| Bug ID | 101442 |
|---|---|
| Summary | Piglit shaders@ssa@fs-if-def-else-break fails with sb but passes with R600_DEBUG=nosb |
| Product | Mesa |
| Version | git |
| Hardware | Other |
| OS | All |
| Status | NEW |
| Severity | normal |
| Priority | medium |
| Component | Drivers/Gallium/r600 |
| Assignee | dri-devel@lists.freedesktop.org |
| Reporter | gw.fossdev@gmail.com |
| QA Contact | dri-devel@lists.freedesktop.org |
The piglit test shaders@ssa@fs-if-def-else-break fails with only with sb enabled but passes without it. The relevant parts of the failing shader before and after optimization look like this: ===== SHADER #12 ====================================== PS/BARTS/EVERGREEN ===== ===== 90 dw ===== 9 gprs ===== 2 stack ================================== [...] 0060 801f00fe 0100229c 6 MP x: PRED_SETNE_INT R8.x, PV.x, 0 0018 0000000b 82800000 JUMP @22 0020 0000001f a00c0000 ALU 4 @62 0062 000000f8 00200c90 7 x: MOV R1.x, 0 <---- 0064 000004f9 20200c90 y: MOV R1.y, 1.0 <---- 0066 000000f8 40200c90 z: MOV R1.z, 0 0068 800004f9 60200c90 w: MOV R1.w, 1.0 0022 0000000d 83400001 ELSE @26 POP:1 0024 00000023 a80c0000 ALU_POP_AFTER 4 @70 0070 000004f9 00200c90 8 x: MOV R1.x, 1.0 <---- 0072 000000f8 20200c90 y: MOV R1.y, 0 <---- 0074 000000f8 40200c90 z: MOV R1.z, 0 0076 800004f9 60200c90 w: MOV R1.w, 1.0 0026 40000027 a4040000 ALU_PUSH_BEFORE 2 @78 KC0[CB0:0-15] 0078 80000081 00801990 9 x: NOT_INT R4.x, KC0[1].x 0080 801f00fe 0100229c 10 MP x: PRED_SETNE_INT R8.x, PV.x, 0 0028 00000011 82800001 JUMP @34 POP:1 0030 00000011 82400000 LOOP_BREAK @34 0032 00000011 83800001 POP @34 POP:1 0034 00000002 81400000 LOOP_END @4 0036 00000029 a00c0000 ALU 4 @82 0082 00000001 00000c90 11 x: MOV R0.x, R1.x 0084 00000401 20000c90 y: MOV R0.y, R1.y 0086 00000801 40000c90 z: MOV R0.z, R1.z 0088 80000c01 60000c90 w: MOV R0.w, R1.w 0038 c0000000 95200688 EXPORT_DONE PIXEL 0 R0.xyzw EOP ===== SHADER_END =============================================================== ===== SHADER #12 OPT ================================== PS/BARTS/EVERGREEN ===== ===== 50 dw ===== 1 gprs ===== 2 stack ========================================= [...] 0040 801f0800 00002284 3 M x: PRED_SETNE_INT __.x, R0.z, 0 0018 0000000d 82800001 JUMP @26 POP:1 0020 00000015 a0040000 ALU 2 @42 0042 000000f9 00000c90 4 x: MOV R0.x, 1.0 <----- 0044 800000f8 20000c90 y: MOV R0.y, 0 <----- 0022 0000000e 82400000 LOOP_BREAK @28 0024 0000000d 83800001 POP @26 POP:1 0026 00000017 a0040000 ALU 2 @46 0046 000000f9 00000c90 5 x: MOV R0.x, 1.0 <----- 0048 800000f8 20000c90 y: MOV R0.y, 0 <----- 0028 00000002 81400000 LOOP_END @4 0030 c0000000 95200a44 EXPORT_DONE PIXEL 0 R0.0xy1 EOP ===== SHADER_END =============================================================== In short after the optimization R0.xy get the same values assigned in both decision paths. Best, Gert
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