[Bug 103142] R600g+sb: optimizer apparently stuck in an endless loop

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changed bug 103142
What Removed Added
Attachment #134738 is obsolete   1

Comment # 1 on bug 103142 from
Created attachment 134759 [details]
Shader triggering the endless loop

I think the last log was not correct, i.e. it was not the right shader. This
new log shows different error messages. The the endless loop is happening in
"post_scheduler". 

I've run the code with R600_DEBUG=nocw,sbdump in addition to the PSC_DUMP. 
I've also tried R600_DEBUG=sbsafemath, but to no avail.

Snip of the log: 

# REGMAP :
    current_AR: R42.x.199||@R1.x
  current_AR is R42.x.199||@R1.x  trying to use R41.x.235||@R0.z
  current_AR is R42.x.199||@R1.x  trying to use R42.x.200@R10.w
  current_AR is R42.x.199||@R1.x  trying to use R44.x.77@R7.z
!!!!!! interf slot: 2  : ADD     t116||@R2.z,   
A100.y[R41.x.235||@R0.z]_763F@R8.y, A100.y[R43.x.126@R2.z]_764F@R8.y
                                            rels:
A100.y[R41.x.235||@R0.z]_763F@R8.y :  <= R100.y.1F, R101.y.1F, R102.y.1F,
R103.y.1F, R104.y.1F, R105.y.1F, R106.y.1F, R107.y.1F, R108.y.1F, R109.y.1F
                                            rels:
A100.y[R43.x.126@R2.z]_764F@R8.y :  <= R100.y.1F, R101.y.1F, R102.y.1F,
R103.y.1F, R104.y.1F, R105.y.1F, R106.y.1F, R107.y.1F, R108.y.1F, R109.y.1F
!!!!!! interf slot: 3  : MOV     R43.z.49||@R10.w,   
A100.y[R42.x.200@R10.w]_759F@R8.y
                                            rels:
A100.y[R42.x.200@R10.w]_759F@R8.y :  <= R100.y.1F, R101.y.1F, R102.y.1F,
R103.y.1F, R104.y.1F, R105.y.1F, R106.y.1F, R107.y.1F, R108.y.1F, R109.y.1F
!!!!!! interf slot: 4  : MOV     R43.y.48||@R12.z,   
A100.x[R44.x.77@R7.z]_755F@R8.x
                                            rels:
A100.x[R44.x.77@R7.z]_755F@R8.x :  <= R100.x.1F, R101.x.1F, R102.x.1F,
R103.x.1F, R104.x.1F, R105.x.1F, R106.x.1F, R107.x.1F, R108.x.1F, R109.x.1F
ci: discarding slots 28
discard_slots : packed_ops : 0
discarding slot 2 : ADD     t116||@R2.z,    A100.y[R41.x.235||@R0.z]_763F@R8.y,
A100.y[R43.x.126@R2.z]_764F@R8.y
                                            rels:
A100.y[R41.x.235||@R0.z]_763F@R8.y :  <= R100.y.1F, R101.y.1F, R102.y.1F,
R103.y.1F, R104.y.1F, R105.y.1F, R106.y.1F, R107.y.1F, R108.y.1F, R109.y.1F
                                            rels:
A100.y[R43.x.126@R2.z]_764F@R8.y :  <= R100.y.1F, R101.y.1F, R102.y.1F,
R103.y.1F, R104.y.1F, R105.y.1F, R106.y.1F, R107.y.1F, R108.y.1F, R109.y.1F
discarding slot 3 : MOV     R43.z.49||@R10.w,   
A100.y[R42.x.200@R10.w]_759F@R8.y
                                            rels:
A100.y[R42.x.200@R10.w]_759F@R8.y :  <= R100.y.1F, R101.y.1F, R102.y.1F,
R103.y.1F, R104.y.1F, R105.y.1F, R106.y.1F, R107.y.1F, R108.y.1F, R109.y.1F
discarding slot 4 : MOV     R43.y.48||@R12.z,   
A100.x[R44.x.77@R7.z]_755F@R8.x
                                            rels:
A100.x[R44.x.77@R7.z]_755F@R8.x :  <= R100.x.1F, R101.x.1F, R102.x.1F,
R103.x.1F, R104.x.1F, R105.x.1F, R106.x.1F, R107.x.1F, R108.x.1F, R109.x.1F
check_interferences: after: 
# REGMAP :
    current_AR: R42.x.199||@R1.x
update_local_interferences : [R26.x.7F R26.y.7F R26.z.7F R27.x.7F R27.y.7F
R27.z.7F R28.x.7F R28.y.7F R28.z.7F R100.x.1F R101.x.1F R100.y.1F R101.y.1F
R102.x.1F R102.y.1F R103.x.1F R104.x.1F R103.y.1F R104.y.1F R105.x.1F R105.y.1F
R106.x.1F R107.x.1F R106.y.1F R107.y.1F R108.x.1F R108.y.1F R109.x.1F R109.y.1F
R4.x.410||@R6.w R41.x.194||@R4.y R42.x.184||@R2.y R43.x.112||@R12.y
R43.y.43||@R14.w R41.x.202||@R0.w R42.x.188||@R1.z R43.x.114||@R13.w
R43.y.44||@R7.w R4.x.423||@R5.w R41.x.213||@R2.w R42.x.195||@R3.y
R43.x.119||@R17.w R43.y.48||@R12.z R43.z.48||@R10.w R41.x.221||@R0.y
R42.x.199||@R1.x R44.x.78||@R3.x R43.z.49||@R10.w R4.x.436||@R4.w
R40.x.206||@R1.y R41.x.231||@R1.w R42.x.206||@R16.z R42.y.71||@R10.z
R42.z.71||@R8.w R40.x.214||@R0.x R41.x.235||@R0.z R42.x.208||@R9.z
R42.y.72||@R3.z R42.z.72||@R8.w t111||@R8.z t112||@R13.z t113||@R7.z
t114||@R3.x t115||@R3.w t116||@R2.z ]
p_a_g: MOV     R42.x.206||@R16.z,    A100.x[R41.x.231||@R1.w]_760F@R8.x
                                            rels:
A100.x[R41.x.231||@R1.w]_760F@R8.x :  <= R100.x.1F, R101.x.1F, R102.x.1F,
R103.x.1F, R104.x.1F, R105.x.1F, R106.x.1F, R107.x.1F, R108.x.1F, R109.x.1F
slot: 2
current group:
slot 2 : MOV     R42.x.206||@R16.z,    A100.x[R41.x.231||@R1.w]_760F@R8.x
                                            rels:
A100.x[R41.x.231||@R1.w]_760F@R8.x :  <= R100.x.1F, R101.x.1F, R102.x.1F,
R103.x.1F, R104.x.1F, R105.x.1F, R106.x.1F, R107.x.1F, R108.x.1F, R109.x.1F
p_a_g: MOV     R43.z.48||@R10.w,    A100.x[R42.x.196@R11.z]_756F@R8.x
                                            rels:
A100.x[R42.x.196@R11.z]_756F@R8.x :  <= R100.x.1F, R101.x.1F, R102.x.1F,
R103.x.1F, R104.x.1F, R105.x.1F, R106.x.1F, R107.x.1F, R108.x.1F, R109.x.1F
slot: 3
current group:
slot 2 : MOV     R42.x.206||@R16.z,    A100.x[R41.x.231||@R1.w]_760F@R8.x
                                            rels:
A100.x[R41.x.231||@R1.w]_760F@R8.x :  <= R100.x.1F, R101.x.1F, R102.x.1F,
R103.x.1F, R104.x.1F, R105.x.1F, R106.x.1F, R107.x.1F, R108.x.1F, R109.x.1F
slot 3 : MOV     R43.z.48||@R10.w,    A100.x[R42.x.196@R11.z]_756F@R8.x
                                            rels:
A100.x[R42.x.196@R11.z]_756F@R8.x :  <= R100.x.1F, R101.x.1F, R102.x.1F,
R103.x.1F, R104.x.1F, R105.x.1F, R106.x.1F, R107.x.1F, R108.x.1F, R109.x.1F
p_a_g: MOV     R42.z.72||@R8.w,    A100.y[R41.x.236@R8.w]_765F@R8.y
                                            rels:
A100.y[R41.x.236@R8.w]_765F@R8.y :  <= R100.y.1F, R101.y.1F, R102.y.1F,
R103.y.1F, R104.y.1F, R105.y.1F, R106.y.1F, R107.y.1F, R108.y.1F, R109.y.1F
slot: 4
current group:
slot 2 : MOV     R42.x.206||@R16.z,    A100.x[R41.x.231||@R1.w]_760F@R8.x
                                            rels:
A100.x[R41.x.231||@R1.w]_760F@R8.x :  <= R100.x.1F, R101.x.1F, R102.x.1F,
R103.x.1F, R104.x.1F, R105.x.1F, R106.x.1F, R107.x.1F, R108.x.1F, R109.x.1F
slot 3 : MOV     R43.z.48||@R10.w,    A100.x[R42.x.196@R11.z]_756F@R8.x
                                            rels:
A100.x[R42.x.196@R11.z]_756F@R8.x :  <= R100.x.1F, R101.x.1F, R102.x.1F,
R103.x.1F, R104.x.1F, R105.x.1F, R106.x.1F, R107.x.1F, R108.x.1F, R109.x.1F
slot 4 : MOV     R42.z.72||@R8.w,    A100.y[R41.x.236@R8.w]_765F@R8.y
                                            rels:
A100.y[R41.x.236@R8.w]_765F@R8.y :  <= R100.y.1F, R101.y.1F, R102.y.1F,
R103.y.1F, R104.y.1F, R105.y.1F, R106.y.1F, R107.y.1F, R108.y.1F, R109.y.1F
p_a_g: ADD     t112||@R13.z,    A100.y[R42.x.188||@R1.z]_749F@R8.y,
A100.y[R44.x.73@R2.x]_750F@R8.y
                                            rels:
A100.y[R42.x.188||@R1.z]_749F@R8.y :  <= R100.y.1F, R101.y.1F, R102.y.1F,
R103.y.1F, R104.y.1F, R105.y.1F, R106.y.1F, R107.y.1F, R108.y.1F, R109.y.1F
                                            rels:
A100.y[R44.x.73@R2.x]_750F@R8.y :  <= R100.y.1F, R101.y.1F, R102.y.1F,
R103.y.1F, R104.y.1F, R105.y.1F, R106.y.1F, R107.y.1F, R108.y.1F, R109.y.1F
   no suitable slots
p_a_g: ADD     t115||@R3.w,    A100.x[R41.x.231||@R1.w]_760F@R8.x,
A100.x[R43.x.125@R3.w]_761F@R8.x
                                            rels:
A100.x[R41.x.231||@R1.w]_760F@R8.x :  <= R100.x.1F, R101.x.1F, R102.x.1F,
R103.x.1F, R104.x.1F, R105.x.1F, R106.x.1F, R107.x.1F, R108.x.1F, R109.x.1F
                                            rels:
A100.x[R43.x.125@R3.w]_761F@R8.x :  <= R100.x.1F, R101.x.1F, R102.x.1F,
R103.x.1F, R104.x.1F, R105.x.1F, R106.x.1F, R107.x.1F, R108.x.1F, R109.x.1F
   no suitable slots
p_a_g: MOV     R43.x.114||@R13.w,    A100.y[R42.x.188||@R1.z]_749F@R8.y
                                            rels:
A100.y[R42.x.188||@R1.z]_749F@R8.y :  <= R100.y.1F, R101.y.1F, R102.y.1F,
R103.y.1F, R104.y.1F, R105.y.1F, R106.y.1F, R107.y.1F, R108.y.1F, R109.y.1F
   no suitable slots
p_a_g: ADD     t113||@R7.z,    A100.x[R42.x.195||@R3.y]_754F@R8.x,
A100.x[R44.x.77@R7.z]_755F@R8.x
                                            rels:
A100.x[R42.x.195||@R3.y]_754F@R8.x :  <= R100.x.1F, R101.x.1F, R102.x.1F,
R103.x.1F, R104.x.1F, R105.x.1F, R106.x.1F, R107.x.1F, R108.x.1F, R109.x.1F
                                            rels:
A100.x[R44.x.77@R7.z]_755F@R8.x :  <= R100.x.1F, R101.x.1F, R102.x.1F,
R103.x.1F, R104.x.1F, R105.x.1F, R106.x.1F, R107.x.1F, R108.x.1F, R109.x.1F
   no suitable slots
p_a_g: MOV     R42.z.71||@R8.w,    A100.x[R41.x.232@R15.w]_762F@R8.x
                                            rels:
A100.x[R41.x.232@R15.w]_762F@R8.x :  <= R100.x.1F, R101.x.1F, R102.x.1F,
R103.x.1F, R104.x.1F, R105.x.1F, R106.x.1F, R107.x.1F, R108.x.1F, R109.x.1F
   no suitable slots
p_a_g: MOV     R42.y.72||@R3.z,    A100.y[R43.x.126@R2.z]_764F@R8.y
                                            rels:
A100.y[R43.x.126@R2.z]_764F@R8.y :  <= R100.y.1F, R101.y.1F, R102.y.1F,
R103.y.1F, R104.y.1F, R105.y.1F, R106.y.1F, R107.y.1F, R108.y.1F, R109.y.1F
   no suitable slots
p_a_g: ADD     t111||@R8.z,    A100.x[R42.x.184||@R2.y]_744F@R8.x,
A100.x[R44.x.72@R8.z]_745F@R8.x
                                            rels:
A100.x[R42.x.184||@R2.y]_744F@R8.x :  <= R100.x.1F, R101.x.1F, R102.x.1F,
R103.x.1F, R104.x.1F, R105.x.1F, R106.x.1F, R107.x.1F, R108.x.1F, R109.x.1F
                                            rels:
A100.x[R44.x.72@R8.z]_745F@R8.x :  <= R100.x.1F, R101.x.1F, R102.x.1F,
R103.x.1F, R104.x.1F, R105.x.1F, R106.x.1F, R107.x.1F, R108.x.1F, R109.x.1F
   no suitable slots
p_a_g: MOV     R43.y.43||@R14.w,    A100.x[R44.x.72@R8.z]_745F@R8.x
                                            rels:
A100.x[R44.x.72@R8.z]_745F@R8.x :  <= R100.x.1F, R101.x.1F, R102.x.1F,
R103.x.1F, R104.x.1F, R105.x.1F, R106.x.1F, R107.x.1F, R108.x.1F, R109.x.1F
   no suitable slots
p_a_g: MOV     R42.x.208||@R9.z,    A100.y[R41.x.235||@R0.z]_763F@R8.y
                                            rels:
A100.y[R41.x.235||@R0.z]_763F@R8.y :  <= R100.y.1F, R101.y.1F, R102.y.1F,
R103.y.1F, R104.y.1F, R105.y.1F, R106.y.1F, R107.y.1F, R108.y.1F, R109.y.1F
   no suitable slots


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