From: Eric Christopher <echristo@gmail.com>
Date: Thu, 24 May 2018 06:09:28 +0000 (+0000)
Subject: Add Builtins.def support for fread and fwrite to ensure that -fno-builtin-
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=0504bf2ebb0949b0d304829406dcbe7793d0d42f;p=clang

Add Builtins.def support for fread and fwrite to ensure that -fno-builtin-
works with them and test accordingly.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@333156 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/include/clang/Basic/Builtins.def b/include/clang/Basic/Builtins.def
index da23f92894..2126acb941 100644
--- a/include/clang/Basic/Builtins.def
+++ b/include/clang/Basic/Builtins.def
@@ -847,6 +847,7 @@ LIBBUILTIN(memset, "v*v*iz",      "f",     "string.h", ALL_LANGUAGES)
 LIBBUILTIN(strerror, "c*i",       "f",     "string.h", ALL_LANGUAGES)
 LIBBUILTIN(strlen, "zcC*",        "f",     "string.h", ALL_LANGUAGES)
 // C99 stdio.h
+// FIXME: This list is incomplete.
 LIBBUILTIN(printf, "icC*.",       "fp:0:", "stdio.h", ALL_LANGUAGES)
 LIBBUILTIN(fprintf, "iP*cC*.",    "fp:1:", "stdio.h", ALL_LANGUAGES)
 LIBBUILTIN(snprintf, "ic*zcC*.",  "fp:2:", "stdio.h", ALL_LANGUAGES)
@@ -861,6 +862,9 @@ LIBBUILTIN(sscanf, "icC*RcC*R.",  "fs:1:", "stdio.h", ALL_LANGUAGES)
 LIBBUILTIN(vscanf, "icC*Ra",      "fS:0:", "stdio.h", ALL_LANGUAGES)
 LIBBUILTIN(vfscanf, "iP*RcC*Ra",  "fS:1:", "stdio.h", ALL_LANGUAGES)
 LIBBUILTIN(vsscanf, "icC*RcC*Ra", "fS:1:", "stdio.h", ALL_LANGUAGES)
+LIBBUILTIN(fread, "zv*zzP*",      "f",     "stdio.h", ALL_LANGUAGES)
+LIBBUILTIN(fwrite, "zvC*zzP*",    "f",     "stdio.h", ALL_LANGUAGES)
+
 // C99 ctype.h
 LIBBUILTIN(isalnum, "ii", "fnU", "ctype.h", ALL_LANGUAGES)
 LIBBUILTIN(isalpha, "ii", "fnU", "ctype.h", ALL_LANGUAGES)
diff --git a/test/CodeGen/libcalls-fno-builtin.c b/test/CodeGen/libcalls-fno-builtin.c
index 8515e1d123..14f361747c 100644
--- a/test/CodeGen/libcalls-fno-builtin.c
+++ b/test/CodeGen/libcalls-fno-builtin.c
@@ -5,12 +5,14 @@
 // RUN:  -fno-builtin-strcpy -fno-builtin-stpcpy -fno-builtin-strncpy -fno-builtin-strlen \
 // RUN:  -fno-builtin-strpbrk -fno-builtin-strspn -fno-builtin-strtod -fno-builtin-strtof \
 // RUN:  -fno-builtin-strtold -fno-builtin-strtol -fno-builtin-strtoll -fno-builtin-strtoul \
-// RUN:  -fno-builtin-strtoull -o - %s | FileCheck %s
+// RUN:  -fno-builtin-strtoull -fno-builtin-fread -fno-builtin-fwrite -o - %s | FileCheck %s
 // RUN: %clang_cc1 -S -O3 -fno-builtin -o - %s | FileCheck --check-prefix=ASM %s
 // RUN: %clang_cc1 -S -O3 -fno-builtin-ceil -o - %s | FileCheck --check-prefix=ASM-INDIV %s
+
 // rdar://10551066
 
 typedef __SIZE_TYPE__ size_t;
+typedef struct FILE FILE;
 
 double ceil(double x);
 double copysign(double,double);
@@ -36,6 +38,9 @@ long int strtol(const char *nptr, char **endptr, int base);
 long long int strtoll(const char *nptr, char **endptr, int base);
 unsigned long int strtoul(const char *nptr, char **endptr, int base);
 unsigned long long int strtoull(const char *nptr, char **endptr, int base);
+size_t fread(void *ptr, size_t size, size_t nmemb, FILE *stream);
+size_t fwrite(const void *ptr, size_t size, size_t nmemb,
+              FILE *stream);
 
 double t1(double x) { return ceil(x); }
 // CHECK-LABEL: t1
@@ -139,4 +144,12 @@ long int t24(char **x) { return strtoull("1234", x, 10); }
 // CHECK-LABEL: t24
 // CHECK: call{{.*}}@strtoull{{.*}} [[ATTR]]
 
+void t25(FILE *fp, int *buf) {
+  size_t x = fwrite(buf, sizeof(int), 10, fp);
+  size_t y = fread(buf, sizeof(int), 10, fp);
+}
+// CHECK-LABEL: t25
+// CHECK: call{{.*}}@fwrite{{.*}} [[ATTR]]
+// CHECK: call{{.*}}@fread{{.*}} [[ATTR]]
+
 // CHECK: [[ATTR]] = { nobuiltin }