[PATCH] D68377: [Builtins] Teach Clang about memccpy
Dávid Bolvanský via Phabricator via cfe-commits
cfe-commits at lists.llvm.org
Sun Oct 6 12:37:36 PDT 2019
xbolva00 updated this revision to Diff 223441.
xbolva00 added a comment.
Added it for msvc too.
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D68377/new/
https://reviews.llvm.org/D68377
Files:
include/clang/Basic/Builtins.def
test/CodeGen/builtin-memfns.c
test/CodeGen/memccpy-libcall.c
Index: test/CodeGen/memccpy-libcall.c
===================================================================
--- test/CodeGen/memccpy-libcall.c
+++ test/CodeGen/memccpy-libcall.c
@@ -0,0 +1,12 @@
+// RUN: %clang_cc1 -fno-builtin-memccpy -emit-llvm < %s| FileCheck %s
+
+typedef __SIZE_TYPE__ size_t;
+
+void *memccpy(void *, void const *, int, size_t);
+
+void test13(char *d, char *s, int c, size_t n) {
+ // CHECK: call i8* @memccpy{{.*}} #2
+ memccpy(d, s, c, n);
+}
+
+// CHECK: attributes #2 = { nobuiltin }
Index: test/CodeGen/builtin-memfns.c
===================================================================
--- test/CodeGen/builtin-memfns.c
+++ test/CodeGen/builtin-memfns.c
@@ -4,6 +4,7 @@
typedef __SIZE_TYPE__ size_t;
void *memcpy(void *, void const *, size_t);
+void *memccpy(void *, void const *, int, size_t);
// CHECK: @test1
// CHECK: call void @llvm.memset.p0i8.i32
@@ -118,3 +119,9 @@
// CHECK: call void @llvm.memcpy{{.*}}(
memcpy(&dest_array, &dest_array, 2);
}
+
+// CHECK-LABEL: @test13
+void test13(char *d, char *s, int c, size_t n) {
+ // CHECK: call i8* @memccpy
+ memccpy(d, s, c, n);
+}
Index: include/clang/Basic/Builtins.def
===================================================================
--- include/clang/Basic/Builtins.def
+++ include/clang/Basic/Builtins.def
@@ -876,7 +876,8 @@
LANGBUILTIN(__fastfail, "vUi", "nr", ALL_MS_LANGUAGES)
// Microsoft library builtins.
-LIBBUILTIN(_setjmpex, "iJ", "fj", "setjmpex.h", ALL_MS_LANGUAGES)
+LIBBUILTIN(_setjmpex, "iJ", "fj", "setjmpex.h", ALL_MS_LANGUAGES)
+LIBBUILTIN(memccpy, "v*v*vC*iz", "f", "string.h", ALL_MS_LANGUAGES)
// C99 library functions
// C99 stdarg.h
@@ -979,6 +980,7 @@
// when these functions are used in non-GNU mode. PR16138.
LIBBUILTIN(alloca, "v*z", "f", "stdlib.h", ALL_GNU_LANGUAGES)
// POSIX string.h
+LIBBUILTIN(memccpy, "v*v*vC*iz", "f", "string.h", ALL_GNU_LANGUAGES)
LIBBUILTIN(stpcpy, "c*c*cC*", "f", "string.h", ALL_GNU_LANGUAGES)
LIBBUILTIN(stpncpy, "c*c*cC*z", "f", "string.h", ALL_GNU_LANGUAGES)
LIBBUILTIN(strdup, "c*cC*", "f", "string.h", ALL_GNU_LANGUAGES)
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