Include the loop header block when eliminating stack checks

Include the loop header block when eliminating stack checks

In simple unconditional loops - like the following - the hydrogen stack check elimination did not detect the call as the loop header block itself was not considered.

function f(o) {
  while(true) {
    o.a();
  }
}

R=fschneider@chromium.org

BUG=none
TEST=none

Committed: http://code.google.com/p/v8/source/detail?r=8329

[fschneider, 2011-06-20 12:18:59]

LGTM with the error fixed.

http://codereview.chromium.org/7210010/diff/1/src/hydrogen.cc
File src/hydrogen.cc (right):

http://codereview.chromium.org/7210010/diff/1/src/hydrogen.cc#newcode1255
src/hydrogen.cc:1255: while (instr != NULL && !back_edge_dominated_by_call) {
Should be 

while (instr != NULL) {

[Søren Thygesen Gjesse, 2011-06-20 12:27:48]

http://codereview.chromium.org/7210010/diff/1/src/hydrogen.cc
File src/hydrogen.cc (right):

http://codereview.chromium.org/7210010/diff/1/src/hydrogen.cc#newcode1255
src/hydrogen.cc:1255: while (instr != NULL && !back_edge_dominated_by_call) {
On 2011/06/20 12:18:59, fschneider wrote:
> Should be 
> 
> while (instr != NULL) {

Sorry about that - fixed.