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| author | Gabor Greif <ggreif@gmail.com> | 2008-04-16 11:43:47 +0000 |
|---|---|---|
| committer | Gabor Greif <ggreif@gmail.com> | 2008-04-16 11:43:47 +0000 |
| commit | 917365bef1cfb8493558b76f8e6ceb1e76eba2c5 (patch) | |
| tree | a143812404865360c2bc8322b16e72c0cc529b60 /include/llvm/Support/Casting.h | |
| parent | 0d4bdde3270a8ed182a685a580031d6d5d743164 (diff) | |
| download | llvm-917365bef1cfb8493558b76f8e6ceb1e76eba2c5.tar.gz llvm-917365bef1cfb8493558b76f8e6ceb1e76eba2c5.tar.bz2 llvm-917365bef1cfb8493558b76f8e6ceb1e76eba2c5.tar.xz | |
merge of r49785 (from branches/ggreif/use-diet): pass V to dyn_cast by const reference, this avoids copy-constructing and destructing all the time. especially important if these constructors are not accessible
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49787 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'include/llvm/Support/Casting.h')
| -rw-r--r-- | include/llvm/Support/Casting.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/include/llvm/Support/Casting.h b/include/llvm/Support/Casting.h index 3a68817ce9..61b91343cb 100644 --- a/include/llvm/Support/Casting.h +++ b/include/llvm/Support/Casting.h @@ -221,7 +221,7 @@ inline typename cast_retty<X, Y*>::ret_type cast_or_null(Y *Val) { // template <class X, class Y> -inline typename cast_retty<X, Y>::ret_type dyn_cast(Y Val) { +inline typename cast_retty<X, Y>::ret_type dyn_cast(const Y &Val) { return isa<X>(Val) ? cast<X, Y>(Val) : 0; } @@ -229,7 +229,7 @@ inline typename cast_retty<X, Y>::ret_type dyn_cast(Y Val) { // value is accepted. // template <class X, class Y> -inline typename cast_retty<X, Y>::ret_type dyn_cast_or_null(Y Val) { +inline typename cast_retty<X, Y>::ret_type dyn_cast_or_null(const Y &Val) { return (Val && isa<X>(Val)) ? cast<X, Y>(Val) : 0; } |