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Stop trying to merge identical jump tables. This had been inadvertently

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disabled for several months (since svn r88806) and no one noticed.  My fix
for pr6543 yesterday reenabled it, but broke the ARM port's code for using
TBB/TBH.  Rather than adding a target hook to disable merging for Thumb2 only,
I'm just taking this out.  It is not common to have identical jump tables,
the code we used to merge them was O(N^2), and it only helps code size, not
performance.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98977 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bob Wilson
2010-03-19 19:05:41 +00:00
parent 602b40f0d0
commit 80d23705e6
3 changed files with 6 additions and 43 deletions
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4
include/llvm/CodeGen/MachineJumpTableInfo.h
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@@ -87,10 +87,6 @@ public:
///
unsigned createJumpTableIndex(const std::vector<MachineBasicBlock*> &DestBBs);
/// getJumpTableIndex - Return the index for an existing jump table.
///
unsigned getJumpTableIndex(const std::vector<MachineBasicBlock*> &DestBBs);
/// isEmpty - Return true if there are no jump tables.
///
bool isEmpty() const { return JumpTables.empty(); }