c177813755
bfi A, (and B, C1), C2) -> bfi A, B, C2 iff C1 & C2 == C1. rdar://8458663
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llvm-svn: 121746
2010-12-14 03:22:07 +00:00
3434575704
(or (and (shl A, #shamt), mask), B) => ARMbfi B, A, ~mask where lsb(mask) == #shamt. rdar://8752056
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llvm-svn: 121606
2010-12-11 04:11:38 +00:00
6d800f88da
Update tests to handle MC-inst instruction printing of shift operations. The
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legacy asm printer uses instructions of the form, "mov r0, r0, lsl #3", while
the MC-instruction printer uses the form "lsl r0, r0, #3". The latter mnemonic
is correct and preferred according the ARM documentation (A8.6.98). The former
are pseudo-instructions for the latter.
llvm-svn: 114221
2010-09-17 21:58:46 +00:00
b97e2bbe32
Add combiner patterns to more effectively utilize the BFI (bitfield insert)
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instruction for non-constant operands. This includes the case referenced
in the README.txt regarding a bitfield copy.
llvm-svn: 108608
2010-07-17 03:30:54 +00:00
11013eda5a
Add basic support to code-gen the ARM/Thumb2 bit-field insert (BFI) instruction
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and a combine pattern to use it for setting a bit-field to a constant
value. More to come for non-constant stores.
llvm-svn: 108570
2010-07-16 23:05:05 +00:00
Evan Cheng