| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt < %s -memcpyopt -S -verify-memoryssa | FileCheck %s |
| ; Handle memcpy-memcpy dependencies of differing sizes correctly. |
| |
| target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" |
| |
| ; Don't delete the second memcpy, even though there's an earlier |
| ; memcpy with a larger size from the same address. |
| |
| define i32 @foo(i1 %z) { |
| ; CHECK-LABEL: @foo( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[A:%.*]] = alloca [10 x i32], align 4 |
| ; CHECK-NEXT: [[S:%.*]] = alloca [10 x i32], align 4 |
| ; CHECK-NEXT: [[TMP0:%.*]] = bitcast [10 x i32]* [[A]] to i8* |
| ; CHECK-NEXT: [[TMP1:%.*]] = bitcast [10 x i32]* [[S]] to i8* |
| ; CHECK-NEXT: call void @llvm.memset.p0i8.i64(i8* nonnull align 16 [[TMP1]], i8 0, i64 40, i1 false) |
| ; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds [10 x i32], [10 x i32]* [[A]], i64 0, i64 0 |
| ; CHECK-NEXT: store i32 1, i32* [[ARRAYIDX]], align 4 |
| ; CHECK-NEXT: [[SCEVGEP:%.*]] = getelementptr [10 x i32], [10 x i32]* [[S]], i64 0, i64 1 |
| ; CHECK-NEXT: [[SCEVGEP7:%.*]] = bitcast i32* [[SCEVGEP]] to i8* |
| ; CHECK-NEXT: br i1 [[Z:%.*]], label [[FOR_BODY3_LR_PH:%.*]], label [[FOR_INC7_1:%.*]] |
| ; CHECK: for.body3.lr.ph: |
| ; CHECK-NEXT: br label [[FOR_INC7_1]] |
| ; CHECK: for.inc7.1: |
| ; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 4 [[TMP0]], i8* align 4 [[SCEVGEP7]], i64 4, i1 false) |
| ; CHECK-NEXT: [[TMP2:%.*]] = load i32, i32* [[ARRAYIDX]], align 4 |
| ; CHECK-NEXT: ret i32 [[TMP2]] |
| ; |
| entry: |
| %a = alloca [10 x i32] |
| %s = alloca [10 x i32] |
| %0 = bitcast [10 x i32]* %a to i8* |
| %1 = bitcast [10 x i32]* %s to i8* |
| call void @llvm.memset.p0i8.i64(i8* nonnull align 16 %1, i8 0, i64 40, i1 false) |
| %arrayidx = getelementptr inbounds [10 x i32], [10 x i32]* %a, i64 0, i64 0 |
| store i32 1, i32* %arrayidx |
| %scevgep = getelementptr [10 x i32], [10 x i32]* %s, i64 0, i64 1 |
| %scevgep7 = bitcast i32* %scevgep to i8* |
| br i1 %z, label %for.body3.lr.ph, label %for.inc7.1 |
| |
| for.body3.lr.ph: ; preds = %entry |
| call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 4 %0, i8* align 4 %scevgep7, i64 17179869180, i1 false) |
| br label %for.inc7.1 |
| |
| for.inc7.1: |
| call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 4 %0, i8* align 4 %scevgep7, i64 4, i1 false) |
| %2 = load i32, i32* %arrayidx |
| ret i32 %2 |
| } |
| |
| declare void @llvm.memcpy.p0i8.p0i8.i64(i8*, i8*, i64, i1) |
| declare void @llvm.memset.p0i8.i64(i8*, i8, i64, i1) |