llvm/test/Transforms/InstCombine/unlocked-stdio.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -instcombine -S -mtriple=x86_64-unknown-linux-gnu | FileCheck %s

%struct._IO_FILE = type { i32, i8*, i8*, i8*, i8*, i8*, i8*, i8*, i8*, i8*, i8*, i8*, %struct._IO_marker*, %struct._IO_FILE*, i32, i32, i64, i16, i8, [1 x i8], i8*, i64, i8*, i8*, i8*, i8*, i64, i32, [20 x i8] }
%struct._IO_marker = type { %struct._IO_marker*, %struct._IO_FILE*, i32 }

@.str = private unnamed_addr constant [5 x i8] c"file\00", align 1
@.str.1 = private unnamed_addr constant [2 x i8] c"w\00", align 1
@.str.2 = private unnamed_addr constant [4 x i8] c"str\00", align 1
@stdout = external global %struct._IO_FILE*, align 8
@global_file = common global %struct._IO_FILE* null, align 8

define void @external_fgetc_test(%struct._IO_FILE* %f) {
; CHECK-LABEL: @external_fgetc_test(
; CHECK-NEXT:    [[CALL:%.*]] = call i32 @fgetc(%struct._IO_FILE* [[F:%.*]])
; CHECK-NEXT:    ret void
;
  %call = call i32 @fgetc(%struct._IO_FILE* %f)
  ret void
}

declare i32 @fgetc(%struct._IO_FILE* nocapture) #0

define void @external_fgetc_test2() {
; CHECK-LABEL: @external_fgetc_test2(
; CHECK-NEXT:    [[CALL:%.*]] = call %struct._IO_FILE* @fopen(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
; CHECK-NEXT:    [[FPUTC_UNLOCKED:%.*]] = call i32 @fputc_unlocked(i32 99, %struct._IO_FILE* [[CALL]])
; CHECK-NEXT:    ret void
;
  %call = call %struct._IO_FILE* @fopen(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
  %call1 = call i32 @fputc(i32 99, %struct._IO_FILE* %call)
  ret void
}

declare %struct._IO_FILE* @fopen(i8*, i8*)
declare i32 @fputc(i32, %struct._IO_FILE* nocapture) #0

define internal void @fgetc_test() {
; CHECK-LABEL: @fgetc_test(
; CHECK-NEXT:    [[CALL:%.*]] = call %struct._IO_FILE* @fopen(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
; CHECK-NEXT:    [[FGETC_UNLOCKED:%.*]] = call i32 @fgetc_unlocked(%struct._IO_FILE* [[CALL]])
; CHECK-NEXT:    ret void
;
  %call = call %struct._IO_FILE* @fopen(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
  %call1 = call i32 @fgetc(%struct._IO_FILE* %call)
  ret void
}

define void @external_fgetc_internal_test() {
; CHECK-LABEL: @external_fgetc_internal_test(
; CHECK-NEXT:    call void @fgetc_test()
; CHECK-NEXT:    ret void
;
  call void @fgetc_test()
  ret void
}

define internal void @fwrite_test() {
; CHECK-LABEL: @fwrite_test(
; CHECK-NEXT:    [[S:%.*]] = alloca [10 x i8], align 1
; CHECK-NEXT:    [[CALL:%.*]] = call %struct._IO_FILE* @fopen(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
; CHECK-NEXT:    [[ARRAYDECAY:%.*]] = getelementptr inbounds [10 x i8], [10 x i8]* [[S]], i64 0, i64 0
; CHECK-NEXT:    [[TMP1:%.*]] = call i64 @fwrite_unlocked(i8* nonnull [[ARRAYDECAY]], i64 10, i64 10, %struct._IO_FILE* [[CALL]])
; CHECK-NEXT:    ret void
;
  %s = alloca [10 x i8], align 1
  %call = call %struct._IO_FILE* @fopen(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
  %arraydecay = getelementptr inbounds [10 x i8], [10 x i8]* %s, i64 0, i64 0
  %call1 = call i64 @fwrite(i8* nonnull %arraydecay, i64 10, i64 10, %struct._IO_FILE* %call)
  ret void
}

define internal void @fread_test() {
; CHECK-LABEL: @fread_test(
; CHECK-NEXT:    [[S:%.*]] = alloca [10 x i8], align 1
; CHECK-NEXT:    [[CALL:%.*]] = call %struct._IO_FILE* @fopen(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
; CHECK-NEXT:    [[ARRAYDECAY:%.*]] = getelementptr inbounds [10 x i8], [10 x i8]* [[S]], i64 0, i64 0
; CHECK-NEXT:    [[TMP1:%.*]] = call i64 @fread_unlocked(i8* nonnull [[ARRAYDECAY]], i64 10, i64 10, %struct._IO_FILE* [[CALL]])
; CHECK-NEXT:    ret void
;
  %s = alloca [10 x i8], align 1
  %call = call %struct._IO_FILE* @fopen(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
  %arraydecay = getelementptr inbounds [10 x i8], [10 x i8]* %s, i64 0, i64 0
  %call1 = call i64 @fread(i8* nonnull %arraydecay, i64 10, i64 10, %struct._IO_FILE* %call)
  ret void
}

define internal void @fputs_test() {
; CHECK-LABEL: @fputs_test(
; CHECK-NEXT:    [[CALL:%.*]] = call %struct._IO_FILE* @fopen(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
; CHECK-NEXT:    [[TMP1:%.*]] = call i64 @fwrite_unlocked(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0), i64 3, i64 1, %struct._IO_FILE* [[CALL]])
; CHECK-NEXT:    ret void
;
  %call = call %struct._IO_FILE* @fopen(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
  %call1 = call i32 @fputs(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0), %struct._IO_FILE* %call)
  ret void
}

define internal void @fgets_test() {
; CHECK-LABEL: @fgets_test(
; CHECK-NEXT:    [[BUF:%.*]] = alloca [10 x i8], align 1
; CHECK-NEXT:    [[CALL:%.*]] = call %struct._IO_FILE* @fopen(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
; CHECK-NEXT:    [[ARRAYDECAY:%.*]] = getelementptr inbounds [10 x i8], [10 x i8]* [[BUF]], i64 0, i64 0
; CHECK-NEXT:    [[FGETS_UNLOCKED:%.*]] = call i8* @fgets_unlocked(i8* nonnull [[ARRAYDECAY]], i32 10, %struct._IO_FILE* [[CALL]])
; CHECK-NEXT:    ret void
;
  %buf = alloca [10 x i8], align 1
  %call = call %struct._IO_FILE* @fopen(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
  %arraydecay = getelementptr inbounds [10 x i8], [10 x i8]* %buf, i64 0, i64 0
  %call1 = call i8* @fgets(i8* nonnull %arraydecay, i32 10, %struct._IO_FILE* %call)
  ret void
}

define internal void @fputc_test() {
; CHECK-LABEL: @fputc_test(
; CHECK-NEXT:    [[CALL:%.*]] = call %struct._IO_FILE* @fopen(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
; CHECK-NEXT:    [[FPUTC_UNLOCKED:%.*]] = call i32 @fputc_unlocked(i32 99, %struct._IO_FILE* [[CALL]])
; CHECK-NEXT:    ret void
;
  %call = call %struct._IO_FILE* @fopen(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
  %call1 = call i32 @fputc(i32 99, %struct._IO_FILE* %call)
  ret void
}

define i32 @main() {
; CHECK-LABEL: @main(
; CHECK-NEXT:    call void @fwrite_test()
; CHECK-NEXT:    call void @fread_test()
; CHECK-NEXT:    call void @fputs_test()
; CHECK-NEXT:    call void @fgets_test()
; CHECK-NEXT:    call void @fputc_test()
; CHECK-NEXT:    call void @fgetc_test()
; CHECK-NEXT:    ret i32 0
;
  call void @fwrite_test()
  call void @fread_test()
  call void @fputs_test()
  call void @fgets_test()
  call void @fputc_test()
  call void @fgetc_test()
  ret i32 0
}

declare i32 @fclose(%struct._IO_FILE* nocapture)

define void @test_with_fclose() {
; CHECK-LABEL: @test_with_fclose(
; CHECK-NEXT:    [[CALL:%.*]] = call %struct._IO_FILE* @fopen(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
; CHECK-NEXT:    [[TMP1:%.*]] = call i64 @fwrite_unlocked(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0), i64 3, i64 1, %struct._IO_FILE* [[CALL]])
; CHECK-NEXT:    [[CALL2:%.*]] = call i32 @fclose(%struct._IO_FILE* [[CALL]])
; CHECK-NEXT:    ret void
;
  %call = call %struct._IO_FILE* @fopen(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0)) #2
  %call1 = call i64 @fwrite(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0), i64 3, i64 1, %struct._IO_FILE* %call)
  %call2 = call i32 @fclose(%struct._IO_FILE* %call) #2
  ret void
}

declare void @modify_file(%struct._IO_FILE*)

define void @test_captured_by_function(){
; CHECK-LABEL: @test_captured_by_function(
; CHECK-NEXT:    [[CALL:%.*]] = call %struct._IO_FILE* @fopen(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
; CHECK-NEXT:    call void @modify_file(%struct._IO_FILE* [[CALL]])
; CHECK-NEXT:    [[CALL1:%.*]] = call i64 @fwrite(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0), i64 3, i64 1, %struct._IO_FILE* [[CALL]])
; CHECK-NEXT:    [[CALL2:%.*]] = call i32 @fclose(%struct._IO_FILE* [[CALL]])
; CHECK-NEXT:    ret void
;
  %call = call %struct._IO_FILE* @fopen(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0)) #2
  call void @modify_file(%struct._IO_FILE* %call) #2
  %call1 = call i64 @fwrite(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0), i64 3, i64 1, %struct._IO_FILE* %call)
  %call2 = call i32 @fclose(%struct._IO_FILE* %call) #2
  ret void
}

define void @test_captured_by_global_value() {
; CHECK-LABEL: @test_captured_by_global_value(
; CHECK-NEXT:    [[CALL:%.*]] = call %struct._IO_FILE* @fopen(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
; CHECK-NEXT:    [[DOTCAST:%.*]] = ptrtoint %struct._IO_FILE* [[CALL]] to i64
; CHECK-NEXT:    store i64 [[DOTCAST]], i64* bitcast (%struct._IO_FILE** @global_file to i64*), align 8
; CHECK-NEXT:    [[CALL1:%.*]] = call i64 @fwrite(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0), i64 3, i64 1, %struct._IO_FILE* [[CALL]])
; CHECK-NEXT:    [[CALL2:%.*]] = call i32 @fclose(%struct._IO_FILE* [[CALL]])
; CHECK-NEXT:    ret void
;
  %call = call %struct._IO_FILE* @fopen(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0)) #2
  %.cast = ptrtoint %struct._IO_FILE* %call to i64
  store i64 %.cast, i64* bitcast (%struct._IO_FILE** @global_file to i64*), align 8
  %call1 = call i64 @fwrite(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0), i64 3, i64 1, %struct._IO_FILE* %call)
  %call2 = call i32 @fclose(%struct._IO_FILE* %call) #2
  ret void
}

define void @test_captured_by_standard_stream(i8* nocapture readonly %s) {
; CHECK-LABEL: @test_captured_by_standard_stream(
; CHECK-NEXT:    [[CALL:%.*]] = tail call %struct._IO_FILE* @fopen(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
; CHECK-NEXT:    [[TMP:%.*]] = load %struct._IO_FILE*, %struct._IO_FILE** @stdout, align 8
; CHECK-NEXT:    [[CALL1:%.*]] = tail call i32 @fputs(i8* [[S:%.*]], %struct._IO_FILE* [[TMP]])
; CHECK-NEXT:    [[CALL2:%.*]] = tail call i32 @fclose(%struct._IO_FILE* [[TMP]])
; CHECK-NEXT:    ret void
;
  %call = tail call %struct._IO_FILE* @fopen(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
  %tmp = load %struct._IO_FILE*, %struct._IO_FILE** @stdout, align 8
  %call1 = tail call i32 @fputs(i8* %s, %struct._IO_FILE* %tmp)
  %call2 = tail call i32 @fclose(%struct._IO_FILE* %tmp)
  ret void
}

define void @test_captured_by_arg(i8* nocapture readonly %s, %struct._IO_FILE* nocapture %file) {
; CHECK-LABEL: @test_captured_by_arg(
; CHECK-NEXT:    [[CALL:%.*]] = tail call %struct._IO_FILE* @fopen(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
; CHECK-NEXT:    [[CALL1:%.*]] = tail call i32 @fputs(i8* [[S:%.*]], %struct._IO_FILE* [[FILE:%.*]])
; CHECK-NEXT:    [[CALL2:%.*]] = tail call i32 @fclose(%struct._IO_FILE* [[FILE]])
; CHECK-NEXT:    ret void
;
  %call = tail call %struct._IO_FILE* @fopen(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
  %call1 = tail call i32 @fputs(i8* %s, %struct._IO_FILE* %file)
  %call2 = tail call i32 @fclose(%struct._IO_FILE* %file)
  ret void
}

declare i64 @fwrite(i8* nocapture, i64, i64, %struct._IO_FILE* nocapture)
declare i64 @fread(i8* nocapture, i64, i64, %struct._IO_FILE* nocapture)
declare i32 @fputs(i8* nocapture readonly, %struct._IO_FILE* nocapture)
declare i8* @fgets(i8*, i32, %struct._IO_FILE* nocapture)