llvm-6502

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Commit Graph

Author	SHA1	Message	Date
Evan Cheng	fb11288109	Model inline asm constraint which ties an input to an output register as machine operand TIED_TO constraint. This eliminated the need to pre-allocate registers for these. This also allows register allocator can eliminate the unneeded copies. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67512 91177308-0d34-0410-b5e6-96231b3b80d8	2009-03-23 08:01:15 +00:00
Chris Lattner	0fe71e9bb1	Treat clobber operands like early clobbers: if we have any, we force sdisel to do all regalloc for an asm. This leads to gross but correct codegen. This fixes the rest of PR2078. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47454 91177308-0d34-0410-b5e6-96231b3b80d8	2008-02-21 19:43:13 +00:00
Chris Lattner	7cbeb2431c	Fix a (harmless) but where vregs were added to the used reg lists for inline asms. Fix PR2078 by marking aliases of registers used when a register is marked used. This prevents EAX from being allocated when AX is listed in the clobber set for the asm. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47426 91177308-0d34-0410-b5e6-96231b3b80d8	2008-02-21 04:55:52 +00:00

Author

SHA1

Message

Date

Evan Cheng

fb11288109

Model inline asm constraint which ties an input to an output register as machine operand TIED_TO constraint. This eliminated the need to pre-allocate registers for these. This also allows register allocator can eliminate the unneeded copies.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67512 91177308-0d34-0410-b5e6-96231b3b80d8

2009-03-23 08:01:15 +00:00

Chris Lattner

0fe71e9bb1

Treat clobber operands like early clobbers: if we have

any, we force sdisel to do all regalloc for an asm.  This
leads to gross but correct codegen.

This fixes the rest of PR2078.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47454 91177308-0d34-0410-b5e6-96231b3b80d8

2008-02-21 19:43:13 +00:00

Chris Lattner

7cbeb2431c

Fix a (harmless) but where vregs were added to the used reg lists for

inline asms.

Fix PR2078 by marking aliases of registers used when a register is 
marked used.  This prevents EAX from being allocated when AX is listed
in the clobber set for the asm.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47426 91177308-0d34-0410-b5e6-96231b3b80d8

2008-02-21 04:55:52 +00:00

3 Commits