[Bug target/47831] avoid if-conversion if the conditional instructions and following conditional branch has the same condition

[ramana at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47831

Ramana Radhakrishnan ramana at gcc dot gnu.org changed:

   What|Removed |Added

 CC||ramana at gcc dot gnu.org

--- Comment #3 from Ramana Radhakrishnan ramana at gcc dot gnu.org 2011-08-10 
22:20:42 UTC ---
trunk appears to generate : 


ras_validate:
@ args = 0, pretend = 0, frame = 8
@ frame_needed = 0, uses_anonymous_args = 0
push{r0, r1, r2, r4, r5, lr}
movsr2, #4
add r1, sp, #4
mov r5, r0
bl  foo
cmp r0, #0
blt .L5
subsr4, r0, #1
b   .L3
.L4:
add r3, sp, #4
mov r0, r5
ldrbr1, [r3, r4]@ zero_extendqisi2
bl  bar
addsr2, r0, #1
beq .L2
subsr4, r4, #1
.L3:
addsr3, r4, #1
bne .L4
movsr0, #0
b   .L2
.L5:
mov r0, #-1
.L2:
pop {r1, r2, r3, r4, r5, pc}

[Bug target/47831] avoid if-conversion if the conditional instructions and following conditional branch has the same condition

[steven at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47831

--- Comment #2 from Steven Bosscher steven at gcc dot gnu.org 2011-03-05 
15:19:41 UTC ---
Got RTL before and after the 2nd if-conversion pass, anyone?