Commit Graph

7 Commits

Author SHA1 Message Date
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
Dan Gohman c8054d90fb Eliminate more uses of llvm-as and llvm-dis.
llvm-svn: 81293
2009-09-09 00:09:15 +00:00
Evan Cheng 475f8a4fa2 Enable Thumb2 instruction shrinking (32-bit to 16-bit) pass. Convert a bunch of thumb2 tests to FileCheck.
llvm-svn: 78622
2009-08-10 23:56:04 +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
Daniel Dunbar a720af1370 More spelling Count as count.
llvm-svn: 74306
2009-06-26 18:35:07 +00:00
David Goodwin 3bd42afebe Add Thumb-2 tests.
llvm-svn: 74295
2009-06-26 18:10:30 +00:00