diff options
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/config/i386/i386.c | 6 |
2 files changed, 10 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 7b541708dff..02b82890f90 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2004-09-03 H.J. Lu <hongjiu.lu@intel.com> + + * config/i386/i386.c (x86_branch_hints): Remove m_PENT4 and + m_NOCONA. + 2004-09-03 Richard Henderson <rth@redhat.com> PR middle-end/9997 diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c index f50b81bf44f..760c7f0d997 100644 --- a/gcc/config/i386/i386.c +++ b/gcc/config/i386/i386.c @@ -527,7 +527,11 @@ const int x86_unroll_strlen = m_486 | m_PENT | m_PPRO | m_ATHLON_K8 | m_K6; const int x86_cmove = m_PPRO | m_ATHLON_K8 | m_PENT4 | m_NOCONA; const int x86_3dnow_a = m_ATHLON_K8; const int x86_deep_branch = m_PPRO | m_K6 | m_ATHLON_K8 | m_PENT4 | m_NOCONA; -const int x86_branch_hints = m_PENT4 | m_NOCONA; +/* Branch hints were put in P4 based on simulation result. But + after P4 was made, no performance benefit was observed with + branch hints. It also increases the code size. As the result, + icc never generates branch hints. */ +const int x86_branch_hints = 0; const int x86_use_sahf = m_PPRO | m_K6 | m_PENT4 | m_NOCONA; const int x86_partial_reg_stall = m_PPRO; const int x86_use_loop = m_K6; |