Chris Lattner 3bd39d4ca8 Implement some dag combines that allow doing fneg/fabs/fcopysign in integer ... registers if used by a bitconvert or using a bitconvert. This allows us to avoid constant pool loads and use cheaper integer instructions when the values come from or end up in integer regs anyway. For example, we now compile CodeGen/X86/fp-in-intregs.ll to: _test1: movl $2147483648, %eax xorl 4(%esp), %eax ret _test2: movl $1065353216, %eax orl 4(%esp), %eax andl $3212836864, %eax ret Instead of: _test1: movss 4(%esp), %xmm0 xorps LCPI2_0, %xmm0 movd %xmm0, %eax ret _test2: movss 4(%esp), %xmm0 andps LCPI3_0, %xmm0 movss LCPI3_1, %xmm1 andps LCPI3_2, %xmm1 orps %xmm0, %xmm1 movd %xmm1, %eax ret bitconverts can happen due to various calling conventions that require fp values to passed in integer regs in some cases, e.g. when returning a complex. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46414 91177308-0d34-0410-b5e6-96231b3b80d8		2008-01-27 17:42:27 +00:00
..
Analysis	Teach basicaa that 'byval' arguments define a new memory location that	2008-01-24 18:00:32 +00:00
Archive
Assembler	Two occurrences on one line count as one...	2008-01-11 21:46:24 +00:00
Bindings/Ocaml	Another backwards compatibility fix.	2007-12-30 22:48:58 +00:00
Bitcode	Bring back int_x86_sse2_movl_dq intrinsic for backward compatibility. Make sure	2007-12-17 22:33:23 +00:00
BugPoint
C++Frontend	Test for PR1942.	2008-01-25 17:36:44 +00:00
CFrontend	Move testcase to the code gen directory.	2008-01-26 06:53:06 +00:00
CodeGen	Implement some dag combines that allow doing fneg/fabs/fcopysign in integer	2008-01-27 17:42:27 +00:00
DebugInfo
ExecutionEngine	Teach the interpreter to read and write memory in the	2007-12-14 19:38:31 +00:00
Feature	Use not instead of ignore when an exit status is expected to always	2007-12-11 15:50:23 +00:00
FrontendAda	Testcase for gimplify_expr crash caused by an	2008-01-15 19:55:41 +00:00
FrontendObjC	Rename these tests to use the appropriate suffixes.	2007-12-11 15:55:52 +00:00
Integer	Fix PR1146: parameter attributes are longer part of	2007-11-27 13:23:08 +00:00
lib	Fix bug in regression tests that ignored stderr output in RUN lines. Updated tests and fixed broken run lines.	2007-11-28 04:57:00 +00:00
Linker	Use not instead of ignore when an exit status is expected to always	2007-12-11 15:50:23 +00:00
Other
Scripts
TableGen
Transforms	The CorrelatedExpressions pass is now no more.	2008-01-27 06:13:32 +00:00
Verifier	update this test to pass with duncan's change.	2008-01-22 05:31:58 +00:00
Makefile	remove attributions from the rest of the llvm makefiles.	2007-12-29 20:11:13 +00:00
Makefile.tests
TestRunner.sh