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Function names should be camel case, and start with a lower case letter. No
functional change intended.
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This is still a work in progress.
Out-of-order CPUs usually execute instructions from multiple basic
blocks simultaneously, so it is necessary to look at longer traces when
estimating the performance effects of code transformations.
The MachineTraceMetrics analysis will pick a typical trace through a
given basic block and provide performance metrics for the trace. Metrics
will include:
- Instruction count through the trace.
- Issue count per functional unit.
- Critical path length, and per-instruction 'slack'.
These metrics can be used to determine the performance limiting factor
when executing the trace, and how it will be affected by a code
transformation.
Initially, this will be used by the early if-conversion pass.
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This simplifies MCRegisterInfo and shrinks the target descriptions a bit
more.
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original commit msg:
MemoryBuiltins: add support to determine the size of strdup'ed non-constant strings
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strings
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creating a call to a library function.
Update all clients to pass the TLI information around.
Previous draft reviewed by Eli.
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struct s {
double x1;
float x2;
};
__attribute__((regparm(3))) struct s f(int a, int b, int c);
void g(void) {
f(41, 42, 43);
}
We need to be able to represent passing the address of s to f (sret) in a
register (inreg). Turns out that all that is needed is to not mark them as
mutually incompatible.
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fputc, memchr, memcmp, putchar, puts, strchr, strncmp
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Patch by Sid Manning!
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the comparison. This prevents large unsigned integers from being equal to
signed negative integers of the same bit width.
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cmake: Add LLVM_HOSTTRIPLE. For now, it is same as TARGET_TRIPLE.
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Test case will be added later when long branch patch is checked in.
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discussed 2 months ago or so.
Make sure we do not emit index computations with NSW flags so that we dont get an undef value if the GEP overflows
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belongs. I dunno why in the world I dropped it in the Scalar folder in the first place.
No functionality change.
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clang's -Wunused-private-field.
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be passed into multiclasses that take DAGOperands as multiclass parameters.
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(instead of basenames) from DWARF. Use this behavior in llvm-dwarfdump tool.
Reviewed by Benjamin Kramer.
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For a measure of safety, this conversion is only permitted if the
stored pointer type can also be created from a const void *.
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- section types
- dynamic table entries tags
- state flags for DT_FLAGS_1 entry
The patch reviewed by Rafael Espindola.
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Expression trees may be DAGs. Make sure traversal has linear complexity.
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These functions have obviously never been used before.
They should be identical to the idf_ext_iterator counterparts.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@160381 91177308-0d34-0410-b5e6-96231b3b80d8
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Make it possible to prune individual graph edges from a post-order
traversal by specializing the po_iterator_storage template. Previously,
it was only possible to prune full graph nodes. Edge pruning makes it
possible to remove loop back-edges, for example.
Also replace the existing DFSetTraits customization hook with a
po_iterator_storage method for observing the post-order. DFSetTraits was
only used by LoopIterator.h which now provides a po_iterator_storage
specialization.
Thanks to Sean and Chandler for reviewing.
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Define a 'null_frag' SDPatternOperator node, which if referenced in an
instruction Pattern, results in the pattern being collapsed to be as-if
'[]' had been specified instead. This allows supporting a multiclass
definition where some instaniations have ISel patterns associated and
others do not.
For example,
multiclass myMulti<RegisterClass rc, SDPatternOperator OpNode = null_frag> {
def _x : myI<(outs rc:), (ins rc:), []>;
def _r : myI<(outs rc:), (ins rc:), [(set rc:, (OpNode rc:))]>;
}
defm foo : myMulti<GRa, not>;
defm bar : myMulti<GRb>;
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The first variant accepts immediate number as the second argument.
The second variant accepts register operand as the second argument.
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This reverts commit 600f7a90f3eef4c5108179b43e27cfd9e5de7cdc.
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Added a basic unit test for this with CreateCondBr. I didn't go all the
way and test the switch side as the boilerplate for setting up the
switch IRBuilder unit tests is a lot more. Fortunately, the two share
all the interesting code paths.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@160251 91177308-0d34-0410-b5e6-96231b3b80d8
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the move of *Builder classes into the Core library.
No uses of this builder in Clang or DragonEgg I could find.
If there is a desire to have an IR-building-support library that
contains all of these builders, that can be easily added, but currently
it seems likely that these add no real overhead to VMCore.
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IRBuilder, DIBuilder, etc.
This is the proper layering as MDBuilder can't be used (or implemented)
without the Core Metadata representation.
Patches to Clang and Dragonegg coming up.
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Add a micro-optimization to getNode of CONCAT_VECTORS when both operands are undefs.
Can't find a testcase for this because VECTOR_SHUFFLE already handles undef operands, but Duncan suggested that we add this.
Together with Michael Kuperstein <michael.m.kuperstein@intel.com>
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APInt/APSInt classes.
Part of rdar://11875995
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All SCEV expressions used by LSR formulae must be safe to
expand. i.e. they may not contain UDiv unless we can prove nonzero
denominator.
Fixes PR11356: LSR hoists UDiv.
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