[Bug tree-optimization/23855] Should not do loop header copying for inner loop
pinskia at gcc dot gnu dot org
gcc-bugzilla@gcc.gnu.org
Tue Sep 13 14:01:00 GMT 2005
------- Additional Comments From pinskia at gcc dot gnu dot org 2005-09-13 14:01 -------
On PPC, we get optimal and almost unswitched loop:
L4:
ble- cr4,L7
li r31,0
L6:
addi r31,r31,1
bl _bar
cmpw cr7,r30,r31
bne+ cr7,L6
L7:
addi r29,r29,1
cmpw cr7,r28,r29
bne+ cr7,L4
cr4 is a callee save register.
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23855
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