[LLVMdev] opt, llcc, ll++, -O1, -O2, -O3

[Chris Lattner]

On Wed, 5 May 2004, [koi8-r] "Valery A.Khamenya[koi8-r] "  wrote:

> hi all,
>
> well, i have set up proper command line parameters for
> for C-Shootout tests to get reasonable running time
> for benchmarking. I have compared "gcc -O3" and
> "llvmgcc -Wl,-native-cbe"

Cool.  Each of these benchmarks has a default problem size for when no
arguments are specified (take a look in the main for each benchmark).  If
you could modify the benchmark programs to default to the sizes you
specified, and send me the diff, I would be happy to apply it.  :)

-Chris

> here goes output (which shows that llvm is already
> better for test with intensive function calls):
>
> time -p ./gcc_ackermann 11
> user 2.36
> time -p ./llvm_ackermann 11
> user 1.07
>
> ----
> time -p ./gcc_ary3 300000
> user 2.86
> time -p ./llvm_ary3 300000
> user 3.19
>
> ----
> time -p ./gcc_fib2 39
> user 2.32
> time -p ./llvm_fib2 39
> user 1.61
>
> ----
> time -p ./gcc_hash 1000000
> user 2.26
> time -p ./llvm_hash 1000000
> user 2.30
>
> ----
> time -p ./gcc_heapsort 2000000
> user 2.57
> time -p ./llvm_heapsort 2000000
> user 3.26
>
> ----
> time -p ./gcc_lists 500000
> user 2.70
> time -p ./llvm_lists 500000
> user 3.27
>
> ----
> time -p ./gcc_matrix 500000
> user 2.61
> time -p ./llvm_matrix 500000
> user 4.17
>
> ----
> time -p ./gcc_methcall 90000000
> user 2.83
> time -p ./llvm_methcall 90000000
> user 2.89
>
> ----
> time -p ./gcc_nestedloop 33
> user 2.40
> time -p ./llvm_nestedloop 33
> user 3.66
>
> ----
> time -p ./gcc_objinst 10000000
> user 2.25
> time -p ./llvm_objinst 10000000
> user 2.12
>
> ----
> time -p ./gcc_random 60000000
> user 2.42
> time -p ./llvm_random 60000000
> user 2.42
>
> ----
> time -p ./gcc_sieve 25000
> user 2.41
> time -p ./llvm_sieve 25000
> user 4.36
>
> ----
> time -p ./gcc_strcat 50000000
> user 2.77
> time -p ./llvm_strcat 50000000
> user 3.98
>
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-Chris

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