[llvm] [AMDGPU] Remove s_set_inst_prefetch_distance support from GFX12 (PR #78786)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->
@llvm/pr-subscribers-mc

@llvm/pr-subscribers-backend-amdgpu

Author: Stanislav Mekhanoshin (rampitec)

<details>
<summary>Changes</summary>

This instruction is not supported by GFX12.

---
Full diff: https://github.com/llvm/llvm-project/pull/78786.diff


3 Files Affected:

- (modified) llvm/lib/Target/AMDGPU/SOPInstructions.td (+1-1) 
- (modified) llvm/test/MC/AMDGPU/gfx12_asm_sopp.s (-9) 
- (modified) llvm/test/MC/Disassembler/AMDGPU/gfx12_dasm_sopp.txt (-9) 


``````````diff
diff --git a/llvm/lib/Target/AMDGPU/SOPInstructions.td b/llvm/lib/Target/AMDGPU/SOPInstructions.td
index eae4800ade0dce..2ce5851090ef87 100644
--- a/llvm/lib/Target/AMDGPU/SOPInstructions.td
+++ b/llvm/lib/Target/AMDGPU/SOPInstructions.td
@@ -2618,7 +2618,7 @@ multiclass SOPP_Real_With_Relaxation_gfx11_gfx12<bits<7>op> :
 defm S_SETKILL                    : SOPP_Real_32_gfx11_gfx12<0x001>;
 defm S_SETHALT                    : SOPP_Real_32_gfx11_gfx12<0x002>;
 defm S_SLEEP                      : SOPP_Real_32_gfx11_gfx12<0x003>;
-defm S_SET_INST_PREFETCH_DISTANCE : SOPP_Real_32_Renamed_gfx11_gfx12<0x004, S_INST_PREFETCH, "s_set_inst_prefetch_distance">;
+defm S_SET_INST_PREFETCH_DISTANCE : SOPP_Real_32_Renamed_gfx11<0x004, S_INST_PREFETCH, "s_set_inst_prefetch_distance">;
 defm S_CLAUSE                     : SOPP_Real_32_gfx11_gfx12<0x005>;
 defm S_DELAY_ALU                  : SOPP_Real_32_gfx11_gfx12<0x007>;
 defm S_WAITCNT_DEPCTR             : SOPP_Real_32_gfx11<0x008>;
diff --git a/llvm/test/MC/AMDGPU/gfx12_asm_sopp.s b/llvm/test/MC/AMDGPU/gfx12_asm_sopp.s
index 41ed4de6be8a72..f6c7c99847d664 100644
--- a/llvm/test/MC/AMDGPU/gfx12_asm_sopp.s
+++ b/llvm/test/MC/AMDGPU/gfx12_asm_sopp.s
@@ -69,15 +69,6 @@ s_wait_alu depctr_va_sdst(3)
 s_wait_alu depctr_va_vdst(14) depctr_va_sdst(6) depctr_vm_vsrc(6)
 // GFX12: encoding: [0x9b,0xed,0x88,0xbf]
 
-s_inst_prefetch 0x1234
-// GFX12: s_set_inst_prefetch_distance 0x1234 ; encoding: [0x34,0x12,0x84,0xbf]
-
-s_set_inst_prefetch_distance 0x1234
-// GFX12: s_set_inst_prefetch_distance 0x1234 ; encoding: [0x34,0x12,0x84,0xbf]
-
-s_set_inst_prefetch_distance 0xc1d1
-// GFX12: s_set_inst_prefetch_distance 0xc1d1 ; encoding: [0xd1,0xc1,0x84,0xbf]
-
 s_singleuse_vdst 0x0000
 // GFX12: encoding: [0x00,0x00,0x93,0xbf]
 
diff --git a/llvm/test/MC/Disassembler/AMDGPU/gfx12_dasm_sopp.txt b/llvm/test/MC/Disassembler/AMDGPU/gfx12_dasm_sopp.txt
index 6f4dc2423487e2..ea547fcd5d0ecf 100644
--- a/llvm/test/MC/Disassembler/AMDGPU/gfx12_dasm_sopp.txt
+++ b/llvm/test/MC/Disassembler/AMDGPU/gfx12_dasm_sopp.txt
@@ -264,15 +264,6 @@
 # GFX12: s_sethalt 0xc1d1                        ; encoding: [0xd1,0xc1,0x82,0xbf]
 0xd1,0xc1,0x82,0xbf
 
-# GFX12: s_set_inst_prefetch_distance 0x0        ; encoding: [0x00,0x00,0x84,0xbf]
-0x00,0x00,0x84,0xbf
-
-# GFX12: s_set_inst_prefetch_distance 0x1234     ; encoding: [0x34,0x12,0x84,0xbf]
-0x34,0x12,0x84,0xbf
-
-# GFX12: s_set_inst_prefetch_distance 0xc1d1     ; encoding: [0xd1,0xc1,0x84,0xbf]
-0xd1,0xc1,0x84,0xbf
-
 # GFX12: s_setkill 0                             ; encoding: [0x00,0x00,0x81,0xbf]
 0x00,0x00,0x81,0xbf
 

``````````

</details>


https://github.com/llvm/llvm-project/pull/78786