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| author | Hans Wennborg <hans@hanshq.net> | 2012-10-30 11:23:25 +0000 |
|---|---|---|
| committer | Hans Wennborg <hans@hanshq.net> | 2012-10-30 11:23:25 +0000 |
| commit | 04d7d13d301df66f6c232e41611145c062183bf3 (patch) | |
| tree | 506f923fd1e30024c1b3be9b63fcdb46f52d1f1b /include/llvm/Target | |
| parent | c588e0e162fa08c81558871fb0c50fb51569afe3 (diff) | |
| download | llvm-04d7d13d301df66f6c232e41611145c062183bf3.tar.gz llvm-04d7d13d301df66f6c232e41611145c062183bf3.tar.bz2 llvm-04d7d13d301df66f6c232e41611145c062183bf3.tar.xz | |
Use TargetTransformInfo to control switch-to-lookup table transformation
When the switch-to-lookup tables transform landed in SimplifyCFG, it
was pointed out that this could be inappropriate for some targets.
Since there was no way at the time for the pass to know anything about
the target, an awkward reverse-transform was added in CodeGenPrepare
that turned lookup tables back into switches for some targets.
This patch uses the new TargetTransformInfo to determine if a
switch should be transformed, and removes
CodeGenPrepare::ConvertLoadToSwitch.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167011 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'include/llvm/Target')
| -rw-r--r-- | include/llvm/Target/TargetTransformImpl.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/llvm/Target/TargetTransformImpl.h b/include/llvm/Target/TargetTransformImpl.h index fd4b737afd..fa1acbea08 100644 --- a/include/llvm/Target/TargetTransformImpl.h +++ b/include/llvm/Target/TargetTransformImpl.h @@ -46,6 +46,8 @@ public: virtual unsigned getJumpBufAlignment() const; virtual unsigned getJumpBufSize() const; + + virtual bool shouldBuildLookupTables() const; }; class VectorTargetTransformImpl : public VectorTargetTransformInfo { |