4 Commits

Author	SHA1	Message	Date
Chris Lattner	c5af649758	fix PR5287, a serious regression from my previous patches. Thanks to ... Duncan for the nice tiny testcase. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84992 91177308-0d34-0410-b5e6-96231b3b80d8	2009-10-24 05:22:15 +00:00
Chris Lattner	17f0cd3cc1	teach libanalysis to simplify vector loads with bitcast sources. This ... implements something out of Target/README.txt producing: _foo: ## @foo movl 4(%esp), %eax movapd LCPI1_0, %xmm0 movapd %xmm0, (%eax) ret $4 instead of: _foo: ## @foo movl 4(%esp), %eax movapd _b, %xmm0 mulpd LCPI1_0, %xmm0 addpd _a, %xmm0 movapd %xmm0, (%eax) ret $4 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84942 91177308-0d34-0410-b5e6-96231b3b80d8	2009-10-23 06:57:37 +00:00
Chris Lattner	739208a790	enhance FoldReinterpretLoadFromConstPtr to handle loads of up to 32 ... bytes (i256). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84941 91177308-0d34-0410-b5e6-96231b3b80d8	2009-10-23 06:50:36 +00:00
Chris Lattner	fe8c7c807c	teach libanalysis to fold int and fp loads from almost arbitrary ... non-type-safe constant initializers. This sort of thing happens quite a bit for 4-byte loads out of string constants, unions, bitfields, and an interesting endianness check from sqlite, which is something like this: const int sqlite3one = 1; # define SQLITE_BIGENDIAN (*(char *)(&sqlite3one)==0) # define SQLITE_LITTLEENDIAN (*(char *)(&sqlite3one)==1) # define SQLITE_UTF16NATIVE (SQLITE_BIGENDIAN?SQLITE_UTF16BE:SQLITE_UTF16LE) all of these macros now constant fold away. This implements PR3152 and is based on a patch started by Eli, but heavily modified and extended. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84936 91177308-0d34-0410-b5e6-96231b3b80d8	2009-10-23 06:23:49 +00:00