46 lines · plain
1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py2; RUN: opt < %s -passes=memcpyopt -S -verify-memoryssa | FileCheck %s3; Handle memcpy-memcpy dependencies of differing sizes correctly.4 5target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"6 7; Don't delete the second memcpy, even though there's an earlier8; memcpy with a larger size from the same address.9 10define i32 @foo(i1 %z) {11; CHECK-LABEL: @foo(12; CHECK-NEXT: entry:13; CHECK-NEXT: [[A:%.*]] = alloca [10 x i32], align 414; CHECK-NEXT: [[S:%.*]] = alloca [10 x i32], align 415; CHECK-NEXT: call void @llvm.memset.p0.i64(ptr nonnull align 16 [[S]], i8 0, i64 40, i1 false)16; CHECK-NEXT: store i32 1, ptr [[A]], align 417; CHECK-NEXT: [[SCEVGEP:%.*]] = getelementptr [10 x i32], ptr [[S]], i64 0, i64 118; CHECK-NEXT: br i1 [[Z:%.*]], label [[FOR_BODY3_LR_PH:%.*]], label [[FOR_INC7_1:%.*]]19; CHECK: for.body3.lr.ph:20; CHECK-NEXT: br label [[FOR_INC7_1]]21; CHECK: for.inc7.1:22; CHECK-NEXT: call void @llvm.memset.p0.i64(ptr align 4 [[A]], i8 0, i64 4, i1 false)23; CHECK-NEXT: [[TMP2:%.*]] = load i32, ptr [[A]], align 424; CHECK-NEXT: ret i32 [[TMP2]]25;26entry:27 %a = alloca [10 x i32]28 %s = alloca [10 x i32]29 call void @llvm.memset.p0.i64(ptr nonnull align 16 %s, i8 0, i64 40, i1 false)30 store i32 1, ptr %a31 %scevgep = getelementptr [10 x i32], ptr %s, i64 0, i64 132 br i1 %z, label %for.body3.lr.ph, label %for.inc7.133 34for.body3.lr.ph: ; preds = %entry35 call void @llvm.memcpy.p0.p0.i64(ptr align 4 %a, ptr align 4 %scevgep, i64 17179869180, i1 false)36 br label %for.inc7.137 38for.inc7.1:39 call void @llvm.memcpy.p0.p0.i64(ptr align 4 %a, ptr align 4 %scevgep, i64 4, i1 false)40 %0 = load i32, ptr %a41 ret i32 %042}43 44declare void @llvm.memcpy.p0.p0.i64(ptr, ptr, i64, i1)45declare void @llvm.memset.p0.i64(ptr, i8, i64, i1)46