------- Additional Comments From rth at gcc dot gnu dot org 2005-02-07 23:36 ------- Subject: Re: [4.0 Regression] 10% increase in codesize with C code compared to GCC 3.3
On Mon, Feb 07, 2005 at 11:13:27PM -0000, steven at gcc dot gnu dot org wrote: > x = a + b; > x = x * a; > x = x * b; ... > After Coalescing: ... > Partition 2 (x_3 - 3 ) > Partition 3 (x_4 - 4 ) > Partition 4 (x_5 - 5 ) That is curious. Certainly not the way I'd have expected things to work. Why are we not coalescing here? Do we think that x_4 as an input to the same insn that creates x_5 means that the two conflict? Unless someone can convince me otherwise, I'd call this a bug. r~ -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17549
