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3946de0456
MSVC pragma function tells the compiler to generate calls to functions in the pragma function list, instead of using the builtin. Needs https://reviews.llvm.org/D124701 https://docs.microsoft.com/en-us/cpp/preprocessor/function-c-cpp?view=msvc-170 Reviewed By: aaron.ballman Differential Revision: https://reviews.llvm.org/D124702
39 lines
1.2 KiB
C
39 lines
1.2 KiB
C
// RUN: %clang_cc1 -emit-llvm -fms-extensions -o - %s | FileCheck %s
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typedef typeof(sizeof(0)) size_t;
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void bar(char *s);
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void *memset(void *s, int c, size_t n);
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void *memcpy(void *d, const void *s, size_t n);
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// CHECK: define{{.*}} void @foo1({{.*}}) #[[NO_NOBUILTIN:[0-9]+]]
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void foo1(char *s, char *d, size_t n) {
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bar(s);
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memset(s, 0, n);
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memcpy(d, s, n);
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}
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#pragma function(strlen, memset)
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// CHECK: define{{.*}} void @foo2({{.*}}) #[[NOBUILTIN_MEMSET:[0-9]+]]
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void foo2(char *s, char *d, size_t n) {
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bar(s);
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memset(s, 1, n);
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memcpy(d, s, n);
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}
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#pragma function(memcpy)
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// CHECK: define{{.*}} void @foo3({{.*}}) #[[NOBUILTIN_MEMSET_MEMCPY:[0-9]+]]
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void foo3(char *s, char *d, size_t n) {
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bar(s);
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memset(s, 2, n);
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memcpy(d, s, n);
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}
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// CHECK-NOT: attributes #[[NO_NOBUILTIN]] = {{{.*}}"no-builtin-memset"{{.*}}}
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// CHECK-NOT: attributes #[[NO_NOBUILTIN]] = {{{.*}}"no-builtin-memcpy"{{.*}}"no-builtin-memset"{{.*}}}
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// CHECK: attributes #[[NOBUILTIN_MEMSET]] = {{{.*}}"no-builtin-memset"{{.*}}}
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// CHECK-NOT: attributes #[[NOBUILTIN_MEMSET]] = {{{.*}}"no-builtin-memcpy"{{.*}}"no-builtin-memset"{{.*}}}
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// CHECK: attributes #[[NOBUILTIN_MEMSET_MEMCPY]] = {{{.*}}"no-builtin-memcpy"{{.*}}"no-builtin-memset"{{.*}}}
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