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8 Commits

Author SHA1 Message Date
Jakob Stoklund Olesen 589c6eb95c Remove -join-physregs from the test suite. 
This option has been disabled for a while, and it is going away so I can
clean up the coalescer code.

The tests that required physreg joining to be enabled were almost all of
the form "tiny function with interference between arguments and return
value". Such functions are usually inlined in the real world.

The problem exposed by phys_subreg_coalesce-3.ll is real, but fairly
rare.

llvm-svn: 157027
 2012-05-17 23:44:19 +00:00
Sebastian Pop 2420e8b7d5 Added missing CMN case in Thumb2SizeReduction pass so that LLVM emits 16-bits encoding of CMN instructions. 
llvm-svn: 156195
 2012-05-04 19:53:56 +00:00
Jakob Stoklund Olesen d7fd7bfc31 Explicitly request physreg coalesing for a bunch of Thumb2 unit tests. 
These tests all follow the same pattern:

	mov	r2, r0
	movs	r0, #0
	$CMP	r2, r1
	it	eq
	moveq	r0, #1
	bx	lr

The first 'mov' can be eliminated by rematerializing 'movs r0, #0' below the
test instruction:

	$CMP	r0, r1
	mov.w	r0, #0
	it	eq
	moveq	r0, #1
	bx	lr

So far, only physreg coalescing can do that. The register allocators won't yet
split live ranges just to eliminate copies. They can learn, but this particular
problem is not likely to show up in real code. It only appears because r0 is
used for both the function argument and return value.

llvm-svn: 130858
 2011-05-04 19:02:07 +00:00
Edward O'Callaghan cc856372b0 Convert Thumb2 tests to FileCheck for PR5307. 
llvm-svn: 89595
 2009-11-22 15:18:27 +00:00
Dan Gohman c8054d90fb Eliminate more uses of llvm-as and llvm-dis. 
llvm-svn: 81293
 2009-09-09 00:09:15 +00:00
David Goodwin 782f242fd7 Add ".w" suffix for wide thumb-2 instructions. 
llvm-svn: 77199
 2009-07-27 16:31:55 +00:00
David Goodwin 17512663f5 Enhance tests to include shifted-register operand testing. 
llvm-svn: 74490
 2009-06-30 01:02:20 +00:00
David Goodwin dbf11ba800 Rename ARMcmpNZ to ARMcmpZ and use it to represent comparisons that set only the Z flag (i.e. eq and ne). Make ARMcmpZ commutative. 
llvm-svn: 74423
 2009-06-29 15:33:01 +00:00