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| author | Evan Cheng <evan.cheng@apple.com> | 2007-10-26 01:56:11 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2007-10-26 01:56:11 +0000 |
| commit | 27a820abeb2f68de214e469e14a5eca654b9e914 (patch) | |
| tree | 2aa0e737c3f01cc1f447def3d95d9ec7833f99bc /lib/Transforms/Instrumentation/RSProfiling.cpp | |
| parent | ad65456a28606f43bb19e4d8fab1e66ee5603d15 (diff) | |
| download | external_llvm-27a820abeb2f68de214e469e14a5eca654b9e914.zip external_llvm-27a820abeb2f68de214e469e14a5eca654b9e914.tar.gz external_llvm-27a820abeb2f68de214e469e14a5eca654b9e914.tar.bz2 | |
Loosen up iv reuse to allow reuse of the same stride but a larger type when truncating from the larger type to smaller type is free.
e.g.
Turns this loop:
LBB1_1: # entry.bb_crit_edge
xorl %ecx, %ecx
xorw %dx, %dx
movw %dx, %si
LBB1_2: # bb
movl L_X$non_lazy_ptr, %edi
movw %si, (%edi)
movl L_Y$non_lazy_ptr, %edi
movw %dx, (%edi)
addw $4, %dx
incw %si
incl %ecx
cmpl %eax, %ecx
jne LBB1_2 # bb
into
LBB1_1: # entry.bb_crit_edge
xorl %ecx, %ecx
xorw %dx, %dx
LBB1_2: # bb
movl L_X$non_lazy_ptr, %esi
movw %cx, (%esi)
movl L_Y$non_lazy_ptr, %esi
movw %dx, (%esi)
addw $4, %dx
incl %ecx
cmpl %eax, %ecx
jne LBB1_2 # bb
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43375 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Transforms/Instrumentation/RSProfiling.cpp')
0 files changed, 0 insertions, 0 deletions