Nate Begeman 5a8441ea3f Teach the legalizer how to promote SINT_TO_FP to a wider SINT_TO_FP that ... the target natively supports. This eliminates some special-case code from the x86 backend and generates better code as well. For an i8 to f64 conversion, before & after: _x87 before: subl $2, %esp movb 6(%esp), %al movsbw %al, %ax movw %ax, (%esp) filds (%esp) addl $2, %esp ret _x87 after: subl $2, %esp movsbw 6(%esp), %ax movw %ax, (%esp) filds (%esp) addl $2, %esp ret _sse before: subl $12, %esp movb 16(%esp), %al movsbl %al, %eax cvtsi2sd %eax, %xmm0 addl $12, %esp ret _sse after: subl $12, %esp movsbl 16(%esp), %eax cvtsi2sd %eax, %xmm0 addl $12, %esp ret git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22452 91177308-0d34-0410-b5e6-96231b3b80d8		2005-07-16 02:02:34 +00:00
..
LegalizeDAG.cpp	Teach the legalizer how to promote SINT_TO_FP to a wider SINT_TO_FP that	2005-07-16 02:02:34 +00:00
Makefile
SelectionDAG.cpp	Change *EXTLOAD to use an VTSDNode operand instead of being an MVTSDNode.	2005-07-10 01:55:33 +00:00
SelectionDAGISel.cpp	Make several cleanups to Andrews varargs change:	2005-07-05 19:57:53 +00:00
SelectionDAGPrinter.cpp	You can't use config options without config.h	2005-07-15 22:48:31 +00:00
TargetLowering.cpp	Remove trailing whitespace	2005-04-21 22:55:34 +00:00