[gcc] Replace rsp/rbp lea base with esp/ebp This is yet another fix for POINTERS_EXTEND_UNSIGNED > 0 problem of keeping high part of rsp/rbp. In addition, minor fix for previous change - do not assert if writing rsp/rbp into memory (probably spill)? Test (-O1) must return 0 but returns high part of rsp without the fix: struct StringRef { const char *Data; unsigned Length; }; // Prevent inlining with 'weak' attribute int print_size(struct StringRef Data) __attribute__((weak)); int print_size(struct StringRef Data) { return Data.Length; } int main() { char str[6]; // NEEDED! struct StringRef s; s.Data = str + 3; // NEEDED! s.Length = 0; return print_size(s); } BUG=http://code.google.com/p/nativeclient/issues/detail?id=1304 TEST=see above Review URL: http://codereview.chromium.org/6271009 3 files changed
