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| author | Owen Anderson <resistor@mac.com> | 2010-09-21 20:42:50 +0000 |
|---|---|---|
| committer | Owen Anderson <resistor@mac.com> | 2010-09-21 20:42:50 +0000 |
| commit | bc146b0a4dcee601459eee943b4133d3cf63f1dd (patch) | |
| tree | c57d1b25209b8be14d531b49a1fc0221eefbc2cd /lib/Target/X86/X86ISelLowering.h | |
| parent | 78d3af47f532d67611e7d625b505fa832d713a26 (diff) | |
| download | external_llvm-bc146b0a4dcee601459eee943b4133d3cf63f1dd.zip external_llvm-bc146b0a4dcee601459eee943b4133d3cf63f1dd.tar.gz external_llvm-bc146b0a4dcee601459eee943b4133d3cf63f1dd.tar.bz2 | |
Reimplement r114460 in target-independent DAGCombine rather than target-dependent, by using
the predicate to discover the number of sign bits. Enhance X86's target lowering to provide
a useful response to this query.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@114473 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/X86/X86ISelLowering.h')
| -rw-r--r-- | lib/Target/X86/X86ISelLowering.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/lib/Target/X86/X86ISelLowering.h b/lib/Target/X86/X86ISelLowering.h index 6e6f25c..9bb5f64 100644 --- a/lib/Target/X86/X86ISelLowering.h +++ b/lib/Target/X86/X86ISelLowering.h @@ -523,6 +523,11 @@ namespace llvm { const SelectionDAG &DAG, unsigned Depth = 0) const; + // ComputeNumSignBitsForTargetNode - Determine the number of bits in the + // operation that are sign bits. + virtual unsigned ComputeNumSignBitsForTargetNode(SDValue Op, + unsigned Depth) const; + virtual bool isGAPlusOffset(SDNode *N, const GlobalValue* &GA, int64_t &Offset) const; |