Ahmed Bougacha 0f32a037ef [MemCpyOpt] Use the raw i8* dest when optimizing memset+memcpy. ... MemIntrinsic::getDest() looks through pointer casts, and using it directly when building the new GEP+memset results in stuff like: %0 = getelementptr i64* %p, i32 16 %1 = bitcast i64* %0 to i8* call ..memset(i8* %1, ...) instead of the correct: %0 = bitcast i64* %p to i8* %1 = getelementptr i8* %0, i32 16 call ..memset(i8* %1, ...) Instead, use getRawDest, which just gives you the i8* value. While there, use the memcpy's dest, as it's live anyway. In most cases, when the optimization triggers, the memset and memcpy sizes are the same, so the built memset is 0-sized and eliminated. The problem occurs when they're different. Fixes a regression caused by r235232: PR23300. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@235419 91177308-0d34-0410-b5e6-96231b3b80d8		2015-04-21 21:28:33 +00:00
..
2008-02-24-MultipleUseofSRet.ll	[opaque pointer type] Add textual IR support for explicit type parameter to getelementptr instruction	2015-02-27 19:29:02 +00:00
2008-03-13-ReturnSlotBitcast.ll	[opaque pointer type] Add textual IR support for explicit type parameter to load instruction	2015-02-27 21:17:42 +00:00
2011-06-02-CallSlotOverwritten.ll	[opaque pointer type] Add textual IR support for explicit type parameter to load instruction	2015-02-27 21:17:42 +00:00
align.ll	[opaque pointer type] Add textual IR support for explicit type parameter to getelementptr instruction	2015-02-27 19:29:02 +00:00
atomic.ll	[opaque pointer type] Add textual IR support for explicit type parameter to load instruction	2015-02-27 21:17:42 +00:00
callslot_aa.ll	Properly update AA metadata when performing call slot optimization	2015-02-07 17:54:36 +00:00
callslot_deref.ll	[opaque pointer type] Add textual IR support for explicit type parameter to getelementptr instruction	2015-02-27 19:29:02 +00:00
capturing-func.ll	Don't eliminate memcpy's when the address of the pointer may itself be relevant. Fixes PR18304. Patch by David Wiberg!	2014-07-14 18:52:02 +00:00
crash.ll	[opaque pointer type] Add textual IR support for explicit type parameter to getelementptr instruction	2015-02-27 19:29:02 +00:00
form-memset.ll	[opaque pointer type] Add textual IR support for explicit type parameter to the call instruction	2015-04-16 23:24:18 +00:00
loadstore-sret.ll	[opaque pointer type] Add textual IR support for explicit type parameter to load instruction	2015-02-27 21:17:42 +00:00
memcpy-to-memset-with-lifetimes.ll	Fix a really bad miscompile introduced in r216865 - the else-if logic	2014-09-01 10:09:18 +00:00
memcpy-to-memset.ll	[opaque pointer type] Add textual IR support for explicit type parameter to getelementptr instruction	2015-02-27 19:29:02 +00:00
memcpy-undef.ll	[opaque pointer type] Add textual IR support for explicit type parameter to getelementptr instruction	2015-02-27 19:29:02 +00:00
memcpy.ll	[opaque pointer type] Add textual IR support for explicit type parameter to gep operator	2015-03-13 18:20:45 +00:00
memmove.ll	[opaque pointer type] Add textual IR support for explicit type parameter to gep operator	2015-03-13 18:20:45 +00:00
memset-memcpy-redundant-memset.ll	[MemCpyOpt] Use the raw i8* dest when optimizing memset+memcpy.	2015-04-21 21:28:33 +00:00
smaller.ll	[opaque pointer type] Add textual IR support for explicit type parameter to gep operator	2015-03-13 18:20:45 +00:00
sret.ll	[opaque pointer type] Add textual IR support for explicit type parameter to load instruction	2015-02-27 21:17:42 +00:00