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9c9c1158cb
CopyToReg/CopyFromReg/INLINEASM. These are annoying because
they have the same opcode before an after isel. Fix this by
setting their NodeID to -1 to indicate that they are selected,
just like what automatically happens when selecting things that
end up being machine nodes.
With that done, give IsLegalToFold a new flag that causes it to
ignore chains. This lets the HandleMergeInputChains routine be
the one place that validates chains after a match is successful,
enabling the new hotness in chain processing. This smarter
chain processing eliminates the need for "PreprocessRMW" in the
X86 and MSP430 backends and enables MSP to start matching it's
multiple mem operand instructions more aggressively.
I currently #if out the dead code in the X86 backend and MSP
backend, I'll remove it for real in a follow-on patch.
The testcase changes are:
test/CodeGen/X86/sse3.ll: we generate better code
test/CodeGen/X86/store_op_load_fold2.ll: PreprocessRMW was
miscompiling this before, we now generate correct code
Convert it to filecheck while I'm at it.
test/CodeGen/MSP430/Inst16mm.ll: Add a testcase for mem/mem
folding to make anton happy. :)
llvm-svn: 97596
25 lines
1.4 KiB
LLVM
25 lines
1.4 KiB
LLVM
; RUN: llc < %s -march=x86 -x86-asm-syntax=intel | FileCheck %s
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target datalayout = "e-p:32:32"
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%struct.Macroblock = type { i32, i32, i32, i32, i32, [8 x i32], %struct.Macroblock*, %struct.Macroblock*, i32, [2 x [4 x [4 x [2 x i32]]]], [16 x i8], [16 x i8], i32, i64, [4 x i32], [4 x i32], i64, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i16, double, i32, i32, i32, i32, i32, i32, i32, i32, i32 }
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define internal fastcc i32 @dct_chroma(i32 %uv, i32 %cr_cbp) nounwind {
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cond_true2732.preheader: ; preds = %entry
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%tmp2666 = getelementptr %struct.Macroblock* null, i32 0, i32 13 ; <i64*> [#uses=2]
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%tmp2674 = trunc i32 0 to i8 ; <i8> [#uses=1]
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%tmp2667.us.us = load i64* %tmp2666 ; <i64> [#uses=1]
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%tmp2670.us.us = load i64* null ; <i64> [#uses=1]
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%shift.upgrd.1 = zext i8 %tmp2674 to i64 ; <i64> [#uses=1]
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%tmp2675.us.us = shl i64 %tmp2670.us.us, %shift.upgrd.1 ; <i64> [#uses=1]
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%tmp2675not.us.us = xor i64 %tmp2675.us.us, -1 ; <i64> [#uses=1]
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%tmp2676.us.us = and i64 %tmp2667.us.us, %tmp2675not.us.us ; <i64> [#uses=1]
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store i64 %tmp2676.us.us, i64* %tmp2666
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ret i32 0
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; CHECK: and {{E..}}, DWORD PTR [360]
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; CHECK: and DWORD PTR [356], {{E..}}
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; CHECK: mov DWORD PTR [360], {{E..}}
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}
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