llvm-6502

mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-01-10 18:34:09 +00:00

History

Chris Lattner 7acc4b1281 Extend CanEvaluateZExtd to handle and/or/xor more aggressively in the

BitsToClear case.  This allows it to promote expressions which have an
and/or/xor after the lshr, promoting cases like test2 (from PR4216) 
and test3 (random extample extracted from a spec benchmark).

clang now compiles the code in PR4216 into:

_test_bitfield:                                             ## @test_bitfield
	movl	%edi, %eax
	orl	$194, %eax
	movl	$4294902010, %ecx
	andq	%rax, %rcx
	orl	$32768, %edi
	andq	$39936, %rdi
	movq	%rdi, %rax
	orq	%rcx, %rax
	ret

instead of:

_test_bitfield:                                             ## @test_bitfield
	movl	%edi, %eax
	orl	$194, %eax
	movl	$4294902010, %ecx
	andq	%rax, %rcx
	shrl	$8, %edi
	orl	$128, %edi
	shlq	$8, %rdi
	andq	$39936, %rdi
	movq	%rdi, %rax
	orq	%rcx, %rax
	ret

which is still not great, but is progress.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93145 91177308-0d34-0410-b5e6-96231b3b80d8

2010-01-11 04:05:13 +00:00

Analysis

Use WriteAsOperand instead of getName() to print loop header names,

2010-01-09 18:17:45 +00:00

Archive

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Assembler

Re-add parsing of function-local metadata; this time with testcase.

2010-01-05 22:22:14 +00:00

Bindings/Ocaml

…

Bitcode