Nate Begeman f63be7d395 First round of support for doing scalar FP using the SSE2 ISA extension and ... XMM registers. There are many known deficiencies and fixmes, which will be addressed ASAP. The major benefit of this work is that it will allow the LLVM register allocator to allocate FP registers across basic blocks. The x86 backend will still default to x87 style FP. To enable this work, you must pass -enable-sse-scalar-fp and either -sse2 or -sse3 to llc. An example before and after would be for: double foo(double *P) { double Sum = 0; int i; for (i = 0; i < 1000; ++i) Sum += P[i]; return Sum; } The inner loop looks like the following: x87: .LBB_foo_1: # no_exit fldl (%esp) faddl (%eax,%ecx,8) fstpl (%esp) incl %ecx cmpl $1000, %ecx #FP_REG_KILL jne .LBB_foo_1 # no_exit SSE2: addsd (%eax,%ecx,8), %xmm0 incl %ecx cmpl $1000, %ecx #FP_REG_KILL jne .LBB_foo_1 # no_exit git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22340 91177308-0d34-0410-b5e6-96231b3b80d8		2005-07-06 18:59:04 +00:00
..
Analysis	the correct fix was to fix AliasAnalysis.getModRefInfo	2005-06-20 15:25:22 +00:00
Archive
AsmParser	Fix grammar	2005-06-24 18:00:40 +00:00
Bytecode	If we support structs as va_list, we must pass pointers to them to va_copy	2005-06-22 21:04:42 +00:00
CodeGen	Make several cleanups to Andrews varargs change:	2005-07-05 19:57:53 +00:00
Debugger
ExecutionEngine	core changes for varargs	2005-06-18 18:34:52 +00:00
Linker
Support	HP-UX system headers make a mess of isinf(), so much so that gcc fixincludes	2005-05-16 06:45:57 +00:00
System	Put in a hack for Cygwin that prevents mkdtemp from being used since	2005-06-02 05:38:20 +00:00
Target	First round of support for doing scalar FP using the SSE2 ISA extension and	2005-07-06 18:59:04 +00:00
Transforms	Fix PR590 and Transforms/Mem2Reg/2005-06-30-ReadBeforeWrite.ll.	2005-06-30 07:29:44 +00:00
VMCore	core changes for varargs	2005-06-18 18:34:52 +00:00
Makefile