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author | Stephen Hines <srhines@google.com> | 2014-02-11 20:01:10 -0800 |
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committer | Stephen Hines <srhines@google.com> | 2014-02-11 20:01:10 -0800 |
commit | ce9904c6ea8fd669978a8eefb854b330eb9828ff (patch) | |
tree | 2418ee2e96ea220977c8fb74959192036ab5b133 /lib/Target/PowerPC/PPCTargetTransformInfo.cpp | |
parent | c27b10b198c1d9e9b51f2303994313ec2778edd7 (diff) | |
parent | dbb832b83351cec97b025b61c26536ef50c3181c (diff) | |
download | external_llvm-ce9904c6ea8fd669978a8eefb854b330eb9828ff.zip external_llvm-ce9904c6ea8fd669978a8eefb854b330eb9828ff.tar.gz external_llvm-ce9904c6ea8fd669978a8eefb854b330eb9828ff.tar.bz2 |
Merge remote-tracking branch 'upstream/release_34' into merge-20140211
Conflicts:
lib/Linker/LinkModules.cpp
lib/Support/Unix/Signals.inc
Change-Id: Ia54f291fa5dc828052d2412736e8495c1282aa64
Diffstat (limited to 'lib/Target/PowerPC/PPCTargetTransformInfo.cpp')
-rw-r--r-- | lib/Target/PowerPC/PPCTargetTransformInfo.cpp | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/lib/Target/PowerPC/PPCTargetTransformInfo.cpp b/lib/Target/PowerPC/PPCTargetTransformInfo.cpp index 2504ba7..8879630 100644 --- a/lib/Target/PowerPC/PPCTargetTransformInfo.cpp +++ b/lib/Target/PowerPC/PPCTargetTransformInfo.cpp @@ -77,6 +77,7 @@ public: /// \name Scalar TTI Implementations /// @{ virtual PopcntSupportKind getPopcntSupport(unsigned TyWidth) const; + virtual void getUnrollingPreferences(Loop *L, UnrollingPreferences &UP) const; /// @} @@ -129,6 +130,14 @@ PPCTTI::PopcntSupportKind PPCTTI::getPopcntSupport(unsigned TyWidth) const { return PSK_Software; } +void PPCTTI::getUnrollingPreferences(Loop *L, UnrollingPreferences &UP) const { + if (ST->getDarwinDirective() == PPC::DIR_A2) { + // The A2 is in-order with a deep pipeline, and concatenation unrolling + // helps expose latency-hiding opportunities to the instruction scheduler. + UP.Partial = UP.Runtime = true; + } +} + unsigned PPCTTI::getNumberOfRegisters(bool Vector) const { if (Vector && !ST->hasAltivec()) return 0; |