Quentin Colombet 75c9433b49 [DAGCombiner] insert_vector_elt: Avoid building a vector twice. ...

This patch prevents the following combine when the input vector is used more
than once.
insert_vector_elt (build_vector elt0, ..., eltN), NewEltIdx, idx
=>
build_vector elt0, ..., NewEltIdx, ..., eltN 

The reasons are:
- Building a vector may be expensive, so try to reuse the existing part of a
  vector instead of creating a new one (think big vectors).
- elt0 to eltN now have two users instead of one. This may prevent some other
  optimizations.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187396 91177308-0d34-0410-b5e6-96231b3b80d8

2013-07-30 00:24:09 +00:00

..

AArch64

AArch64: add llc-based tests for previous commit.

2013-07-25 16:23:55 +00:00

ARM

[DAGCombiner] insert_vector_elt: Avoid building a vector twice.

2013-07-30 00:24:09 +00:00

CPP

…

Generic

…

Hexagon

Debug Info Verifier: verify SPs in llvm.dbg.sp.

2013-07-27 01:26:08 +00:00

Inputs

Debug Info Verifier: verify SPs in llvm.dbg.sp.

2013-07-27 01:26:08 +00:00

Mips

[mips] Implement llvm.trap intrinsic.

2013-07-26 20:58:55 +00:00

MSP430

Use conventional syntax for branches.

2013-07-14 18:19:44 +00:00

NVPTX

Add a target legalize hook for SplitVectorOperand (again)

2013-07-26 13:28:29 +00:00

PowerPC

PPC32 va_list is an actual structure so va_copy needs to copy the whole

2013-07-25 21:36:47 +00:00

R600

[DAGCombiner] insert_vector_elt: Avoid building a vector twice.

2013-07-30 00:24:09 +00:00

SI

…

SPARC

Allocate local registers in order for optimal coloring.

2013-07-25 18:35:14 +00:00

SystemZ

[SystemZ] Rework compare and branch support

2013-07-25 09:34:38 +00:00

Thumb

Debug Info: update testing cases to pass verifier.

2013-07-29 18:12:58 +00:00

Thumb2

Refactor AnalyzeBranch on ARM. The previous version did not always analyze

2013-07-19 23:52:47 +00:00

X86

[DAGCombiner] insert_vector_elt: Avoid building a vector twice.

2013-07-30 00:24:09 +00:00

XCore

Disambiguate function names in some CodeGen tests. (Some tests were using function names that also were names of instructions and/or doing other unusual things that were making the test not amenable to otherwise scriptable pattern matching.) No functionality change.

2013-07-18 22:29:15 +00:00