| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt < %s -basic-aa -memcpyopt -S -verify-memoryssa | FileCheck %s |
| |
| target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128" |
| target triple = "x86_64-apple-macosx10.8.0" |
| |
| %struct.foo = type { i8, [7 x i8], i32 } |
| |
| ; Check that the memcpy is removed. |
| define i32 @test1(%struct.foo* nocapture %foobie) nounwind noinline ssp uwtable { |
| ; CHECK-LABEL: @test1( |
| ; CHECK-NEXT: [[BLETCH_SROA_1:%.*]] = alloca [7 x i8], align 1 |
| ; CHECK-NEXT: [[TMP1:%.*]] = getelementptr inbounds [[STRUCT_FOO:%.*]], %struct.foo* [[FOOBIE:%.*]], i64 0, i32 0 |
| ; CHECK-NEXT: store i8 98, i8* [[TMP1]], align 4 |
| ; CHECK-NEXT: [[TMP2:%.*]] = getelementptr inbounds [[STRUCT_FOO]], %struct.foo* [[FOOBIE]], i64 0, i32 1, i64 0 |
| ; CHECK-NEXT: [[TMP3:%.*]] = getelementptr inbounds [7 x i8], [7 x i8]* [[BLETCH_SROA_1]], i64 0, i64 0 |
| ; CHECK-NEXT: [[TMP4:%.*]] = getelementptr inbounds [[STRUCT_FOO]], %struct.foo* [[FOOBIE]], i64 0, i32 2 |
| ; CHECK-NEXT: store i32 20, i32* [[TMP4]], align 4 |
| ; CHECK-NEXT: ret i32 undef |
| ; |
| %bletch.sroa.1 = alloca [7 x i8], align 1 |
| %1 = getelementptr inbounds %struct.foo, %struct.foo* %foobie, i64 0, i32 0 |
| store i8 98, i8* %1, align 4 |
| %2 = getelementptr inbounds %struct.foo, %struct.foo* %foobie, i64 0, i32 1, i64 0 |
| %3 = getelementptr inbounds [7 x i8], [7 x i8]* %bletch.sroa.1, i64 0, i64 0 |
| call void @llvm.memcpy.p0i8.p0i8.i64(i8* %2, i8* %3, i64 7, i1 false) |
| %4 = getelementptr inbounds %struct.foo, %struct.foo* %foobie, i64 0, i32 2 |
| store i32 20, i32* %4, align 4 |
| ret i32 undef |
| } |
| |
| ; Check that the memcpy is removed. |
| define void @test2(i8* sret(i8) noalias nocapture %out, i8* %in) nounwind noinline ssp uwtable { |
| ; CHECK-LABEL: @test2( |
| ; CHECK-NEXT: call void @llvm.lifetime.start.p0i8(i64 8, i8* [[IN:%.*]]) |
| ; CHECK-NEXT: ret void |
| ; |
| call void @llvm.lifetime.start.p0i8(i64 8, i8* %in) |
| call void @llvm.memcpy.p0i8.p0i8.i64(i8* %out, i8* %in, i64 8, i1 false) |
| ret void |
| } |
| |
| ; Check that the memcpy is not removed. |
| define void @test3(i8* sret(i8) noalias nocapture %out, i8* %in) nounwind noinline ssp uwtable { |
| ; CHECK-LABEL: @test3( |
| ; CHECK-NEXT: call void @llvm.lifetime.start.p0i8(i64 4, i8* [[IN:%.*]]) |
| ; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* [[OUT:%.*]], i8* [[IN]], i64 8, i1 false) |
| ; CHECK-NEXT: ret void |
| ; |
| call void @llvm.lifetime.start.p0i8(i64 4, i8* %in) |
| call void @llvm.memcpy.p0i8.p0i8.i64(i8* %out, i8* %in, i64 8, i1 false) |
| ret void |
| } |
| |
| ; Check that the memcpy is not removed. |
| define void @test_lifetime_may_alias(i8* %lifetime, i8* %src, i8* %dst) { |
| ; CHECK-LABEL: @test_lifetime_may_alias( |
| ; CHECK-NEXT: call void @llvm.lifetime.start.p0i8(i64 8, i8* [[LIFETIME:%.*]]) |
| ; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* [[DST:%.*]], i8* [[SRC:%.*]], i64 8, i1 false) |
| ; CHECK-NEXT: ret void |
| ; |
| call void @llvm.lifetime.start.p0i8(i64 8, i8* %lifetime) |
| call void @llvm.memcpy.p0i8.p0i8.i64(i8* %dst, i8* %src, i64 8, i1 false) |
| ret void |
| } |
| |
| ; lifetime.start on full alloca size, copy in range. |
| define void @test_lifetime_partial_alias_1(i8* noalias %dst) { |
| ; CHECK-LABEL: @test_lifetime_partial_alias_1( |
| ; CHECK-NEXT: [[A:%.*]] = alloca [16 x i8], align 1 |
| ; CHECK-NEXT: [[A_I8:%.*]] = bitcast [16 x i8]* [[A]] to i8* |
| ; CHECK-NEXT: call void @llvm.lifetime.start.p0i8(i64 16, i8* [[A_I8]]) |
| ; CHECK-NEXT: [[GEP:%.*]] = getelementptr i8, i8* [[A_I8]], i64 8 |
| ; CHECK-NEXT: ret void |
| ; |
| %a = alloca [16 x i8] |
| %a.i8 = bitcast [16 x i8]* %a to i8* |
| call void @llvm.lifetime.start.p0i8(i64 16, i8* %a.i8) |
| %gep = getelementptr i8, i8* %a.i8, i64 8 |
| call void @llvm.memcpy.p0i8.p0i8.i64(i8* %dst, i8* %gep, i64 8, i1 false) |
| ret void |
| } |
| |
| ; lifetime.start on full alloca size, copy out of range. |
| define void @test_lifetime_partial_alias_2(i8* noalias %dst) { |
| ; CHECK-LABEL: @test_lifetime_partial_alias_2( |
| ; CHECK-NEXT: [[A:%.*]] = alloca [16 x i8], align 1 |
| ; CHECK-NEXT: [[A_I8:%.*]] = bitcast [16 x i8]* [[A]] to i8* |
| ; CHECK-NEXT: call void @llvm.lifetime.start.p0i8(i64 16, i8* [[A_I8]]) |
| ; CHECK-NEXT: [[GEP:%.*]] = getelementptr i8, i8* [[A_I8]], i64 8 |
| ; CHECK-NEXT: ret void |
| ; |
| %a = alloca [16 x i8] |
| %a.i8 = bitcast [16 x i8]* %a to i8* |
| call void @llvm.lifetime.start.p0i8(i64 16, i8* %a.i8) |
| %gep = getelementptr i8, i8* %a.i8, i64 8 |
| call void @llvm.memcpy.p0i8.p0i8.i64(i8* %dst, i8* %gep, i64 16, i1 false) |
| ret void |
| } |
| |
| ; lifetime.start on part of alloca, copy in range. |
| define void @test_lifetime_partial_alias_3(i8* noalias %dst) { |
| ; CHECK-LABEL: @test_lifetime_partial_alias_3( |
| ; CHECK-NEXT: [[A:%.*]] = alloca [16 x i8], align 1 |
| ; CHECK-NEXT: [[A_I8:%.*]] = bitcast [16 x i8]* [[A]] to i8* |
| ; CHECK-NEXT: call void @llvm.lifetime.start.p0i8(i64 12, i8* [[A_I8]]) |
| ; CHECK-NEXT: [[GEP:%.*]] = getelementptr i8, i8* [[A_I8]], i64 8 |
| ; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* [[DST:%.*]], i8* [[GEP]], i64 4, i1 false) |
| ; CHECK-NEXT: ret void |
| ; |
| %a = alloca [16 x i8] |
| %a.i8 = bitcast [16 x i8]* %a to i8* |
| call void @llvm.lifetime.start.p0i8(i64 12, i8* %a.i8) |
| %gep = getelementptr i8, i8* %a.i8, i64 8 |
| call void @llvm.memcpy.p0i8.p0i8.i64(i8* %dst, i8* %gep, i64 4, i1 false) |
| ret void |
| } |
| |
| ; lifetime.start on part of alloca, copy out of range. |
| define void @test_lifetime_partial_alias_4(i8* noalias %dst) { |
| ; CHECK-LABEL: @test_lifetime_partial_alias_4( |
| ; CHECK-NEXT: [[A:%.*]] = alloca [16 x i8], align 1 |
| ; CHECK-NEXT: [[A_I8:%.*]] = bitcast [16 x i8]* [[A]] to i8* |
| ; CHECK-NEXT: call void @llvm.lifetime.start.p0i8(i64 12, i8* [[A_I8]]) |
| ; CHECK-NEXT: [[GEP:%.*]] = getelementptr i8, i8* [[A_I8]], i64 8 |
| ; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* [[DST:%.*]], i8* [[GEP]], i64 8, i1 false) |
| ; CHECK-NEXT: ret void |
| ; |
| %a = alloca [16 x i8] |
| %a.i8 = bitcast [16 x i8]* %a to i8* |
| call void @llvm.lifetime.start.p0i8(i64 12, i8* %a.i8) |
| %gep = getelementptr i8, i8* %a.i8, i64 8 |
| call void @llvm.memcpy.p0i8.p0i8.i64(i8* %dst, i8* %gep, i64 8, i1 false) |
| ret void |
| } |
| |
| declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i1) nounwind |
| |
| declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture) nounwind |