Commit Graph

359 Commits

Author SHA1 Message Date
Evan Cheng bfd259a2b7 For ISD::RET, if # of operands >= 2, try selection the real data dep. operand
first before the chain.
e.g.
int X;

int foo(int x)
{
  x += X + 37;
  return x;
}

If chain operand is selected first, we would generate:
	movl X, %eax
	movl 4(%esp), %ecx
	leal 37(%ecx,%eax), %eax

rather than
	movl $37, %eax
	addl 4(%esp), %eax
	addl X, %eax

which does not require %ecx. (Due to ADD32rm not matching.)

llvm-svn: 24673
2005-12-12 20:32:18 +00:00
Evan Cheng 0d6cfee704 * Added X86 store patterns.
* Added X86 dec patterns.

llvm-svn: 24654
2005-12-10 00:48:20 +00:00
Evan Cheng c9fab31098 * Added intelligence to X86 LEA addressing mode matching routine so it returns
false if the match is not profitable. e.g. leal 1(%eax), %eax.
* Added patterns for X86 integer loads and LEA32.

llvm-svn: 24635
2005-12-08 02:01:35 +00:00
Evan Cheng 4b02426130 Proper support for shifts with register shift value.
llvm-svn: 24559
2005-12-01 00:43:55 +00:00
Chris Lattner af2e0373dd SelectNodeTo now returns its result, we must pay attention to it.
llvm-svn: 24550
2005-11-30 22:59:19 +00:00
Evan Cheng 4eb7af9bc9 Added support to STORE and shifts to DAG to DAG isel.
llvm-svn: 24525
2005-11-30 02:51:20 +00:00
Chris Lattner 3f0f71b92b Add load and other support to the dag-dag isel. Patch contributed by Evan
Cheng!

llvm-svn: 24419
2005-11-19 02:11:08 +00:00
Chris Lattner 5930d3df3d Add patterns for several simple instructions that take i32 immediates.
Patch contributed by Evan Cheng!

llvm-svn: 24382
2005-11-16 22:59:19 +00:00
Chris Lattner 655e7dfd0d initial step at adding a dag-to-dag isel for X86 backend. Patch contributed
by Evan Cheng!

llvm-svn: 24371
2005-11-16 01:54:32 +00:00