NEXT: br i1 [[CMP1_PEEL3]], label [[IF_THEN_PEEL5:%.*]], label [[IF_ELSE_PEEL4:%.*]]
|
||
|
|
; CHECK: if.else.peel4:
|
||
|
|
; CHECK-NEXT: call void @f2()
|
||
|
|
; CHECK-NEXT: br label [[FOR_INC_PEEL6:%.*]]
|
||
|
|
; CHECK: if.then.peel5:
|
||
|
|
; CHECK-NEXT: call void @f1()
|
||
|
|
; CHECK-NEXT: br label [[FOR_INC_PEEL6]]
|
||
|
|
; CHECK: for.inc.peel6:
|
||
|
|
; CHECK-NEXT: [[INC_PEEL7:%.*]] = add nsw i32 [[INC_PEEL]], 1
|
||
|
|
; CHECK-NEXT: [[CMP_PEEL8:%.*]] = icmp slt i32 [[INC_PEEL7]], [[K]]
|
||
|
|
; CHECK-NEXT: br i1 [[CMP_PEEL8]], label [[FOR_BODY_PEEL_NEXT1:%.*]], label [[FOR_END]]
|
||
|
|
; Verify that MD_loop metadata is dropped.
|
||
|
|
; CHECK-NOT: , !llvm.loop !{{[0-9]*}}
|
||
|
|
; CHECK: for.body.peel.next1:
|
||
|
|
; CHECK-NEXT: br label [[FOR_BODY_PEEL10:%.*]]
|
||
|
|
; CHECK: for.body.peel10:
|
||
|
|
; CHECK-NEXT: [[CMP1_PEEL11:%.*]] = icmp ugt i32 [[INC_PEEL7]], 2
|
||
|
|
; CHECK-NEXT: br i1 [[CMP1_PEEL11]], label [[IF_THEN_PEEL13:%.*]], label [[IF_ELSE_PEEL12:%.*]]
|
||
|
|
; CHECK: if.else.peel12:
|
||
|
|
; CHECK-NEXT: call void @f2()
|
||
|
|
; CHECK-NEXT: br label [[FOR_INC_PEEL14:%.*]]
|
||
|
|
; CHECK: if.then.peel13:
|
||
|
|
; CHECK-NEXT: call void @f1()
|
||
|
|
; CHECK-NEXT: br label [[FOR_INC_PEEL14]]
|
||
|
|
; CHECK: for.inc.peel14:
|
||
|
|
; CHECK-NEXT: [[INC_PEEL15:%.*]] = add nsw i32 [[INC_PEEL7]], 1
|
||
|
|
; CHECK-NEXT: [[CMP_PEEL16:%.*]] = icmp slt i32 [[INC_PEEL15]], [[K]]
|
||
|
|
; CHECK-NEXT: br i1 [[CMP_PEEL16]], label [[FOR_BODY_PEEL_NEXT9:%.*]], label [[FOR_END]]
|
||
|
|
; Verify that MD_loop metadata is dropped.
|
||
|
|
; CHECK-NOT: , !llvm.loop !{{[0-9]*}}
|
||
|
|
; CHECK: for.body.peel.next9:
|
||
|
|
; CHECK-NEXT: br label [[FOR_BODY_PEEL_NEXT17:%.*]]
|
||
|
|
; CHECK: for.body.peel.next17:
|
||
|
|
; CHECK-NEXT: br label [[FOR_BODY_LR_PH_PEEL_NEWPH:%.*]]
|
||
|
|
; CHECK: for.body.lr.ph.peel.newph:
|
||
|
|
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
|
||
|
|
; CHECK: for.body:
|
||
|
|
; CHECK-NEXT: [[I_05:%.*]] = phi i32 [ [[INC_PEEL15]], [[FOR_BODY_LR_PH_PEEL_NEWPH]] ], [ [[INC:%.*]], [[FOR_INC:%.*]] ]
|
||
|
|
; CHECK-NEXT: br i1 true, label [[IF_THEN:%.*]], label [[IF_ELSE:%.*]]
|
||
|
|
; CHECK: if.then:
|
||
|
|
; CHECK-NEXT: call void @f1()
|
||
|
|
; CHECK-NEXT: br label [[FOR_INC]]
|
||
|
|
; CHECK: if.else:
|
||
|
|
; CHECK-NEXT: call void @f2()
|
||
|
|
; CHECK-NEXT: br label [[FOR_INC]]
|
||
|
|
; CHECK: for.inc:
|
||
|
|
; CHECK-NEXT: [[INC]] = add nuw nsw i32 [[I_05]], 1
|
||
|
|
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[INC]], [[K]]
|
||
|
|
; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[FOR_END_LOOPEXIT:%.*]], !llvm.loop !{{.*}}
|
||
|
|
; CHECK: for.end.loopexit:
|
||
|
|
; CHECK-NEXT: br label [[FOR_END]]
|
||
|
|
; CHECK: for.end:
|
||
|
|
; CHECK-NEXT: ret void
|
||
|
|
;
|
||
|
|
for.body.lr.ph:
|
||
|
|
br label %for.body
|
||
|
|
|
||
|
|
for.body:
|
||
|
|
%i.05 = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %for.inc ]
|
||
|
|
%cmp1 = icmp ugt i32 %i.05, 2
|
||
|
|
br i1 %cmp1, label %if.then, label %if.else
|
||
|
|
|
||
|
|
if.then:
|
||
|
|
call void @f1()
|
||
|
|
br label %for.inc
|
||
|
|
|
||
|
|
if.else:
|
||
|
|
call void @f2()
|
||
|
|
br label %for.inc
|
||
|
|
|
||
|
|
for.inc:
|
||
|
|
%inc = add nsw i32 %i.05, 1
|
||
|
|
%cmp = icmp slt i32 %inc, %k
|
||
|
|
br i1 %cmp, label %for.body, label %for.end, !llvm.loop !3
|
||
|
|
|
||
|
|
for.end:
|
||
|
|
ret void
|
||
|
|
}
|
||
|
|
|
||
|
|
!3 = distinct !{!3}
|
||
|
|
|
||
|
|
; Test that we only peel off iterations if it simplifies a condition in the
|
||
|
|
; loop body after peeling at most MaxPeelCount iterations.
|
||
|
|
define void @test4(i32 %k) {
|
||
|
|
; CHECK-LABEL: @test4(
|
||
|
|
; CHECK-NEXT: for.body.lr.ph:
|
||
|
|
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
|
||
|
|
; CHECK: for.body:
|
||
|
|
; CHECK-NEXT: [[I_05:%.*]] = phi i32 [ 0, [[FOR_BODY_LR_PH:%.*]] ], [ [[INC:%.*]], [[FOR_INC:%.*]] ]
|
||
|
|
; CHECK-NEXT: [[CMP1:%.*]] = icmp ugt i32 [[I_05]], 9999
|
||
|
|
; CHECK-NEXT: br i1 [[CMP1]], label [[IF_THEN:%.*]], label [[FOR_INC]]
|
||
|
|
; CHECK: if.then:
|
||
|
|
; CHECK-NEXT: call void @f1()
|
||
|
|
; CHECK-NEXT: br label [[FOR_INC]]
|
||
|
|
; CHECK: for.inc:
|
||
|
|
; CHECK-NEXT: [[INC]] = add nsw i32 [[I_05]], 1
|
||
|
|
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[INC]], [[K:%.*]]
|
||
|
|
; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[FOR_END:%.*]]
|
||
|
|
; CHECK: for.end:
|
||
|
|
; CHECK-NEXT: ret void
|
||
|
|
;
|
||
|
|
for.body.lr.ph:
|
||
|
|
br label %for.body
|
||
|
|
|
||
|
|
for.body:
|
||
|
|
%i.05 = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %for.inc ]
|
||
|
|
%cmp1 = icmp ugt i32 %i.05, 9999
|
||
|
|
br i1 %cmp1, label %if.then, label %for.inc
|
||
|
|
|
||
|
|
if.then:
|
||
|
|
call void @f1()
|
||
|
|
br label %for.inc
|
||
|
|
|
||
|
|
for.inc:
|
||
|
|
%inc = add nsw i32 %i.05, 1
|
||
|
|
%cmp = icmp slt i32 %inc, %k
|
||
|
|
br i1 %cmp, label %for.body, label %for.end
|
||
|
|
|
||
|
|
for.end:
|
||
|
|
ret void
|
||
|
|
}
|
||
|
|
|
||
|
|
; In this case we cannot peel the inner loop, because the condition involves
|
||
|
|
; the outer induction variable.
|
||
|
|
define void @test5(i32 %k) {
|
||
|
|
; CHECK-LABEL: @test5(
|
||
|
|
; CHECK-NEXT: for.body.lr.ph:
|
||
|
|
; CHECK-NEXT: br label [[OUTER_HEADER:%.*]]
|
||
|
|
; CHECK: outer.header:
|
||
|
|
; CHECK-NEXT: [[J:%.*]] = phi i32 [ 0, [[FOR_BODY_LR_PH:%.*]] ], [ [[J_INC:%.*]], [[OUTER_INC:%.*]] ]
|
||
|
|
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
|
||
|
|
; CHECK: for.body:
|
||
|
|
; CHECK-NEXT: [[I_05:%.*]] = phi i32 [ 0, [[OUTER_HEADER]] ], [ [[INC:%.*]], [[FOR_INC:%.*]] ]
|
||
|
|
; CHECK-NEXT: [[CMP1:%.*]] = icmp ult i32 [[J]], 2
|
||
|
|
; CHECK-NEXT: br i1 [[CMP1]], label [[IF_THEN:%.*]], label [[IF_ELSE:%.*]]
|
||
|
|
; CHECK: if.then:
|
||
|
|
; CHECK-NEXT: call void @f1()
|
||
|
|
; CHECK-NEXT: br label [[FOR_INC]]
|
||
|
|
; CHECK: if.else:
|
||
|
|
; CHECK-NEXT: call void @f2()
|
||
|
|
; CHECK-NEXT: br label [[FOR_INC]]
|
||
|
|
; CHECK: for.inc:
|
||
|
|
; CHECK-NEXT: [[INC]] = add nsw i32 [[I_05]], 1
|
||
|
|
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[INC]], [[K:%.*]]
|
||
|
|
; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[OUTER_INC]]
|
||
|
|
; CHECK: outer.inc:
|
||
|
|
; CHECK-NEXT: [[J_INC]] = add nsw i32 [[J]], 1
|
||
|
|
; CHECK-NEXT: [[OUTER_CMP:%.*]] = icmp slt i32 [[J_INC]], [[K]]
|
||
|
|
; CHECK-NEXT: br i1 [[OUTER_CMP]], label [[OUTER_HEADER]], label [[FOR_END:%.*]]
|
||
|
|
; CHECK: for.end:
|
||
|
|
; CHECK-NEXT: ret void
|
||
|
|
;
|
||
|
|
for.body.lr.ph:
|
||
|
|
br label %outer.header
|
||
|
|
|
||
|
|
outer.header:
|
||
|
|
%j = phi i32 [ 0, %for.body.lr.ph ], [ %j.inc, %outer.inc ]
|
||
|
|
br label %for.body
|
||
|
|
|
||
|
|
for.body:
|
||
|
|
%i.05 = phi i32 [ 0, %outer.header ], [ %inc, %for.inc ]
|
||
|
|
%cmp1 = icmp ult i32 %j, 2
|
||
|
|
br i1 %cmp1, label %if.then, label %if.else
|
||
|
|
|
||
|
|
if.then:
|
||
|
|
call void @f1()
|
||
|
|
br label %for.inc
|
||
|
|
|
||
|
|
if.else:
|
||
|
|
call void @f2()
|
||
|
|
br label %for.inc
|
||
|
|
|
||
|
|
for.inc:
|
||
|
|
%inc = add nsw i32 %i.05, 1
|
||
|
|
%cmp = icmp slt i32 %inc, %k
|
||
|
|
br i1 %cmp, label %for.body, label %outer.inc
|
||
|
|
|
||
|
|
outer.inc:
|
||
|
|
%j.inc = add nsw i32 %j, 1
|
||
|
|
%outer.cmp = icmp slt i32 %j.inc, %k
|
||
|
|
br i1 %outer.cmp, label %outer.header, label %for.end
|
||
|
|
|
||
|
|
|
||
|
|
for.end:
|
||
|
|
ret void
|
||
|
|
}
|
||
|
|
|
||
|
|
; In this test, the condition involves 2 AddRecs. Without evaluating both
|
||
|
|
; AddRecs, we cannot prove that the condition becomes known in the loop body
|
||
|
|
; after peeling.
|
||
|
|
define void @test6(i32 %k) {
|
||
|
|
; CHECK-LABEL: @test6(
|
||
|
|
; CHECK-NEXT: entry:
|
||
|
|
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
|
||
|
|
; CHECK: for.body:
|
||
|
|
; CHECK-NEXT: [[I_05:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_INC:%.*]] ]
|
||
|
|
; CHECK-NEXT: [[J:%.*]] = phi i32 [ 4, [[ENTRY]] ], [ [[J_INC:%.*]], [[FOR_INC]] ]
|
||
|
|
; CHECK-NEXT: [[CMP1:%.*]] = icmp ult i32 [[I_05]], [[J]]
|
||
|
|
; CHECK-NEXT: br i1 [[CMP1]], label [[IF_THEN:%.*]], label [[IF_ELSE:%.*]]
|
||
|
|
; CHECK: if.then:
|
||
|
|
; CHECK-NEXT: call void @f1()
|
||
|
|
; CHECK-NEXT: br label [[FOR_INC]]
|
||
|
|
; CHECK: if.else:
|
||
|
|
; CHECK-NEXT: call void @f2()
|
||
|
|
; CHECK-NEXT: br label [[FOR_INC]]
|
||
|
|
; CHECK: for.inc:
|
||
|
|
; CHECK-NEXT: [[INC]] = add nsw i32 [[I_05]], 2
|
||
|
|
; CHECK-NEXT: [[J_INC]] = add nsw i32 [[J]], 1
|
||
|
|
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[INC]], [[K:%.*]]
|
||
|
|
; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[FOR_END:%.*]]
|
||
|
|
; CHECK: for.end:
|
||
|
|
; CHECK-NEXT: ret void
|
||
|
|
;
|
||
|
|
entry:
|
||
|
|
br label %for.body
|
||
|
|
|
||
|
|
for.body:
|
||
|
|
%i.05 = phi i32 [ 0, %entry ], [ %inc, %for.inc ]
|
||
|
|
%j = phi i32 [ 4, %entry ], [ %j.inc, %for.inc ]
|
||
|
|
%cmp1 = icmp ult i32 %i.05, %j
|
||
|
|
br i1 %cmp1, label %if.then, label %if.else
|
||
|
|
|
||
|
|
if.then:
|
||
|
|
call void @f1()
|
||
|
|
br label %for.inc
|
||
|
|
|
||
|
|
if.else:
|
||
|
|
call void @f2()
|
||
|
|
br label %for.inc
|
||
|
|
|
||
|
|
for.inc:
|
||
|
|
%inc = add nsw i32 %i.05, 2
|
||
|
|
%j.inc = add nsw i32 %j, 1
|
||
|
|
%cmp = icmp slt i32 %inc, %k
|
||
|
|
br i1 %cmp, label %for.body, label %for.end
|
||
|
|
|
||
|
|
for.end:
|
||
|
|
ret void
|
||
|
|
}
|
||
|
|
|
||
|
|
define void @test7(i32 %k) {
|
||
|
|
; FIXME: Could simplify loop body by peeling one additional iteration after
|
||
|
|
; i != 3 becomes false
|
||
|
|
; CHECK-LABEL: @test7(
|
||
|
|
; CHECK-NEXT: for.body.lr.ph:
|
||
|
|
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
|
||
|
|
; CHECK: for.body:
|
||
|
|
; CHECK-NEXT: [[I_05:%.*]] = phi i32 [ 0, [[FOR_BODY_LR_PH:%.*]] ], [ [[INC:%.*]], [[FOR_INC:%.*]] ]
|
||
|
|
; CHECK-NEXT: [[CMP1:%.*]] = icmp ne i32 [[I_05]], 3
|
||
|
|
; CHECK-NEXT: br i1 [[CMP1]], label [[IF_THEN:%.*]], label [[FOR_INC]]
|
||
|
|
; CHECK: if.then:
|
||
|
|
; CHECK-NEXT: call void @f1()
|
||
|
|
; CHECK-NEXT: br label [[FOR_INC]]
|
||
|
|
; CHECK: for.inc:
|
||
|
|
; CHECK-NEXT: [[INC]] = add nsw i32 [[I_05]], 1
|
||
|
|
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[INC]], [[K:%.*]]
|
||
|
|
; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[FOR_END:%.*]]
|
||
|
|
; CHECK: for.end:
|
||
|
|
; CHECK-NEXT: ret void
|
||
|
|
;
|
||
|
|
for.body.lr.ph:
|
||
|
|
br label %for.body
|
||
|
|
|
||
|
|
for.body:
|
||
|
|
%i.05 = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %for.inc ]
|
||
|
|
%cmp1 = icmp ne i32 %i.05, 3
|
||
|
|
br i1 %cmp1, label %if.then, label %for.inc
|
||
|
|
|
||
|
|
if.then:
|
||
|
|
call void @f1()
|
||
|
|
br label %for.inc
|
||
|
|
|
||
|
|
for.inc:
|
||
|
|
%inc = add nsw i32 %i.05, 1
|
||
|
|
%cmp = icmp slt i32 %inc, %k
|
||
|
|
br i1 %cmp, label %for.body, label %for.end
|
||
|
|
|
||
|
|
for.end:
|
||
|
|
ret void
|
||
|
|
}
|
||
|
|
|
||
|
|
define void @test8(i32 %k) {
|
||
|
|
; FIXME: Could simplify loop body by peeling one additional iteration after
|
||
|
|
; i == 3 becomes true.
|
||
|
|
; CHECK-LABEL: @test8(
|
||
|
|
; CHECK-NEXT: for.body.lr.ph:
|
||
|
|
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
|
||
|
|
; CHECK: for.body:
|
||
|
|
; CHECK-NEXT: [[I_05:%.*]] = phi i32 [ 0, [[FOR_BODY_LR_PH:%.*]] ], [ [[INC:%.*]], [[FOR_INC:%.*]] ]
|
||
|
|
; CHECK-NEXT: [[CMP1:%.*]] = icmp eq i32 [[I_05]], 3
|
||
|
|
; CHECK-NEXT: br i1 [[CMP1]], label [[IF_THEN:%.*]], label [[FOR_INC]]
|
||
|
|
; CHECK: if.then:
|
||
|
|
; CHECK-NEXT: call void @f1()
|
||
|
|
; CHECK-NEXT: br label [[FOR_INC]]
|
||
|
|
; CHECK: for.inc:
|
||
|
|
; CHECK-NEXT: [[INC]] = add nsw i32 [[I_05]], 1
|
||
|
|
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[INC]], [[K:%.*]]
|
||
|
|
; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[FOR_END:%.*]]
|
||
|
|
; CHECK: for.end:
|
||
|
|
; CHECK-NEXT: ret void
|
||
|
|
;
|
||
|
|
for.body.lr.ph:
|
||
|
|
br label %for.body
|
||
|
|
|
||
|
|
for.body:
|
||
|
|
%i.05 = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %for.inc ]
|
||
|
|
%cmp1 = icmp eq i32 %i.05, 3
|
||
|
|
br i1 %cmp1, label %if.then, label %for.inc
|
||
|
|
|
||
|
|
if.then:
|
||
|
|
call void @f1()
|
||
|
|
br label %for.inc
|
||
|
|
|
||
|
|
for.inc:
|
||
|
|
%inc = add nsw i32 %i.05, 1
|
||
|
|
%cmp = icmp slt i32 %inc, %k
|
||
|
|
br i1 %cmp, label %for.body, label %for.end
|
||
|
|
|
||
|
|
for.end:
|
||
|
|
ret void
|
||
|
|
}
|
||
|
|
|
||
|
|
; Comparison with non-monotonic predicate due to possible wrapping, loop
|
||
|
|
; body cannot be simplified.
|
||
|
|
define void @test9(i32 %k) {
|
||
|
|
; CHECK-LABEL: @test9(
|
||
|
|
; CHECK-NEXT: for.body.lr.ph:
|
||
|
|
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
|
||
|
|
; CHECK: for.body:
|
||
|
|
; CHECK-NEXT: [[I_05:%.*]] = phi i32 [ 0, [[FOR_BODY_LR_PH:%.*]] ], [ [[INC:%.*]], [[FOR_INC:%.*]] ]
|
||
|
|
; CHECK-NEXT: [[CMP1:%.*]] = icmp slt i32 [[I_05]], 3
|
||
|
|
; CHECK-NEXT: br i1 [[CMP1]], label [[IF_THEN:%.*]], label [[FOR_INC]]
|
||
|
|
; CHECK: if.then:
|
||
|
|
; CHECK-NEXT: call void @f1()
|
||
|
|
; CHECK-NEXT: br label [[FOR_INC]]
|
||
|
|
; CHECK: for.inc:
|
||
|
|
; CHECK-NEXT: [[INC]] = add i32 [[I_05]], 1
|
||
|
|
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[INC]], [[K:%.*]]
|
||
|
|
; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[FOR_END:%.*]]
|
||
|
|
; CHECK: for.end:
|
||
|
|
; CHECK-NEXT: ret void
|
||
|
|
;
|
||
|
|
for.body.lr.ph:
|
||
|
|
br label %for.body
|
||
|
|
|
||
|
|
for.body:
|
||
|
|
%i.05 = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %for.inc ]
|
||
|
|
%cmp1 = icmp slt i32 %i.05, 3
|
||
|
|
br i1 %cmp1, label %if.then, label %for.inc
|
||
|
|
|
||
|
|
if.then:
|
||
|
|
call void @f1()
|
||
|
|
br label %for.inc
|
||
|
|
|
||
|
|
for.inc:
|
||
|
|
%inc = add i32 %i.05, 1
|
||
|
|
%cmp = icmp slt i32 %inc, %k
|
||
|
|
br i1 %cmp, label %for.body, label %for.end
|
||
|
|
|
||
|
|
for.end:
|
||
|
|
ret void
|
||
|
|
}
|