Evan Cheng
3688b8fa68
Instcombine constant folding can normalize gep with negative index to index with large offset. When instcombine objsize checking transformation sees these geps where the offset seemingly point out of bound, it should just return "i don't know" rather than asserting.
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llvm-svn: 96825
2010-02-22 23:34:00 +00:00
Duncan Sands
19d0b47b1f
There are two ways of checking for a given type, for example isa<PointerType>(T)
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and T->isPointerTy(). Convert most instances of the first form to the second form.
Requested by Chris.
llvm-svn: 96344
2010-02-16 11:11:14 +00:00
Duncan Sands
9dff9bec31
Uniformize the names of type predicates: rather than having isFloatTy and
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isInteger, we now have isFloatTy and isIntegerTy. Requested by Chris!
llvm-svn: 96223
2010-02-15 16:12:20 +00:00
Eric Christopher
843a4cc43c
Fix a problem where we had bitcasted operands that gave us
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odd offsets since the bitcasted pointer size and the offset pointer
size are going to be different types for the GEP vs base object.
llvm-svn: 96134
2010-02-13 23:38:01 +00:00
Eric Christopher
cccdc13662
Make sure that ConstantExpr offsets also aren't off of extern
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symbols.
Thanks to Duncan Sands for the testcase!
llvm-svn: 95877
2010-02-11 17:44:04 +00:00
Eric Christopher
531ea566a6
Add ConstantExpr handling to Intrinsic::objectsize lowering.
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Update testcase accordingly now that we can optimize another
section.
llvm-svn: 95846
2010-02-11 01:48:54 +00:00
Eric Christopher
7b7028fd24
Move Intrinsic::objectsize lowering back to InstCombineCalls and
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enable constant 0 offset lowering.
llvm-svn: 95691
2010-02-09 21:24:27 +00:00
Eric Christopher
04371b4f12
Remove this code for now. I have a better idea and will rewrite with
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that in mind.
llvm-svn: 95402
2010-02-05 19:04:06 +00:00
Eric Christopher
107a1fbf61
Temporarily revert this since it appears to have caused a build
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failure.
llvm-svn: 95294
2010-02-04 06:41:27 +00:00
Eric Christopher
42fa84a880
Rework constant expr and array handling for objectsize instcombining.
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Fix bugs where we would compute out of bounds as in bounds, and where
we couldn't know that the linker could override the size of an array.
Add a few new testcases, change existing testcase to use a private
global array instead of extern.
llvm-svn: 95283
2010-02-04 02:55:34 +00:00
Eric Christopher
f12e18db21
If we're dealing with a zero-length array, don't lower to any
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particular size, we just don't know what the length is yet.
llvm-svn: 95266
2010-02-03 23:56:07 +00:00
Eric Christopher
d86233c118
Recommit this, looks like it wasn't the cause.
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llvm-svn: 95165
2010-02-03 00:21:58 +00:00
Eric Christopher
e67d01a9a8
Hopefully temporarily revert this.
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llvm-svn: 95154
2010-02-02 23:01:31 +00:00
Eric Christopher
f9553572b7
Reformat my last patch slightly.
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llvm-svn: 95147
2010-02-02 22:29:26 +00:00
Eric Christopher
4264e7e46f
Re-add strcmp and known size object size checking optimization.
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Passed bootstrap and nightly test run here.
llvm-svn: 95145
2010-02-02 22:10:43 +00:00
Chris Lattner
846a52e228
fix rdar://7590304, a miscompilation of objc apps on arm. The caller
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of objc message send was getting marked arm_apcscc, but the prototype
isn't. This is fine at runtime because objcmsgsend is implemented in
assembly. Only turn a mismatched caller and callee into 'unreachable'
if the callee is a definition.
llvm-svn: 94986
2010-02-01 18:11:34 +00:00
Chris Lattner
2cecedf081
fix rdar://7590304, an infinite loop in instcombine. In the invoke
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case, instcombine can't zap the invoke for fear of changing the CFG.
However, we have to do something to prevent the next iteration of
instcombine from inserting another store -> undef before the invoke
thereby getting into infinite iteration between dead store elim and
store insertion.
Just zap the callee to null, which will prevent the next iteration
from doing anything.
llvm-svn: 94985
2010-02-01 18:04:58 +00:00
Eric Christopher
5a0e174863
Revert my last couple of patches. They appear to have broken bison.
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llvm-svn: 94841
2010-01-29 21:16:24 +00:00
Eric Christopher
997f7ca8c5
Add constant support to object size handling and remove default
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lowering. We'll either figure it out, or not and be lowered by
SelectionDAGBuild.
Add test.
llvm-svn: 94775
2010-01-29 01:09:57 +00:00
Eric Christopher
4a1d7e1506
Remove unnecessary dyn_cast and add a comment. Part of a WIP.
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llvm-svn: 93026
2010-01-08 21:37:11 +00:00
Eric Christopher
2cdb806fd8
Move the object size intrinsic optimization to inst-combine and make
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it work for any integer size return type.
llvm-svn: 92853
2010-01-06 20:04:44 +00:00
Benjamin Kramer
d2564e3afb
Move remaining stuff to the isInteger predicate.
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llvm-svn: 92771
2010-01-05 21:05:54 +00:00
Chris Lattner
7a9e47ac4b
split call handling out to InstCombineCalls.cpp
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llvm-svn: 92707
2010-01-05 07:32:13 +00:00
