Dear guys,
After compiling 188.ammp, one of spec floating point benchmarks,
using the linear scan register allocator, I got 34 spills, but only
28 store instructions. These data were given by -stats. Is this number
correct? I mean, the number of stores should be equal or greater than
the number of spills, shouldn't it?
Best regards,
Fernando
On Wed, 4 Oct 2006, Fernando Magno Quintao Pereira wrote:> After compiling 188.ammp, one of spec floating point benchmarks, > using the linear scan register allocator, I got 34 spills, but only > 28 store instructions. These data were given by -stats. Is this number > correct? I mean, the number of stores should be equal or greater than > the number of spills, shouldn't it?Some spill code gets folded into instructions. For example, if you have: vreg1234 += 7 they can be spilled to: [esp + 123] += 7 on x86. -Chris -- nondot.org/sabre llvm.org