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| author | Quentin Colombet <qcolombet@apple.com> | 2013-07-30 00:24:09 +0000 |
|---|---|---|
| committer | Quentin Colombet <qcolombet@apple.com> | 2013-07-30 00:24:09 +0000 |
| commit | 75c9433b49b1e4e2d7e61249c3cd0e3ce910d5c8 (patch) | |
| tree | 8d078de34703eaec736eb7137ce1939821713c3a /test/CodeGen/R600 | |
| parent | 3466fb11b70e5512fe15c94b8da99596e69c39cf (diff) | |
| download | llvm-75c9433b49b1e4e2d7e61249c3cd0e3ce910d5c8.tar.gz llvm-75c9433b49b1e4e2d7e61249c3cd0e3ce910d5c8.tar.bz2 llvm-75c9433b49b1e4e2d7e61249c3cd0e3ce910d5c8.tar.xz | |
[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
Diffstat (limited to 'test/CodeGen/R600')
| -rw-r--r-- | test/CodeGen/R600/swizzle-export.ll | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/test/CodeGen/R600/swizzle-export.ll b/test/CodeGen/R600/swizzle-export.ll index b2175afdf0..11d2cb1349 100644 --- a/test/CodeGen/R600/swizzle-export.ll +++ b/test/CodeGen/R600/swizzle-export.ll @@ -1,4 +1,5 @@ ; RUN: llc < %s -march=r600 -mcpu=redwood | FileCheck --check-prefix=EG-CHECK %s +; XFAIL: * ;EG-CHECK: @main ;EG-CHECK: EXPORT T{{[0-9]+}}.XYXX |