Evan Cheng da55c4ffb7 Fix PR3149. If an early clobber def is a physical register and it is tied to an input operand, it effectively extends the live range of the physical register. Currently we do not have a good way to represent this. ... 172 %ECX<def> = MOV32rr %reg1039<kill> 180 INLINEASM <es:subl $5,$1 sbbl $3,$0>, 10, %EAX<def>, 14, %ECX<earlyclobber,def>, 9, %EAX<kill>, 36, <fi#0>, 1, %reg0, 0, 9, %ECX<kill>, 36, <fi#1>, 1, %reg0, 0 188 %EAX<def> = MOV32rr %EAX<kill> 196 %ECX<def> = MOV32rr %ECX<kill> 204 %ECX<def> = MOV32rr %ECX<kill> 212 %EAX<def> = MOV32rr %EAX<kill> 220 %EAX<def> = MOV32rr %EAX 228 %reg1039<def> = MOV32rr %ECX<kill> The early clobber operand ties ECX input to the ECX def. The live interval of ECX is represented as this: %reg20,inf = [46,47:1)[174,230:0) 0@174-(230) 1@46-(47) The right way to represent this is something like %reg20,inf = [46,47:2)[174,182:1)[181:230:0) 0@174-(182) 1@181-230 @2@46-(47) Of course that won't work since that means overlapping live ranges defined by two val#. The workaround for now is to add a bit to val# which says the val# is redefined by a early clobber def somewhere. This prevents the move at 228 from being optimized away by SimpleRegisterCoalescing::AdjustCopiesBackFrom. llvm-svn: 61259		2008-12-19 20:58:01 +00:00
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Alpha	Correct some thinkos in the expansion of ADD/SUB	2008-11-12 08:23:26 +00:00
ARM	Clean up some ARM GV asm printing out; minor fixes to match what gcc does.	2008-12-06 02:00:55 +00:00
CBackend	Fix PR2907 by digging through constant expressions to find FP constants that	2008-10-22 04:53:16 +00:00
CellSPU	CellSPU:	2008-12-09 06:12:03 +00:00
CPP	Put CPPBackend tests into their own directory and run them only if they're	2008-07-10 22:35:32 +00:00
Generic	For amusement, implement SADDO, SSUBO, UADDO, USUBO	2008-12-10 12:30:42 +00:00
IA64	sabre brings to my attention that the 'tr' suffix is also obsolete	2008-05-20 21:00:03 +00:00
Mips	Fix PR2667: add soft float support for sint_to_fp/uint_to_fp	2008-11-10 17:36:26 +00:00
PowerPC	Fix PR3149. If an early clobber def is a physical register and it is tied to an input operand, it effectively extends the live range of the physical register. Currently we do not have a good way to represent this.	2008-12-19 20:58:01 +00:00
SPARC	Add testcase for 'r' inline asm operand	2008-10-10 20:28:59 +00:00
X86	Fix PR3149. If an early clobber def is a physical register and it is tied to an input operand, it effectively extends the live range of the physical register. Currently we do not have a good way to represent this.	2008-12-19 20:58:01 +00:00
XCore	Add support for ISD::TRAP to the XCore backend	2008-12-03 10:59:16 +00:00