| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt < %s -S -inferattrs -basic-aa -dse | FileCheck %s |
| ; RUN: opt < %s -S -aa-pipeline=basic-aa -passes=inferattrs,dse | FileCheck %s |
| |
| target triple = "x86_64-unknown-linux-gnu" |
| |
| declare i8* @strcpy(i8* %dest, i8* %src) nounwind |
| define void @test1(i8* %src) { |
| ; CHECK-LABEL: @test1( |
| ; CHECK-NEXT: ret void |
| ; |
| %B = alloca [16 x i8] |
| %dest = getelementptr inbounds [16 x i8], [16 x i8]* %B, i64 0, i64 0 |
| %call = call i8* @strcpy(i8* %dest, i8* %src) |
| ret void |
| } |
| |
| declare i8* @strncpy(i8* %dest, i8* %src, i64 %n) nounwind |
| define void @test2(i8* %src) { |
| ; CHECK-LABEL: @test2( |
| ; CHECK-NEXT: ret void |
| ; |
| %B = alloca [16 x i8] |
| %dest = getelementptr inbounds [16 x i8], [16 x i8]* %B, i64 0, i64 0 |
| %call = call i8* @strncpy(i8* %dest, i8* %src, i64 12) |
| ret void |
| } |
| |
| declare i8* @strcat(i8* %dest, i8* %src) nounwind |
| define void @test3(i8* %src) { |
| ; CHECK-LABEL: @test3( |
| ; CHECK-NEXT: ret void |
| ; |
| %B = alloca [16 x i8] |
| %dest = getelementptr inbounds [16 x i8], [16 x i8]* %B, i64 0, i64 0 |
| %call = call i8* @strcat(i8* %dest, i8* %src) |
| ret void |
| } |
| |
| define void @test_strcat_with_lifetime(i8* %src) { |
| ; CHECK-LABEL: @test_strcat_with_lifetime( |
| ; CHECK-NEXT: [[B:%.*]] = alloca [16 x i8], align 1 |
| ; CHECK-NEXT: [[B_CAST:%.*]] = bitcast [16 x i8]* [[B]] to i8* |
| ; CHECK-NEXT: call void @llvm.lifetime.start.p0i8(i64 16, i8* nonnull [[B_CAST]]) |
| ; CHECK-NEXT: call void @llvm.lifetime.end.p0i8(i64 16, i8* nonnull [[B_CAST]]) |
| ; CHECK-NEXT: ret void |
| ; |
| %B = alloca [16 x i8] |
| %B.cast = bitcast [16 x i8]* %B to i8* |
| call void @llvm.lifetime.start.p0i8(i64 16, i8* nonnull %B.cast) |
| %dest = getelementptr inbounds [16 x i8], [16 x i8]* %B, i64 0, i64 0 |
| %call = call i8* @strcat(i8* %dest, i8* %src) |
| call void @llvm.lifetime.end.p0i8(i64 16, i8* nonnull %B.cast) |
| ret void |
| } |
| |
| define void @test_strcat_with_lifetime_nonlocal(i8* %dest, i8* %src) { |
| ; CHECK-LABEL: @test_strcat_with_lifetime_nonlocal( |
| ; CHECK-NEXT: call void @llvm.lifetime.start.p0i8(i64 16, i8* nonnull [[DEST:%.*]]) |
| ; CHECK-NEXT: [[CALL:%.*]] = call i8* @strcat(i8* [[DEST]], i8* [[SRC:%.*]]) |
| ; CHECK-NEXT: call void @llvm.lifetime.end.p0i8(i64 16, i8* nonnull [[DEST]]) |
| ; CHECK-NEXT: ret void |
| ; |
| call void @llvm.lifetime.start.p0i8(i64 16, i8* nonnull %dest) |
| %call = call i8* @strcat(i8* %dest, i8* %src) |
| call void @llvm.lifetime.end.p0i8(i64 16, i8* nonnull %dest) |
| ret void |
| } |
| |
| declare i8* @strncat(i8* %dest, i8* %src, i64 %n) nounwind |
| define void @test4(i8* %src) { |
| ; CHECK-LABEL: @test4( |
| ; CHECK-NEXT: ret void |
| ; |
| %B = alloca [16 x i8] |
| %dest = getelementptr inbounds [16 x i8], [16 x i8]* %B, i64 0, i64 0 |
| %call = call i8* @strncat(i8* %dest, i8* %src, i64 12) |
| ret void |
| } |
| |
| define void @test5(i8* nocapture %src) { |
| ; CHECK-LABEL: @test5( |
| ; CHECK-NEXT: ret void |
| ; |
| %dest = alloca [100 x i8], align 16 |
| %arraydecay = getelementptr inbounds [100 x i8], [100 x i8]* %dest, i64 0, i64 0 |
| %call = call i8* @strcpy(i8* %arraydecay, i8* %src) |
| %arrayidx = getelementptr inbounds i8, i8* %call, i64 10 |
| store i8 97, i8* %arrayidx, align 1 |
| ret void |
| } |
| |
| declare void @user(i8* %p) |
| define void @test6(i8* %src) { |
| ; CHECK-LABEL: @test6( |
| ; CHECK-NEXT: [[B:%.*]] = alloca [16 x i8], align 1 |
| ; CHECK-NEXT: [[DEST:%.*]] = getelementptr inbounds [16 x i8], [16 x i8]* [[B]], i64 0, i64 0 |
| ; CHECK-NEXT: [[CALL:%.*]] = call i8* @strcpy(i8* [[DEST]], i8* [[SRC:%.*]]) |
| ; CHECK-NEXT: call void @user(i8* [[DEST]]) |
| ; CHECK-NEXT: ret void |
| ; |
| %B = alloca [16 x i8] |
| %dest = getelementptr inbounds [16 x i8], [16 x i8]* %B, i64 0, i64 0 |
| %call = call i8* @strcpy(i8* %dest, i8* %src) |
| call void @user(i8* %dest) |
| ret void |
| } |
| |
| declare i32 @memcmp(i8*, i8*, i64) |
| |
| define i32 @test_memcmp_const_size(i8* noalias %foo) { |
| ; CHECK-LABEL: @test_memcmp_const_size( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[STACK:%.*]] = alloca [10 x i8], align 1 |
| ; CHECK-NEXT: [[STACK_PTR:%.*]] = bitcast [10 x i8]* [[STACK]] to i8* |
| ; CHECK-NEXT: store i8 49, i8* [[STACK_PTR]], align 1 |
| ; CHECK-NEXT: [[GEP_1:%.*]] = getelementptr i8, i8* [[STACK_PTR]], i64 1 |
| ; CHECK-NEXT: store i8 50, i8* [[GEP_1]], align 1 |
| ; CHECK-NEXT: [[RES:%.*]] = call i32 @memcmp(i8* nonnull dereferenceable(2) [[FOO:%.*]], i8* nonnull dereferenceable(2) [[STACK_PTR]], i64 2) |
| ; CHECK-NEXT: ret i32 [[RES]] |
| ; |
| entry: |
| %stack = alloca [10 x i8] |
| %stack.ptr = bitcast [10 x i8]* %stack to i8* |
| store i8 49, i8* %stack.ptr, align 1 |
| %gep.1 = getelementptr i8, i8* %stack.ptr, i64 1 |
| store i8 50, i8* %gep.1, align 1 |
| %gep.2 = getelementptr i8, i8* %stack.ptr, i64 2 |
| store i8 51, i8* %gep.2, align 1 |
| %gep.3 = getelementptr i8, i8* %stack.ptr, i64 3 |
| store i8 52, i8* %gep.3, align 1 |
| %res = call i32 @memcmp(i8* nonnull dereferenceable(2) %foo, i8* nonnull dereferenceable(2) %stack.ptr, i64 2) |
| ret i32 %res |
| } |
| |
| define i32 @test_memcmp_variable_size(i8* noalias %foo, i64 %n) { |
| ; CHECK-LABEL: @test_memcmp_variable_size( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[STACK:%.*]] = alloca [10 x i8], align 1 |
| ; CHECK-NEXT: [[STACK_PTR:%.*]] = bitcast [10 x i8]* [[STACK]] to i8* |
| ; CHECK-NEXT: store i8 49, i8* [[STACK_PTR]], align 1 |
| ; CHECK-NEXT: [[GEP_1:%.*]] = getelementptr i8, i8* [[STACK_PTR]], i64 1 |
| ; CHECK-NEXT: store i8 50, i8* [[GEP_1]], align 1 |
| ; CHECK-NEXT: [[GEP_2:%.*]] = getelementptr i8, i8* [[STACK_PTR]], i64 2 |
| ; CHECK-NEXT: store i8 51, i8* [[GEP_2]], align 1 |
| ; CHECK-NEXT: [[GEP_3:%.*]] = getelementptr i8, i8* [[STACK_PTR]], i64 3 |
| ; CHECK-NEXT: store i8 52, i8* [[GEP_3]], align 1 |
| ; CHECK-NEXT: [[RES:%.*]] = call i32 @memcmp(i8* nonnull [[FOO:%.*]], i8* nonnull [[STACK_PTR]], i64 [[N:%.*]]) |
| ; CHECK-NEXT: ret i32 [[RES]] |
| ; |
| entry: |
| %stack = alloca [10 x i8] |
| %stack.ptr = bitcast [10 x i8]* %stack to i8* |
| store i8 49, i8* %stack.ptr, align 1 |
| %gep.1 = getelementptr i8, i8* %stack.ptr, i64 1 |
| store i8 50, i8* %gep.1, align 1 |
| %gep.2 = getelementptr i8, i8* %stack.ptr, i64 2 |
| store i8 51, i8* %gep.2, align 1 |
| %gep.3 = getelementptr i8, i8* %stack.ptr, i64 3 |
| store i8 52, i8* %gep.3, align 1 |
| %res = call i32 @memcmp(i8* nonnull %foo, i8* nonnull %stack.ptr, i64 %n) |
| ret i32 %res |
| } |
| |
| declare i32 @bcmp(i8*, i8*, i64) |
| |
| define i1 @test_bcmp_const_size(i8* noalias %foo) { |
| ; CHECK-LABEL: @test_bcmp_const_size( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[STACK:%.*]] = alloca [10 x i8], align 1 |
| ; CHECK-NEXT: [[STACK_PTR:%.*]] = bitcast [10 x i8]* [[STACK]] to i8* |
| ; CHECK-NEXT: store i8 49, i8* [[STACK_PTR]], align 1 |
| ; CHECK-NEXT: [[GEP_1:%.*]] = getelementptr i8, i8* [[STACK_PTR]], i64 1 |
| ; CHECK-NEXT: store i8 50, i8* [[GEP_1]], align 1 |
| ; CHECK-NEXT: [[CALL:%.*]] = call i32 @bcmp(i8* nonnull dereferenceable(2) [[FOO:%.*]], i8* nonnull dereferenceable(2) [[STACK_PTR]], i64 2) |
| ; CHECK-NEXT: [[RES:%.*]] = icmp eq i32 [[CALL]], 0 |
| ; CHECK-NEXT: ret i1 [[RES]] |
| ; |
| entry: |
| %stack = alloca [10 x i8] |
| %stack.ptr = bitcast [10 x i8]* %stack to i8* |
| store i8 49, i8* %stack.ptr, align 1 |
| %gep.1 = getelementptr i8, i8* %stack.ptr, i64 1 |
| store i8 50, i8* %gep.1, align 1 |
| %gep.2 = getelementptr i8, i8* %stack.ptr, i64 2 |
| store i8 51, i8* %gep.2, align 1 |
| %gep.3 = getelementptr i8, i8* %stack.ptr, i64 3 |
| store i8 52, i8* %gep.3, align 1 |
| %call = call i32 @bcmp(i8* nonnull dereferenceable(2) %foo, i8* nonnull dereferenceable(2) %stack.ptr, i64 2) |
| %res = icmp eq i32 %call, 0 |
| ret i1 %res |
| } |
| |
| define i1 @test_bcmp_variable_size(i8* noalias %foo, i64 %n) { |
| ; CHECK-LABEL: @test_bcmp_variable_size( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[STACK:%.*]] = alloca [10 x i8], align 1 |
| ; CHECK-NEXT: [[STACK_PTR:%.*]] = bitcast [10 x i8]* [[STACK]] to i8* |
| ; CHECK-NEXT: store i8 49, i8* [[STACK_PTR]], align 1 |
| ; CHECK-NEXT: [[GEP_1:%.*]] = getelementptr i8, i8* [[STACK_PTR]], i64 1 |
| ; CHECK-NEXT: store i8 50, i8* [[GEP_1]], align 1 |
| ; CHECK-NEXT: [[GEP_2:%.*]] = getelementptr i8, i8* [[STACK_PTR]], i64 2 |
| ; CHECK-NEXT: store i8 51, i8* [[GEP_2]], align 1 |
| ; CHECK-NEXT: [[GEP_3:%.*]] = getelementptr i8, i8* [[STACK_PTR]], i64 3 |
| ; CHECK-NEXT: store i8 52, i8* [[GEP_3]], align 1 |
| ; CHECK-NEXT: [[CALL:%.*]] = call i32 @bcmp(i8* nonnull [[FOO:%.*]], i8* nonnull [[STACK_PTR]], i64 [[N:%.*]]) |
| ; CHECK-NEXT: [[RES:%.*]] = icmp eq i32 [[CALL]], 0 |
| ; CHECK-NEXT: ret i1 [[RES]] |
| ; |
| entry: |
| %stack = alloca [10 x i8] |
| %stack.ptr = bitcast [10 x i8]* %stack to i8* |
| store i8 49, i8* %stack.ptr, align 1 |
| %gep.1 = getelementptr i8, i8* %stack.ptr, i64 1 |
| store i8 50, i8* %gep.1, align 1 |
| %gep.2 = getelementptr i8, i8* %stack.ptr, i64 2 |
| store i8 51, i8* %gep.2, align 1 |
| %gep.3 = getelementptr i8, i8* %stack.ptr, i64 3 |
| store i8 52, i8* %gep.3, align 1 |
| %call = call i32 @bcmp(i8* nonnull %foo, i8* nonnull %stack.ptr, i64 %n) |
| %res = icmp eq i32 %call, 0 |
| ret i1 %res |
| } |
| |
| declare i8* @memchr(i8*, i32, i64) |
| |
| define i8* @test_memchr_const_size() { |
| ; CHECK-LABEL: @test_memchr_const_size( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[STACK:%.*]] = alloca [10 x i8], align 1 |
| ; CHECK-NEXT: [[STACK_PTR:%.*]] = bitcast [10 x i8]* [[STACK]] to i8* |
| ; CHECK-NEXT: store i8 49, i8* [[STACK_PTR]], align 1 |
| ; CHECK-NEXT: [[GEP_1:%.*]] = getelementptr i8, i8* [[STACK_PTR]], i64 1 |
| ; CHECK-NEXT: store i8 50, i8* [[GEP_1]], align 1 |
| ; CHECK-NEXT: [[CALL:%.*]] = call i8* @memchr(i8* [[STACK_PTR]], i32 42, i64 2) |
| ; CHECK-NEXT: ret i8* [[CALL]] |
| ; |
| entry: |
| %stack = alloca [10 x i8] |
| %stack.ptr = bitcast [10 x i8]* %stack to i8* |
| store i8 49, i8* %stack.ptr, align 1 |
| %gep.1 = getelementptr i8, i8* %stack.ptr, i64 1 |
| store i8 50, i8* %gep.1, align 1 |
| %gep.2 = getelementptr i8, i8* %stack.ptr, i64 2 |
| store i8 51, i8* %gep.2, align 1 |
| %gep.3 = getelementptr i8, i8* %stack.ptr, i64 3 |
| store i8 52, i8* %gep.3, align 1 |
| %call = call i8* @memchr(i8* %stack.ptr, i32 42, i64 2) |
| ret i8* %call |
| } |
| |
| define i8* @test_memchr_variable_size(i64 %n) { |
| ; CHECK-LABEL: @test_memchr_variable_size( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[STACK:%.*]] = alloca [10 x i8], align 1 |
| ; CHECK-NEXT: [[STACK_PTR:%.*]] = bitcast [10 x i8]* [[STACK]] to i8* |
| ; CHECK-NEXT: store i8 49, i8* [[STACK_PTR]], align 1 |
| ; CHECK-NEXT: [[GEP_1:%.*]] = getelementptr i8, i8* [[STACK_PTR]], i64 1 |
| ; CHECK-NEXT: store i8 50, i8* [[GEP_1]], align 1 |
| ; CHECK-NEXT: [[GEP_2:%.*]] = getelementptr i8, i8* [[STACK_PTR]], i64 2 |
| ; CHECK-NEXT: store i8 51, i8* [[GEP_2]], align 1 |
| ; CHECK-NEXT: [[GEP:%.*]] = getelementptr i8, i8* [[STACK_PTR]], i64 4 |
| ; CHECK-NEXT: store i8 52, i8* [[GEP]], align 1 |
| ; CHECK-NEXT: [[CALL:%.*]] = call i8* @memchr(i8* [[STACK_PTR]], i32 42, i64 [[N:%.*]]) |
| ; CHECK-NEXT: ret i8* [[CALL]] |
| ; |
| entry: |
| %stack = alloca [10 x i8] |
| %stack.ptr = bitcast [10 x i8]* %stack to i8* |
| store i8 49, i8* %stack.ptr, align 1 |
| %gep.1 = getelementptr i8, i8* %stack.ptr, i64 1 |
| store i8 50, i8* %gep.1, align 1 |
| %gep.2 = getelementptr i8, i8* %stack.ptr, i64 2 |
| store i8 51, i8* %gep.2, align 1 |
| %gep = getelementptr i8, i8* %stack.ptr, i64 4 |
| store i8 52, i8* %gep, align 1 |
| %call = call i8* @memchr(i8* %stack.ptr, i32 42, i64 %n) |
| ret i8* %call |
| } |
| |
| declare i8* @memccpy(i8*, i8*, i32, i64) |
| |
| define i8* @test_memccpy_const_size(i8* %foo) { |
| ; CHECK-LABEL: @test_memccpy_const_size( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[STACK:%.*]] = alloca [10 x i8], align 1 |
| ; CHECK-NEXT: [[STACK_PTR:%.*]] = bitcast [10 x i8]* [[STACK]] to i8* |
| ; CHECK-NEXT: store i8 49, i8* [[STACK_PTR]], align 1 |
| ; CHECK-NEXT: [[GEP_1:%.*]] = getelementptr i8, i8* [[STACK_PTR]], i64 1 |
| ; CHECK-NEXT: store i8 50, i8* [[GEP_1]], align 1 |
| ; CHECK-NEXT: [[RES:%.*]] = call i8* @memccpy(i8* [[FOO:%.*]], i8* [[STACK_PTR]], i32 42, i64 2) |
| ; CHECK-NEXT: ret i8* [[RES]] |
| ; |
| entry: |
| %stack = alloca [10 x i8] |
| %stack.ptr = bitcast [10 x i8]* %stack to i8* |
| store i8 49, i8* %stack.ptr, align 1 |
| %gep.1 = getelementptr i8, i8* %stack.ptr, i64 1 |
| store i8 50, i8* %gep.1, align 1 |
| %gep.2 = getelementptr i8, i8* %stack.ptr, i64 2 |
| store i8 51, i8* %gep.2, align 1 |
| %gep.3 = getelementptr i8, i8* %stack.ptr, i64 3 |
| store i8 52, i8* %gep.3, align 1 |
| %res = call i8* @memccpy(i8* %foo, i8* %stack.ptr, i32 42, i64 2) |
| ret i8* %res |
| } |
| |
| define i8* @test_memccpy_variable_size(i8* %foo, i64 %n) { |
| ; CHECK-LABEL: @test_memccpy_variable_size( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[STACK:%.*]] = alloca [10 x i8], align 1 |
| ; CHECK-NEXT: [[STACK_PTR:%.*]] = bitcast [10 x i8]* [[STACK]] to i8* |
| ; CHECK-NEXT: store i8 49, i8* [[STACK_PTR]], align 1 |
| ; CHECK-NEXT: [[GEP_1:%.*]] = getelementptr i8, i8* [[STACK_PTR]], i64 1 |
| ; CHECK-NEXT: store i8 50, i8* [[GEP_1]], align 1 |
| ; CHECK-NEXT: [[GEP_2:%.*]] = getelementptr i8, i8* [[STACK_PTR]], i64 2 |
| ; CHECK-NEXT: store i8 51, i8* [[GEP_2]], align 1 |
| ; CHECK-NEXT: [[GEP_3:%.*]] = getelementptr i8, i8* [[STACK_PTR]], i64 3 |
| ; CHECK-NEXT: store i8 52, i8* [[GEP_3]], align 1 |
| ; CHECK-NEXT: [[RES:%.*]] = call i8* @memccpy(i8* [[FOO:%.*]], i8* [[STACK_PTR]], i32 42, i64 [[N:%.*]]) |
| ; CHECK-NEXT: ret i8* [[RES]] |
| ; |
| entry: |
| %stack = alloca [10 x i8] |
| %stack.ptr = bitcast [10 x i8]* %stack to i8* |
| store i8 49, i8* %stack.ptr, align 1 |
| %gep.1 = getelementptr i8, i8* %stack.ptr, i64 1 |
| store i8 50, i8* %gep.1, align 1 |
| %gep.2 = getelementptr i8, i8* %stack.ptr, i64 2 |
| store i8 51, i8* %gep.2, align 1 |
| %gep.3 = getelementptr i8, i8* %stack.ptr, i64 3 |
| store i8 52, i8* %gep.3, align 1 |
| %res = call i8* @memccpy(i8* %foo, i8* %stack.ptr, i32 42, i64 %n) |
| ret i8* %res |
| } |
| |
| ; Make sure memccpy does not kill any stores, because it is not known how many |
| ; bytes are written. |
| define i8* @test_memccpy_const_size_does_not_kill_stores(i8* noalias %dest, i8* noalias %foo) { |
| ; CHECK-LABEL: @test_memccpy_const_size_does_not_kill_stores( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: store i8 49, i8* [[DEST:%.*]], align 1 |
| ; CHECK-NEXT: [[GEP_1:%.*]] = getelementptr i8, i8* [[DEST]], i64 1 |
| ; CHECK-NEXT: store i8 50, i8* [[GEP_1]], align 1 |
| ; CHECK-NEXT: [[GEP_2:%.*]] = getelementptr i8, i8* [[DEST]], i64 2 |
| ; CHECK-NEXT: store i8 51, i8* [[GEP_2]], align 1 |
| ; CHECK-NEXT: [[GEP_3:%.*]] = getelementptr i8, i8* [[DEST]], i64 3 |
| ; CHECK-NEXT: store i8 52, i8* [[GEP_3]], align 1 |
| ; CHECK-NEXT: [[RES:%.*]] = call i8* @memccpy(i8* [[DEST]], i8* [[FOO:%.*]], i32 42, i64 2) |
| ; CHECK-NEXT: ret i8* [[RES]] |
| ; |
| entry: |
| store i8 49, i8* %dest, align 1 |
| %gep.1 = getelementptr i8, i8* %dest, i64 1 |
| store i8 50, i8* %gep.1, align 1 |
| %gep.2 = getelementptr i8, i8* %dest, i64 2 |
| store i8 51, i8* %gep.2, align 1 |
| %gep.3 = getelementptr i8, i8* %dest, i64 3 |
| store i8 52, i8* %gep.3, align 1 |
| %res = call i8* @memccpy(i8* %dest, i8* %foo, i32 42, i64 2) |
| ret i8* %res |
| } |
| |
| define void @dse_strcpy(i8* nocapture readonly %src) { |
| ; CHECK-LABEL: @dse_strcpy( |
| ; CHECK-NEXT: [[A:%.*]] = alloca [256 x i8], align 16 |
| ; CHECK-NEXT: [[BUF:%.*]] = getelementptr inbounds [256 x i8], [256 x i8]* [[A]], i64 0, i64 0 |
| ; CHECK-NEXT: call void @llvm.lifetime.start.p0i8(i64 256, i8* nonnull [[BUF]]) |
| ; CHECK-NEXT: call void @llvm.lifetime.end.p0i8(i64 256, i8* nonnull [[BUF]]) |
| ; CHECK-NEXT: ret void |
| ; |
| %a = alloca [256 x i8], align 16 |
| %buf = getelementptr inbounds [256 x i8], [256 x i8]* %a, i64 0, i64 0 |
| call void @llvm.lifetime.start.p0i8(i64 256, i8* nonnull %buf) |
| call i8* @strcpy(i8* nonnull %buf, i8* nonnull dereferenceable(1) %src) |
| call void @llvm.lifetime.end.p0i8(i64 256, i8* nonnull %buf) |
| ret void |
| } |
| |
| define void @dse_strncpy(i8* nocapture readonly %src) { |
| ; CHECK-LABEL: @dse_strncpy( |
| ; CHECK-NEXT: [[A:%.*]] = alloca [256 x i8], align 16 |
| ; CHECK-NEXT: [[BUF:%.*]] = getelementptr inbounds [256 x i8], [256 x i8]* [[A]], i64 0, i64 0 |
| ; CHECK-NEXT: call void @llvm.lifetime.start.p0i8(i64 256, i8* nonnull [[BUF]]) |
| ; CHECK-NEXT: call void @llvm.lifetime.end.p0i8(i64 256, i8* nonnull [[BUF]]) |
| ; CHECK-NEXT: ret void |
| ; |
| %a = alloca [256 x i8], align 16 |
| %buf = getelementptr inbounds [256 x i8], [256 x i8]* %a, i64 0, i64 0 |
| call void @llvm.lifetime.start.p0i8(i64 256, i8* nonnull %buf) |
| call i8* @strncpy(i8* nonnull %buf, i8* nonnull dereferenceable(1) %src, i64 6) |
| call void @llvm.lifetime.end.p0i8(i64 256, i8* nonnull %buf) |
| ret void |
| } |
| |
| define void @dse_strcat(i8* nocapture readonly %src) { |
| ; CHECK-LABEL: @dse_strcat( |
| ; CHECK-NEXT: [[A:%.*]] = alloca [256 x i8], align 16 |
| ; CHECK-NEXT: [[BUF:%.*]] = getelementptr inbounds [256 x i8], [256 x i8]* [[A]], i64 0, i64 0 |
| ; CHECK-NEXT: call void @llvm.lifetime.start.p0i8(i64 256, i8* nonnull [[BUF]]) |
| ; CHECK-NEXT: call void @llvm.lifetime.end.p0i8(i64 256, i8* nonnull [[BUF]]) |
| ; CHECK-NEXT: ret void |
| ; |
| %a = alloca [256 x i8], align 16 |
| %buf = getelementptr inbounds [256 x i8], [256 x i8]* %a, i64 0, i64 0 |
| call void @llvm.lifetime.start.p0i8(i64 256, i8* nonnull %buf) |
| call i8* @strcat(i8* nonnull %buf, i8* nonnull dereferenceable(1) %src) |
| call void @llvm.lifetime.end.p0i8(i64 256, i8* nonnull %buf) |
| ret void |
| } |
| |
| define void @dse_strncat(i8* nocapture readonly %src) { |
| ; CHECK-LABEL: @dse_strncat( |
| ; CHECK-NEXT: [[A:%.*]] = alloca [256 x i8], align 16 |
| ; CHECK-NEXT: [[BUF:%.*]] = getelementptr inbounds [256 x i8], [256 x i8]* [[A]], i64 0, i64 0 |
| ; CHECK-NEXT: call void @llvm.lifetime.start.p0i8(i64 256, i8* nonnull [[BUF]]) |
| ; CHECK-NEXT: call void @llvm.lifetime.end.p0i8(i64 256, i8* nonnull [[BUF]]) |
| ; CHECK-NEXT: ret void |
| ; |
| %a = alloca [256 x i8], align 16 |
| %buf = getelementptr inbounds [256 x i8], [256 x i8]* %a, i64 0, i64 0 |
| call void @llvm.lifetime.start.p0i8(i64 256, i8* nonnull %buf) |
| call i8* @strncat(i8* nonnull %buf, i8* nonnull dereferenceable(1) %src, i64 6) |
| call void @llvm.lifetime.end.p0i8(i64 256, i8* nonnull %buf) |
| ret void |
| } |
| |
| declare void @llvm.lifetime.start.p0i8(i64 immarg, i8* nocapture) |
| declare void @llvm.lifetime.end.p0i8(i64 immarg, i8* nocapture) |
| |
| declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i1) nounwind |
| |
| ; Test that strncpy/memset overwriting each other is optimized out |
| |
| ; strncpy -> memset, full overwrite |
| define void @dse_strncpy_test1(i8* noalias %out, i8* noalias %in) { |
| ; CHECK-LABEL: @dse_strncpy_test1( |
| ; CHECK-NEXT: tail call void @llvm.memset.p0i8.i64(i8* [[OUT:%.*]], i8 42, i64 100, i1 false) |
| ; CHECK-NEXT: ret void |
| ; |
| %call = tail call i8* @strncpy(i8* %out, i8* %in, i64 100) |
| tail call void @llvm.memset.p0i8.i64(i8* %out, i8 42, i64 100, i1 false) |
| ret void |
| } |
| |
| declare i8* @__memset_chk(i8* writeonly, i32, i64, i64) argmemonly |
| |
| ; strncpy -> __memset_chk, full overwrite |
| define void @dse_strncpy_memset_chk_test1(i8* noalias %out, i8* noalias %in, i64 %n) { |
| ; CHECK-LABEL: @dse_strncpy_memset_chk_test1( |
| ; CHECK-NEXT: [[CALL:%.*]] = tail call i8* @strncpy(i8* [[OUT:%.*]], i8* [[IN:%.*]], i64 100) |
| ; CHECK-NEXT: [[CALL_2:%.*]] = tail call i8* @__memset_chk(i8* [[OUT]], i32 42, i64 100, i64 [[N:%.*]]) |
| ; CHECK-NEXT: ret void |
| ; |
| %call = tail call i8* @strncpy(i8* %out, i8* %in, i64 100) |
| %call.2 = tail call i8* @__memset_chk(i8* %out, i32 42, i64 100, i64 %n) |
| ret void |
| } |
| |
| ; strncpy -> memset, partial overwrite |
| define void @dse_strncpy_test2(i8* noalias %out, i8* noalias %in) { |
| ; CHECK-LABEL: @dse_strncpy_test2( |
| ; CHECK-NEXT: [[CALL:%.*]] = tail call i8* @strncpy(i8* [[OUT:%.*]], i8* [[IN:%.*]], i64 100) |
| ; CHECK-NEXT: tail call void @llvm.memset.p0i8.i64(i8* [[OUT]], i8 42, i64 99, i1 false) |
| ; CHECK-NEXT: ret void |
| ; |
| %call = tail call i8* @strncpy(i8* %out, i8* %in, i64 100) |
| tail call void @llvm.memset.p0i8.i64(i8* %out, i8 42, i64 99, i1 false) |
| ret void |
| } |
| |
| ; strncpy -> memset_chk, partial overwrite |
| define void @dse_strncpy_memset_chk_test2(i8* noalias %out, i8* noalias %in, i64 %n) { |
| ; CHECK-LABEL: @dse_strncpy_memset_chk_test2( |
| ; CHECK-NEXT: [[CALL:%.*]] = tail call i8* @strncpy(i8* [[OUT:%.*]], i8* [[IN:%.*]], i64 100) |
| ; CHECK-NEXT: [[CALL_2:%.*]] = tail call i8* @__memset_chk(i8* [[OUT]], i32 42, i64 99, i64 [[N:%.*]]) |
| ; CHECK-NEXT: ret void |
| ; |
| %call = tail call i8* @strncpy(i8* %out, i8* %in, i64 100) |
| %call.2 = tail call i8* @__memset_chk(i8* %out, i32 42, i64 99, i64 %n) |
| ret void |
| } |
| |
| ; strncpy -> memset, different destination |
| define void @dse_strncpy_test3(i8* noalias %out1, i8* noalias %out2, i8* noalias %in) { |
| ; CHECK-LABEL: @dse_strncpy_test3( |
| ; CHECK-NEXT: [[CALL:%.*]] = tail call i8* @strncpy(i8* [[OUT1:%.*]], i8* [[IN:%.*]], i64 100) |
| ; CHECK-NEXT: tail call void @llvm.memset.p0i8.i64(i8* [[OUT2:%.*]], i8 42, i64 100, i1 false) |
| ; CHECK-NEXT: ret void |
| ; |
| %call = tail call i8* @strncpy(i8* %out1, i8* %in, i64 100) |
| tail call void @llvm.memset.p0i8.i64(i8* %out2, i8 42, i64 100, i1 false) |
| ret void |
| } |
| |
| ; strncpy -> memset_chk, different destination |
| define void @dse_strncpy_chk_test3(i8* noalias %out1, i8* noalias %out2, i8* noalias %in, i64 %n) { |
| ; CHECK-LABEL: @dse_strncpy_chk_test3( |
| ; CHECK-NEXT: [[CALL:%.*]] = tail call i8* @strncpy(i8* [[OUT1:%.*]], i8* [[IN:%.*]], i64 100) |
| ; CHECK-NEXT: [[CALL_2:%.*]] = tail call i8* @__memset_chk(i8* [[OUT2:%.*]], i32 42, i64 100, i64 [[N:%.*]]) |
| ; CHECK-NEXT: ret void |
| ; |
| %call = tail call i8* @strncpy(i8* %out1, i8* %in, i64 100) |
| %call.2 = tail call i8* @__memset_chk(i8* %out2, i32 42, i64 100, i64 %n) |
| ret void |
| } |
| |
| ; memset -> strncpy, full overwrite |
| define void @dse_strncpy_test4(i8* noalias %out, i8* noalias %in) { |
| ; CHECK-LABEL: @dse_strncpy_test4( |
| ; CHECK-NEXT: [[CALL:%.*]] = tail call i8* @strncpy(i8* [[OUT:%.*]], i8* [[IN:%.*]], i64 100) |
| ; CHECK-NEXT: ret void |
| ; |
| tail call void @llvm.memset.p0i8.i64(i8* %out, i8 42, i64 100, i1 false) |
| %call = tail call i8* @strncpy(i8* %out, i8* %in, i64 100) |
| ret void |
| } |
| |
| ; memset -> strncpy, partial overwrite |
| define void @dse_strncpy_test5(i8* noalias %out, i8* noalias %in) { |
| ; CHECK-LABEL: @dse_strncpy_test5( |
| ; CHECK-NEXT: [[TMP1:%.*]] = getelementptr inbounds i8, i8* [[OUT:%.*]], i64 99 |
| ; CHECK-NEXT: tail call void @llvm.memset.p0i8.i64(i8* align 1 [[TMP1]], i8 42, i64 1, i1 false) |
| ; CHECK-NEXT: [[CALL:%.*]] = tail call i8* @strncpy(i8* [[OUT]], i8* [[IN:%.*]], i64 99) |
| ; CHECK-NEXT: ret void |
| ; |
| tail call void @llvm.memset.p0i8.i64(i8* %out, i8 42, i64 100, i1 false) |
| %call = tail call i8* @strncpy(i8* %out, i8* %in, i64 99) |
| ret void |
| } |
| |
| ; memset -> strncpy, different destination |
| define void @dse_strncpy_test6(i8* noalias %out1, i8* noalias %out2, i8* noalias %in) { |
| ; CHECK-LABEL: @dse_strncpy_test6( |
| ; CHECK-NEXT: tail call void @llvm.memset.p0i8.i64(i8* [[OUT1:%.*]], i8 42, i64 100, i1 false) |
| ; CHECK-NEXT: [[CALL:%.*]] = tail call i8* @strncpy(i8* [[OUT2:%.*]], i8* [[IN:%.*]], i64 100) |
| ; CHECK-NEXT: ret void |
| ; |
| tail call void @llvm.memset.p0i8.i64(i8* %out1, i8 42, i64 100, i1 false) |
| %call = tail call i8* @strncpy(i8* %out2, i8* %in, i64 100) |
| ret void |
| } |
