[LLVMdev] LICM
Marc Brünink
marc at bruenink.de
Tue Oct 27 05:31:18 PDT 2009
Hi all,
I just noticed that LICM does not hoist/sink the following store out of
the loop:
int array[20];
int i;
for (i = 0; i<100; i++) {
array [0] = 0;
}
The getElementPtr instruction is hoisted out of the loop; the store is
not. Did I miss something obvious? Bitcode file attached.
Generated using LLVM 2.5 and
llvm-gcc -c -emit-llvm test_loop.c -o - | opt -licm -o test.bc -f
Thanks
Marc
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