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| author | serge-sans-paille <sguelton@redhat.com> | 2019-12-11 21:30:10 +0100 |
|---|---|---|
| committer | serge-sans-paille <sguelton@redhat.com> | 2020-01-09 17:31:00 +0100 |
| commit | cee4a1c957426e9477c8579ff960c8c2bd4af9e2 (patch) | |
| tree | 6ae81e86924a355e2ce2fe41118af4f2b71a035a /clang/test/CodeGen | |
| parent | d27a15fed79c8e8484825ce6c3ce1682daeb1547 (diff) | |
| download | bcm5719-llvm-cee4a1c957426e9477c8579ff960c8c2bd4af9e2.tar.gz bcm5719-llvm-cee4a1c957426e9477c8579ff960c8c2bd4af9e2.zip | |
Improve support of GNU mempcpy
- Lower to the memcpy intrinsic
- Raise warnings when size/bounds are known
Differential Revision: https://reviews.llvm.org/D71374
Diffstat (limited to 'clang/test/CodeGen')
| -rw-r--r-- | clang/test/CodeGen/mempcpy-libcall.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/clang/test/CodeGen/mempcpy-libcall.c b/clang/test/CodeGen/mempcpy-libcall.c new file mode 100644 index 00000000000..b88f494f164 --- /dev/null +++ b/clang/test/CodeGen/mempcpy-libcall.c @@ -0,0 +1,12 @@ +// RUN: %clang_cc1 -emit-llvm < %s| FileCheck %s + +typedef __SIZE_TYPE__ size_t; + +void *mempcpy(void *, void const *, size_t); + +char *test(char *d, char *s, size_t n) { + // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64(i8* {{.*}} %[[REG1:[^ ]+]], i8* {{.*}} %1, i64 %[[REG2:[^ ]+]], i1 false) + // CHECK-NEXT: %[[REGr:[^ ]+]] = getelementptr inbounds i8, i8* %[[REG1]], i64 %[[REG2]] + // CHECK-NEXT: ret i8* %[[REGr]] + return mempcpy(d, s, n); +} |
