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| author | H.J. Lu <hongjiu.lu@intel.com> | 2004-09-04 00:11:10 +0000 |
|---|---|---|
| committer | H.J. Lu <hjl@gcc.gnu.org> | 2004-09-03 17:11:10 -0700 |
| commit | d20bf446f61bf73a0f8a12838ddc8f92d6a87fce (patch) | |
| tree | a2a21a964bcda58ffdaca360c7274075b3733fd7 | |
| parent | 1f6d3a0807da9185a1e160cfbeca42e42d97ac80 (diff) | |
| download | gcc-d20bf446f61bf73a0f8a12838ddc8f92d6a87fce.zip gcc-d20bf446f61bf73a0f8a12838ddc8f92d6a87fce.tar.gz gcc-d20bf446f61bf73a0f8a12838ddc8f92d6a87fce.tar.bz2 | |
i386.c (x86_branch_hints): Remove m_PENT4 and m_NOCONA.
2004-09-03 H.J. Lu <hongjiu.lu@intel.com>
* config/i386/i386.c (x86_branch_hints): Remove m_PENT4 and
m_NOCONA.
From-SVN: r87065
| -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 7b54170..02b8289 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 f50b81b..760c7f0 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; |