Commit graph

64 commits

Author SHA1 Message Date
Lioncash
87083af733 general: Remove trailing spaces
General code-related cleanup. Gets rid of trailing spaces in the
codebase.
2020-04-22 21:04:21 +01:00
Lioncash
1f6878fb46 ir_opt/verification_pass: Add include for std::puts
Ensures that the header dependency is always satisfied directly, and not
through other project headers. While we're at it, we can qualify the
call with the std:: namespace.
2020-04-22 21:03:38 +01:00
Lioncash
fc9c59d056 ir_opt/verification_pass: Eliminate redundant GetArg()
Given the same argument is used inside the condition's body if it's
true, we can just utilize the local to cut out a GetArg() operation.
Avoids redundant internal assertion checking.
2020-04-22 21:03:35 +01:00
Lioncash
cfd7513a7d ir_opt/verification_pass: Mark locals as const where applicable
Makes our immutable state a little more explicit.
2020-04-22 21:01:40 +01:00
Lioncash
1a45f35b9c ir_opt/a64_callback_config_pass: Mark locals as const where applicable
Makes our immutable state a little more explicit.
2020-04-22 21:00:47 +01:00
Lioncash
dc97977576 ir_opt/a32_get_set_elimination_pass: Mark local variables as const where applicable
Makes our intended immutable state slightly more explicit.
2020-04-22 21:00:47 +01:00
Lioncash
7d535eaba6 ir_opt/a32_constant_memory_reads_pass: Apply const where applicable to locals
Makes immutable state just slightly more explicit.
2020-04-22 21:00:47 +01:00
Lioncash
6aed4036ef ir_opt/a64_get_set_elimination_pass: Add handling for NZCV raw get and set operations 2020-04-22 20:58:11 +01:00
Lioncash
575ae852a9 constant_propagation_pass: Fold byte reversal opcodes where applicable
These are reasonably trivial to fold away when applicable. We just
perform the swap and replace the instruction with the constant value.
2020-04-22 20:57:37 +01:00
Lioncash
d302d9bd0c constant_propagation_pass: Handle folding for Least/MostSignificant{Bit, Byte, Half, Word} opcodes
These are quite trivial to fold.
2020-04-22 20:57:37 +01:00
Lioncash
07c197e8d0 constant_propagation_pass: Add 64-bit variants of shifts to the pass
These optimizations can also apply to the 64-bit variants of the shift
opcodes; we just need to check if the instruction has an associated
pseudo-op before performing the 32-bit variant's specifics.

While we're at it, we can also relocate the code to its own function
like the rest of the cases to keep organization consistent.
2020-04-22 20:57:37 +01:00
Lioncash
8248999c5d constant_propagation_pass: Fold division operations where applicable
We can fold division operations if:

1. The divisor is zero, then we can replace the result with zero (as this is how
ARM platforms expect it).
2. Both values are known, in which case we can just do the operation and
store the result
3. The divisor is 1, in which case just return the other operand.
2020-04-22 20:57:37 +01:00
Lioncash
7ad6981437 constant_propagation_pass: deduplicate common 32/64 bit checking for results in folding functions
It's common for an folding operation to apply to both the 32-bit and
64-bit variant of the same opcode, which leads to checking which kind of
result we need to store the value as. This moves it to its own function,
so that we don't need to duplicate it in various functions.
2020-04-22 20:57:37 +01:00
Lioncash
72daf37208 constant_propagation_pass: Fold Mul32 and Mul64 cases where applicable
Multiplication operations can currently be folded if:

1. Both arguments are known constant values
2. Either operand is zero (in which case the result is also zero)
3. Either operand is one (in which case the result is the non-one
operand).
2020-04-22 20:57:37 +01:00
Lioncash
43b2eb4688 constant_propagation_pass: Fold SignExtend{Type}ToLong opcodes if possible 2020-04-22 20:57:37 +01:00
Lioncash
2da2cf9058 constant_propagation_pass: Fold SignExtend{Type}ToWord opcodes if possible 2020-04-22 20:57:37 +01:00
Lioncash
c42f6ea184 constant_propagation_pass: Fold ZeroExtend{Type}ToLong opcodes if possible
These are equivalent to the ZeroExtendXToWord variants, so we can
trivially do this as well.
2020-04-22 20:57:37 +01:00
Lioncash
2274214ff0 constant_propagation_pass: Combine zero-extension folding code into its own function
Separates the behavior from the actual switch statement and gets rid of
duplication, now that we can use the general GetImmediateAsU64()
function.
2020-04-22 20:57:37 +01:00
Lioncash
4a3c064b15 ir/value: Add an IsZero() member function to Value's interface
By far, one of the most common things to check for is whether or not a
value is zero, as it typically allows folding away unnecesary
operations (other close contenders that can help with eliding operations  are 1 and -1).

So instead of requiring a check for an immediate and then actually
retrieving the integral value and checking it, we can wrap it within a
function to make it more convenient.
2020-04-22 20:57:37 +01:00
Lioncash
c09f4cf28e constant_propagation_pass: Fold NOT operations 2020-04-22 20:55:50 +01:00
Lioncash
8013548bbb constant_propagation_pass: Fold OR operations 2020-04-22 20:55:50 +01:00
Lioncash
898d096e39 constant_propagation_pass: Fold AND operations 2020-04-22 20:55:50 +01:00
Lioncash
0ea99b7d59 constant_propagation_pass: Fold EOR operations
It's possible to fold cases of exclusive OR operations if they can be
known to be an identity operation, or if both operands happen to be known
immediates, in which case we can just store the result of the
exclusive-OR directly.
2020-04-22 20:55:50 +01:00
Lioncash
134bb02e19 ir/value: Replace includes with forward declarations
enum classes are still considered complete types when forward declared
(as the compiler knows the exact size of the type from the declaration
alone). The only difference in this case being that the members of the
enum class aren't visible. Given we don't use the members within this
header in any way, we can simply forward declare them here and remove
the inclusions.
2020-04-22 20:55:05 +01:00
Lioncash
6bcfdba1ad general: Remove unused lambda captures
Resolves warnings that occur in Xcode 9.3
2020-04-22 20:46:16 +01:00
Lioncash
7371e63a7b a64_get_set_elimination_pass: Make TrackingType enum an enum class
Prevents placing single letter enum members into the surrounding scope.
2020-04-22 20:46:15 +01:00
MerryMage
5edd623b9d Implement DC instructions 2020-04-22 20:46:14 +01:00
MerryMage
f378d2ef1b Forward declare IR::Opcode and IR::Type where possible 2020-04-22 20:46:14 +01:00
MerryMage
98ec9c5f90 A32: Change UserCallbacks to be similar to A64's interface 2020-04-22 20:46:12 +01:00
MerryMage
f4f774f9f6 a64_get_set_elimination_pass: Simplify algorithm 2020-04-22 20:46:12 +01:00
MerryMage
6fc228f7fd ir_opt: Add A64 Get/Set Elimination Pass 2020-04-22 20:46:12 +01:00
Lioncash
67443efb62 General: Convert multiple namespace specifiers to nested namespace specifiers where applicable
Makes namespacing a little less noisy
2020-04-22 20:44:38 +01:00
MerryMage
4e3675da7b a64_merge_interpret_blocks: Remove debug output 2020-04-22 20:42:45 +01:00
MerryMage
c6a091d874 A64: Optimization: Merge interpret blocks 2020-04-22 20:42:45 +01:00
MerryMage
72a793f5b0 ir_opt: Split off A32 specific passes 2020-04-22 20:42:45 +01:00
MerryMage
d1cef6ffb0 A64: Implement ADD_shifted 2020-04-22 20:42:44 +01:00
MerryMage
9d15e0a8e1 Final A32 refactor 2020-04-22 20:39:27 +01:00
MerryMage
8bef20c24d IR: Split off A32 specific opcodes 2020-04-22 20:33:32 +01:00
MerryMage
b3c73e2622 Label A32 specific code appropriately 2020-04-22 20:33:30 +01:00
MerryMage
157585887e ir_opt: Simplify dead-code elimination pass 2017-02-26 15:28:34 +00:00
MerryMage
bbeea72eba ir_opt: Remove redundant shift instructions 2017-02-26 15:28:14 +00:00
MerryMage
a0e9417912 ir_opt: Initial constant propagation pass implementation 2017-01-30 21:49:46 +00:00
Mat M
de1f831d79 microinstruction: Make use_count private (#53)
Makes the operation a part of the direct interface.
2016-11-30 21:51:06 +00:00
MerryMage
b6f7b8babd ir: Implement GetGEFlags, SetGEFlags 2016-11-23 19:44:27 +00:00
MerryMage
e7d02a5439 get_set_elimination_pass: Refactor CPSR related eliminations 2016-11-23 18:42:13 +00:00
Mat M
7f9a0c3c38 Remove unnecessary explicit includes (#16) 2016-09-03 21:48:03 +01:00
Mat M
d16badbc04 get_set_elimination_pass: Replace decltype with direct type retrieval (#9) 2016-09-02 17:30:21 +01:00
Lioncash
0e12fb6a56 basic_block: Move all variables behind a public interface 2016-08-25 16:14:37 +01:00
MerryMage
c8b2f63c93 get_set_elimination_pass: Eliminate unnecessary gets/sets of extended registers 2016-08-23 15:57:20 +01:00
MerryMage
34cffa86a4 dead_code_elimination_pass: Update to use IR::Inst::MayHaveSideEffects 2016-08-23 13:12:14 +01:00