diff options
| -rw-r--r-- | lib/Target/README.txt | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/lib/Target/README.txt b/lib/Target/README.txt index 2d513c8cc3..c788360df6 100644 --- a/lib/Target/README.txt +++ b/lib/Target/README.txt @@ -1734,5 +1734,20 @@ if.end: And functionattrs doesn't realize that the p.0 load points to function local memory. +Also, functionattrs doesn't know about memcpy/memset. This function should be +marked readnone, since it only twiddles local memory, but functionattrs doesn't +handle memset/memcpy/memmove aggressively: + +struct X { int *p; int *q; }; +int foo() { + int i = 0, j = 1; + struct X x, y; + int **p; + y.p = &i; + x.q = &j; + p = __builtin_memcpy (&x, &y, sizeof (int *)); + return **p; +} + //===---------------------------------------------------------------------===// |