------- Comment #13 from ubizjak at gmail dot com 2009-02-12 13:59 -------
GCC: (GNU) 4.4.0 20090129 (experimental) [trunk revision 143750]:
foo:
movl 4(%rdi), %eax #, s
.L2:
movl %eax, %ecx # s, s.29
addl (%rsi), %ecx #* d, s.29
addq $4, %rsi #, d
movl %eax, %r8d # s, s.30
cmpl %edx, %ecx # g, s
movl %ecx, %eax # s.29, s
jl .L2 #,
movl %r8d, (%rdi) # s.30,* v
ret
GCC: (GNU) 4.3.4 20090211 (prerelease) [gcc-4_3-branch revision 144096]:
foo:
movl 4(%rdi), %ecx #, s
.L2:
movl %ecx, %eax # s, s.19
addl (%rsi), %eax #* d, s.19
addq $4, %rsi #, d
movl %ecx, %r8d # s, s.20
cmpl %edx, %eax # g, s
movl %eax, %ecx # s.19, s
jl .L2 #,
movl %r8d, (%rdi) # s.20,* v
ret
Fixed for 4.3 and 4.4 branch.
--
ubizjak at gmail dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work|3.4.0 |3.4.0 4.3.4 4.4.0
Summary|[4.2/4.3/4.4 Regression] |[4.2 Regression] jump to
|jump to middle of loop on |middle of loop on entry with
|entry with using old version|using old version of an
|of an variable |variable
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27986
