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| author | Eli Friedman <eli.friedman@gmail.com> | 2010-06-03 03:49:50 +0000 |
|---|---|---|
| committer | Eli Friedman <eli.friedman@gmail.com> | 2010-06-03 03:49:50 +0000 |
| commit | 268637ed0f34e10e4125e94c44ff3e2975a19166 (patch) | |
| tree | 610f0a9753ebeb3ed25fd52c3e281b60d66c0a3e /lib/CodeGen/SelectionDAG/LegalizeTypes.h | |
| parent | db1bf34178aec96559cf2e7190accc484c85d3e2 (diff) | |
| download | llvm-268637ed0f34e10e4125e94c44ff3e2975a19166.tar.gz llvm-268637ed0f34e10e4125e94c44ff3e2975a19166.tar.bz2 llvm-268637ed0f34e10e4125e94c44ff3e2975a19166.tar.xz | |
Implement expansion in type legalization for add/sub with overflow. The
expansion is the same as that used by LegalizeDAG.
The resulting code sucks in terms of performance/codesize on x86-32 for a
64-bit operation; I haven't looked into whether different expansions might be
better in general.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105378 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/SelectionDAG/LegalizeTypes.h')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/LegalizeTypes.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/lib/CodeGen/SelectionDAG/LegalizeTypes.h b/lib/CodeGen/SelectionDAG/LegalizeTypes.h index db5e2a1a11..bd86694446 100644 --- a/lib/CodeGen/SelectionDAG/LegalizeTypes.h +++ b/lib/CodeGen/SelectionDAG/LegalizeTypes.h @@ -345,6 +345,9 @@ private: void ExpandIntRes_UREM (SDNode *N, SDValue &Lo, SDValue &Hi); void ExpandIntRes_Shift (SDNode *N, SDValue &Lo, SDValue &Hi); + void ExpandIntRes_SADDSUBO (SDNode *N, SDValue &Lo, SDValue &Hi); + void ExpandIntRes_UADDSUBO (SDNode *N, SDValue &Lo, SDValue &Hi); + void ExpandShiftByConstant(SDNode *N, unsigned Amt, SDValue &Lo, SDValue &Hi); bool ExpandShiftWithKnownAmountBit(SDNode *N, SDValue &Lo, SDValue &Hi); |