as llc + llvm-mc. This time ELF is not changed and I tested that llvm-gcc
bootstrap on darwin10 using darwin9's assembler and linker.
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foo = a - b
.long foo
instead of just
.long a - b
First, on darwin9 64 bits the assembler produces the wrong result. Second,
if "a" is the end of the section all darwin assemblers (9, 10 and mc) will not
consider a - b to be a constant but will if the dummy foo is created.
Split how we handle these cases. The first one is something MC should take care
of. The second one has to be handled by the caller.
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- I'm leaving MachO.h, because I believe it has external consumers, but I would really like to eliminate it (we have stylistic disagreements with one another).
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these instructions to be encoded with getMachineOpValue.
This unbreaks ExecutionEngine/2003-01-04-ArgumentBug.ll
when running on a G5
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directly on the mac. This is very early, doesn't support relocations and
has a terrible hack to avoid .machine from being printed, but despite
that it generates an bitwise-identical-to-cctools .o file for stuff like
this:
define i32 @test() nounwind { ret i32 42 }
I don't plan to continue pushing this forward, but if anyone else was
interested in doing it, it should be really straight-forward.
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into the immediate field. This allows us to encode stuff like this:
lbz r3, lo16(__ZL4init)(r4) ; globalopt.cpp:5
; encoding: [0x88,0x64,A,A]
; fixup A - offset: 0, value: lo16(__ZL4init), kind: fixup_ppc_lo16
stw r3, lo16(__ZL1s)(r5) ; globalopt.cpp:6
; encoding: [0x90,0x65,A,A]
; fixup A - offset: 0, value: lo16(__ZL1s), kind: fixup_ppc_lo16
With this, we should have a completely function MCCodeEmitter for PPC, wewt.
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modes. For example, we now get:
ld r3, lo16(_G)(r3) ; encoding: [0xe8,0x63,A,0bAAAAAA00]
; fixup A - offset: 0, value: lo16(_G), kind: fixup_ppc_lo14
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as direct calls. Change conditional branches to encode with
their own method, simplifying the JIT encoder and making room
for adding an mc fixup.
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code in the JIT. Use this to form the first fixup for the PPC backend,
giving us stuff like this:
bl L_foo$stub ; encoding: [0b010010AA,A,A,0bAAAAAA01]
; fixup A - offset: 0, value: L_foo$stub, kind: fixup_ppc_br24
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The only change in the output is:
1) we get a better comment on mfcr, we get:
mfcr r2 ; cr2
instead of:
mfcr r2 ; 32
2) we no longer emit $stub's on powerpc/leopard. The Leopard
linker autosynthesizes them.
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different ways. Add $non_lazy_ptr support, and proper lowering for
global values.
Now all the ppc regression tests pass with the new instruction printer.
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nodes to indicate when ha16/lo16 modifiers should be used. This lets
us pass PowerPC/indirectbr.ll.
The one annoying thing about this patch is that the MCSymbolExpr isn't
expressive enough to represent ha16(label1-label2) which we need on
PowerPC. I have a terrible hack in the meantime, but this will have
to be revisited at some point.
Last major conversion item left is global variable references.
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and have isel apply to to call operands as required. This allows
us to get $stub suffixes on label references on ppc/tiger with the
new instprinter, fixing two tests. Only 2 to go.
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since it is trivial and will be shared between ppc and x86.
This substantially simplifies the X86 backend also.
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on the operand, required for .o file writing and fixing
the PowerPC/mult-alt-generic-powerpc64.ll failure with the new
instprinter.
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