Mercurial > hg > CbC > CbC_gcc
diff gcc/web.c @ 67:f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
author | nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> |
---|---|
date | Tue, 22 Mar 2011 17:18:12 +0900 |
parents | b7f97abdc517 |
children | 04ced10e8804 |
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--- a/gcc/web.c Tue May 25 18:58:51 2010 +0900 +++ b/gcc/web.c Tue Mar 22 17:18:12 2011 +0900 @@ -38,7 +38,7 @@ #include "system.h" #include "coretypes.h" #include "tm.h" -#include "toplev.h" +#include "diagnostic-core.h" #include "rtl.h" #include "hard-reg-set.h" @@ -377,7 +377,17 @@ FOR_BB_INSNS (bb, insn) { unsigned int uid = INSN_UID (insn); - if (NONDEBUG_INSN_P (insn)) + + if (NONDEBUG_INSN_P (insn) + /* Ignore naked clobber. For example, reg 134 in the second insn + of the following sequence will not be replaced. + + (insn (clobber (reg:SI 134))) + + (insn (set (reg:SI 0 r0) (reg:SI 134))) + + Thus the later passes can optimize them away. */ + && GET_CODE (PATTERN (insn)) != CLOBBER) { df_ref *use_rec; df_ref *def_rec;