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1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 52; RUN: opt -p loop-idiom -S %s | FileCheck %s3 4target datalayout = "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-n32:64-S128-Fn32"5 6define void @test_simplify_scev_during_expansion_flags(i64 %start) {7; CHECK-LABEL: define void @test_simplify_scev_during_expansion_flags(8; CHECK-SAME: i64 [[START:%.*]]) {9; CHECK-NEXT: [[ENTRY:.*]]:10; CHECK-NEXT: [[START_NEG:%.*]] = sub i64 0, [[START]]11; CHECK-NEXT: [[START_MUL:%.*]] = ashr exact i64 [[START_NEG]], 212; CHECK-NEXT: [[TMP0:%.*]] = shl nsw i64 [[START_MUL]], 213; CHECK-NEXT: [[TMP1:%.*]] = sub i64 404, [[TMP0]]14; CHECK-NEXT: call void @llvm.memset.p0.i64(ptr align 4 null, i8 0, i64 [[TMP1]], i1 false)15; CHECK-NEXT: br label %[[LOOP:.*]]16; CHECK: [[LOOP]]:17; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[START_MUL]], %[[ENTRY]] ], [ [[IV_NEXT:%.*]], %[[LOOP]] ]18; CHECK-NEXT: [[PTR_IV:%.*]] = phi ptr [ null, %[[ENTRY]] ], [ [[PTR_IV_NEXT:%.*]], %[[LOOP]] ]19; CHECK-NEXT: [[PTR_IV_NEXT]] = getelementptr i8, ptr [[PTR_IV]], i64 420; CHECK-NEXT: [[IV_NEXT]] = add i64 [[IV]], 121; CHECK-NEXT: [[EC:%.*]] = icmp eq i64 [[IV]], 10022; CHECK-NEXT: br i1 [[EC]], label %[[EXIT:.*]], label %[[LOOP]]23; CHECK: [[EXIT]]:24; CHECK-NEXT: ret void25;26entry:27 %start.neg = sub i64 0, %start28 %start.mul = ashr exact i64 %start.neg, 229 br label %loop30 31loop:32 %iv = phi i64 [ %start.mul, %entry ], [ %iv.next, %loop ]33 %ptr.iv = phi ptr [ null, %entry ], [ %ptr.iv.next, %loop ]34 store i32 0, ptr %ptr.iv, align 435 %ptr.iv.next = getelementptr i8, ptr %ptr.iv, i64 436 %iv.next = add i64 %iv, 137 %ec = icmp eq i64 %iv, 10038 br i1 %ec, label %exit, label %loop39 40exit:41 ret void42}43