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1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py2; RUN: opt -passes=loop-idiom -S %s | FileCheck %s3 4target datalayout = "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"5target triple = "x86_64-apple-macosx11.0.0"6 7; Make sure the number of bytes is computed correctly in the presence of zero8; extensions and preserved add flags.9define void @test(ptr %ptr) {10; CHECK-LABEL: @test(11; CHECK-NEXT: entry:12; CHECK-NEXT: br label [[FOR_BODY_PREHEADER:%.*]]13; CHECK: dead:14; CHECK-NEXT: br label [[FOR_BODY_PREHEADER]]15; CHECK: for.body.preheader:16; CHECK-NEXT: [[LIM_0:%.*]] = phi i32 [ 65, [[ENTRY:%.*]] ], [ 1, [[DEAD:%.*]] ]17; CHECK-NEXT: [[SCEVGEP:%.*]] = getelementptr i8, ptr [[PTR:%.*]], i64 818; CHECK-NEXT: [[UMAX:%.*]] = call i32 @llvm.umax.i32(i32 [[LIM_0]], i32 2)19; CHECK-NEXT: [[TMP2:%.*]] = shl nuw nsw i32 [[UMAX]], 320; CHECK-NEXT: [[TMP0:%.*]] = add nsw i32 [[TMP2]], -821; CHECK-NEXT: [[TMP1:%.*]] = zext nneg i32 [[TMP0]] to i6422; CHECK-NEXT: call void @llvm.memset.p0.i64(ptr align 8 [[SCEVGEP]], i8 0, i64 [[TMP1]], i1 false)23; CHECK-NEXT: br label [[FOR_BODY:%.*]]24; CHECK: for.body:25; CHECK-NEXT: [[IV:%.*]] = phi i32 [ [[IV_NEXT:%.*]], [[FOR_BODY]] ], [ 1, [[FOR_BODY_PREHEADER]] ]26; CHECK-NEXT: [[IV_EXT:%.*]] = zext i32 [[IV]] to i6427; CHECK-NEXT: [[GEP:%.*]] = getelementptr inbounds i64, ptr [[PTR]], i64 [[IV_EXT]]28; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i32 [[IV]], 129; CHECK-NEXT: [[CMP64:%.*]] = icmp ult i32 [[IV_NEXT]], [[LIM_0]]30; CHECK-NEXT: br i1 [[CMP64]], label [[FOR_BODY]], label [[EXIT:%.*]]31; CHECK: exit:32; CHECK-NEXT: ret void33;34entry:35 br label %for.body.preheader36 37dead:38 br label %for.body.preheader39 40for.body.preheader:41 %lim.0 = phi i32 [ 65, %entry ], [ 1, %dead ]42 br label %for.body43 44for.body:45 %iv = phi i32 [ %iv.next, %for.body ], [ 1, %for.body.preheader ]46 %iv.ext = zext i32 %iv to i6447 %gep = getelementptr inbounds i64, ptr %ptr, i64 %iv.ext48 store i64 0, ptr %gep, align 849 %iv.next = add nuw nsw i32 %iv, 150 %cmp64 = icmp ult i32 %iv.next, %lim.051 br i1 %cmp64, label %for.body, label %exit52 53exit:54 ret void55}56