[llvm] AMDGPU: Simplify FP8 conversion definitions. NFC. (PR #83043)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-backend-amdgpu

Author: Changpeng Fang (changpeng)

<details>
<summary>Changes</summary>

  Reals should inherit predicates from the corresponding Pseudo.

---
Full diff: https://github.com/llvm/llvm-project/pull/83043.diff


3 Files Affected:

- (modified) llvm/lib/Target/AMDGPU/VOP1Instructions.td (+2-4) 
- (modified) llvm/lib/Target/AMDGPU/VOP3Instructions.td (-2) 
- (modified) llvm/lib/Target/AMDGPU/VOPInstructions.td (+1) 


``````````diff
diff --git a/llvm/lib/Target/AMDGPU/VOP1Instructions.td b/llvm/lib/Target/AMDGPU/VOP1Instructions.td
index f5424cf48d7a53..dbb1977183d190 100644
--- a/llvm/lib/Target/AMDGPU/VOP1Instructions.td
+++ b/llvm/lib/Target/AMDGPU/VOP1Instructions.td
@@ -636,8 +636,8 @@ def VOPProfile_Base_CVT_F32_F8_OpSel : VOPProfile<[f32, i32, untyped, untyped]>
   let Src1VOP3DPP = Src1RC64;
 }
 
-let SubtargetPredicate = isGFX12Plus, mayRaiseFPException = 0,
-    SchedRW = [WriteFloatCvt] in {
+let SubtargetPredicate = isGFX12Plus, OtherPredicates = [HasFP8ConversionInsts],
+    mayRaiseFPException = 0, SchedRW = [WriteFloatCvt] in {
   defm V_CVT_F32_FP8_OP_SEL    : VOP1Inst<"v_cvt_f32_fp8_op_sel", VOPProfile_Base_CVT_F32_F8_OpSel>;
   defm V_CVT_F32_BF8_OP_SEL    : VOP1Inst<"v_cvt_f32_bf8_op_sel", VOPProfile_Base_CVT_F32_F8_OpSel>;
   defm V_CVT_PK_F32_FP8_OP_SEL : VOP1Inst<"v_cvt_pk_f32_fp8_op_sel", VOPProfile_Base_CVT_PK_F32_F8_OpSel>;
@@ -1422,12 +1422,10 @@ defm V_SCREEN_PARTITION_4SE_B32 : VOP1_Real_gfx9 <0x37>;
 let AssemblerPredicate = isGFX940Plus in
 defm V_MOV_B64 : VOP1_Real_gfx9 <0x38>;
 
-let OtherPredicates = [HasFP8ConversionInsts] in {
 defm V_CVT_F32_FP8       : VOP1_Real_NoDstSel_SDWA_gfx9<0x54>;
 defm V_CVT_F32_BF8       : VOP1_Real_NoDstSel_SDWA_gfx9<0x55>;
 defm V_CVT_PK_F32_FP8    : VOP1_Real_NoDstSel_SDWA_gfx9<0x56>;
 defm V_CVT_PK_F32_BF8    : VOP1_Real_NoDstSel_SDWA_gfx9<0x57>;
-}
 
 //===----------------------------------------------------------------------===//
 // GFX10
diff --git a/llvm/lib/Target/AMDGPU/VOP3Instructions.td b/llvm/lib/Target/AMDGPU/VOP3Instructions.td
index 7198a4022dae87..334cfad478f151 100644
--- a/llvm/lib/Target/AMDGPU/VOP3Instructions.td
+++ b/llvm/lib/Target/AMDGPU/VOP3Instructions.td
@@ -1647,9 +1647,7 @@ defm V_CVT_PKNORM_U16_F16 : VOP3OpSel_Real_gfx9 <0x29a>;
 
 defm V_LSHL_ADD_U64 : VOP3_Real_vi <0x208>;
 
-let OtherPredicates = [HasFP8ConversionInsts] in {
 defm V_CVT_PK_FP8_F32 : VOP3OpSel_Real_gfx9 <0x2a2>;
 defm V_CVT_PK_BF8_F32 : VOP3OpSel_Real_gfx9 <0x2a3>;
 defm V_CVT_SR_FP8_F32 : VOP3OpSel_Real_gfx9_forced_opsel2 <0x2a4>;
 defm V_CVT_SR_BF8_F32 : VOP3OpSel_Real_gfx9_forced_opsel2 <0x2a5>;
-}
diff --git a/llvm/lib/Target/AMDGPU/VOPInstructions.td b/llvm/lib/Target/AMDGPU/VOPInstructions.td
index 80d7d96a5e3cc8..918bdb9506b04d 100644
--- a/llvm/lib/Target/AMDGPU/VOPInstructions.td
+++ b/llvm/lib/Target/AMDGPU/VOPInstructions.td
@@ -670,6 +670,7 @@ class Base_VOP_SDWA9_Real <VOP_SDWA_Pseudo ps> :
 
   let SubtargetPredicate = HasSDWA9;
   let AssemblerPredicate = HasSDWA9;
+  let OtherPredicates    = ps.OtherPredicates;
   let AsmVariantName = !if(ps.Pfl.HasExtSDWA9, AMDGPUAsmVariants.SDWA9,
                                                AMDGPUAsmVariants.Disable);
   let DecoderNamespace = "GFX9";

``````````

</details>


https://github.com/llvm/llvm-project/pull/83043