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1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py2; RUN: opt -passes=correlated-propagation -S %s | FileCheck %s3 4; Check that shift is not removed by CVP because of incorrect range returned by LVI::getConstantRangeAtUse.5; https://github.com/llvm/llvm-project/issues/606296 7define i32 @test(i32 %arg) {8; CHECK-LABEL: @test(9; CHECK-NEXT: entry:10; CHECK-NEXT: br label [[LOOP:%.*]]11; CHECK: loop:12; CHECK-NEXT: [[IV:%.*]] = phi i32 [ 127, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[DO_SHIFT:%.*]] ]13; CHECK-NEXT: [[SHIFTED_IV:%.*]] = phi i32 [ 0, [[ENTRY]] ], [ [[SHIFT:%.*]], [[DO_SHIFT]] ]14; CHECK-NEXT: [[IV_NEXT]] = add i32 [[IV]], 115; CHECK-NEXT: [[LOOP_COND:%.*]] = icmp sgt i32 [[IV]], 12716; CHECK-NEXT: br i1 [[LOOP_COND]], label [[EXIT:%.*]], label [[DO_SHIFT]]17; CHECK: do.shift:18; CHECK-NEXT: [[SHIFT]] = ashr i32 [[IV]], [[ARG:%.*]]19; CHECK-NEXT: br label [[LOOP]]20; CHECK: bb1:21; CHECK-NEXT: br label [[EXIT]]22; CHECK: exit:23; CHECK-NEXT: [[RETVAL:%.*]] = phi i32 [ 0, [[BB1:%.*]] ], [ [[SHIFTED_IV]], [[LOOP]] ]24; CHECK-NEXT: ret i32 [[RETVAL]]25;26entry:27 br label %loop28 29loop: ; preds = %do.shift, %entry30 %iv = phi i32 [ 127, %entry ], [ %iv.next, %do.shift ]31 %shifted.iv = phi i32 [ 0, %entry ], [ %shift, %do.shift ]32 %iv.next = add i32 %iv, 133 %loop_cond = icmp sgt i32 %iv, 12734 br i1 %loop_cond, label %exit, label %do.shift35 36do.shift: ; preds = %loop37 %shift = ashr i32 %iv, %arg38 br label %loop39 40bb1: ; No predecessors!41 br label %exit42 43exit: ; preds = %loop, %bb144 %retval = phi i32 [ 0, %bb1 ], [ %shifted.iv, %loop ]45 ret i32 %retval46}47