Displaying 3 results from an estimated 3 matches for "jumpisexpensive".
2014 Aug 07
3
[LLVMdev] Proposal: Add a target lowering hook to state that target supports floating point exception behavior.
...;
case ISD::FCOPYSIGN:
V1.copySign(V2);
Index: lib/CodeGen/TargetLoweringBase.cpp
===================================================================
--- lib/CodeGen/TargetLoweringBase.cpp (revision 215148)
+++ lib/CodeGen/TargetLoweringBase.cpp (working copy)
@@ -705,6 +705,7 @@
JumpIsExpensive = false;
PredictableSelectIsExpensive = false;
MaskAndBranchFoldingIsLegal = false;
+ FloatingPointExceptions = true;
StackPointerRegisterToSaveRestore = 0;
ExceptionPointerRegister = 0;
ExceptionSelectorRegister = 0;
2014 Aug 08
3
[LLVMdev] Proposal: Add a target lowering hook to state that target supports floating point exception behavior.
...>> Index: lib/CodeGen/TargetLoweringBase.cpp
>> ===================================================================
>> --- lib/CodeGen/TargetLoweringBase.cpp (revision 215148)
>> +++ lib/CodeGen/TargetLoweringBase.cpp (working copy)
>> @@ -705,6 +705,7 @@
>> JumpIsExpensive = false;
>> PredictableSelectIsExpensive = false;
>> MaskAndBranchFoldingIsLegal = false;
>> + FloatingPointExceptions = true;
>> StackPointerRegisterToSaveRestore = 0;
>> ExceptionPointerRegister = 0;
>> ExceptionSelectorRegister = 0;
>>
>&g...
2010 Jul 22
0
[LLVMdev] SelectionDAGBuilder doing bad things on certain architectures
...ormance and removing the extra 'and' or 'or' in order to short circuit the conditional evaluation does not work for our target.
So in order to make this type of instruction rely more on target specific information. I've added a new Boolean to the TargetLoweringInfo class called JumpIsExpensive along with accessor functions.
Please review the patch and apply if acceptable.
Thanks,
Micah
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