Displaying 5 results from an estimated 5 matches for "code_block8".
2013 Jul 05
0
[LLVMdev] Enabling vectorization with LLVM 3.3 for a DSL emitting LLVM IR
...nsforms allocas into SSA variables) does not get rid of the “i” variable (later passes do but leave this odd IR around) because “i”’s alloca is not in the entry block - it only works on allocas in the entry block.
opt -O3 -vectorize-loops -debug-only=loop-vectorize < test.ll
LV: Found a loop: code_block8
LV: Found an induction variable.
LV: PHI is not a poly recurrence.
LV: Found an unidentified PHI. %storemerge8 = phi i32 [ 0, %code_block8.lr.ph ], [ %next_index, %code_block8 ]
LV: Can't vectorize the instructions or CFG
LV: Not vectorizing.
IR coming into the vectorizer:
code_block8:...
2013 Jul 05
2
[LLVMdev] Enabling vectorization with LLVM 3.3 for a DSL emitting LLVM IR
Le 5 juil. 2013 à 04:11, Tobias Grosser <tobias at grosser.es> a écrit :
> On 07/04/2013 01:39 PM, Stéphane Letz wrote:
>> Hi,
>>
>> Our DSL can generate C or directly generate LLVM IR. With LLVM 3.3, we can vectorize the C produced code using clang with -O3, or clang with -O1 then opt -O3 -vectorize-loops. But the same program generating LLVM IR version cannot be
2013 Jul 05
2
[LLVMdev] Enabling vectorization with LLVM 3.3 for a DSL emitting LLVM IR
...SSA variables) does not get rid of the “i” variable (later passes do but leave this odd IR around) because “i”’s alloca is not in the entry block - it only works on allocas in the entry block.
>
> opt -O3 -vectorize-loops -debug-only=loop-vectorize < test.ll
>
> LV: Found a loop: code_block8
> LV: Found an induction variable.
> LV: PHI is not a poly recurrence.
> LV: Found an unidentified PHI. %storemerge8 = phi i32 [ 0, %code_block8.lr.ph ], [ %next_index, %code_block8 ]
> LV: Can't vectorize the instructions or CFG
> LV: Not vectorizing.
>
> IR coming into...
2013 Jul 05
0
[LLVMdev] Enabling vectorization with LLVM 3.3 for a DSL emitting LLVM IR
On 07/04/2013 01:39 PM, Stéphane Letz wrote:
> Hi,
>
> Our DSL can generate C or directly generate LLVM IR. With LLVM 3.3, we can vectorize the C produced code using clang with -O3, or clang with -O1 then opt -O3 -vectorize-loops. But the same program generating LLVM IR version cannot be vectorized with opt -O3 -vectorize-loops. So our guess is that our generated LLVM IR lacks some
2013 Jul 04
3
[LLVMdev] Enabling vectorization with LLVM 3.3 for a DSL emitting LLVM IR
Hi,
Our DSL can generate C or directly generate LLVM IR. With LLVM 3.3, we can vectorize the C produced code using clang with -O3, or clang with -O1 then opt -O3 -vectorize-loops. But the same program generating LLVM IR version cannot be vectorized with opt -O3 -vectorize-loops. So our guess is that our generated LLVM IR lacks some informations that are needed by the vectorization passes to