1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; RUN: opt < %s -passes=memcpyopt -S -verify-memoryssa | FileCheck %s 3; 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 earlier 8; 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 4 14; CHECK-NEXT: [[S:%.*]] = alloca [10 x i32], align 4 15; 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 4 17; CHECK-NEXT: [[SCEVGEP:%.*]] = getelementptr [10 x i32], ptr [[S]], i64 0, i64 1 18; 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.memcpy.p0.p0.i64(ptr align 4 [[A]], ptr align 4 [[SCEVGEP]], i64 4, i1 false) 23; CHECK-NEXT: [[TMP2:%.*]] = load i32, ptr [[A]], align 4 24; 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 %a 31 %scevgep = getelementptr [10 x i32], ptr %s, i64 0, i64 1 32 br i1 %z, label %for.body3.lr.ph, label %for.inc7.1 33 34for.body3.lr.ph: ; preds = %entry 35 call void @llvm.memcpy.p0.p0.i64(ptr align 4 %a, ptr align 4 %scevgep, i64 17179869180, i1 false) 36 br label %for.inc7.1 37 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 %a 41 ret i32 %0 42} 43 44declare void @llvm.memcpy.p0.p0.i64(ptr, ptr, i64, i1) 45declare void @llvm.memset.p0.i64(ptr, i8, i64, i1) 46