[llvm] [AMDGPU] Add regbankselect rules for G_ICMP/G_FCMP (PR #172048)

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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp -- llvm/lib/Target/AMDGPU/AMDGPURegBankLegalizeRules.cpp --diff_from_common_commit
``````````

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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/lib/Target/AMDGPU/AMDGPURegBankLegalizeRules.cpp b/llvm/lib/Target/AMDGPU/AMDGPURegBankLegalizeRules.cpp
index 68dbb4727..fe2c21e08 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPURegBankLegalizeRules.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPURegBankLegalizeRules.cpp
@@ -570,12 +570,16 @@ RegBankLegalizeRules::RegBankLegalizeRules(const GCNSubtarget &_ST,
 
   addRulesForGOpcs({G_FCMP})
       // S16: Use scalar on GFX11+, vector otherwise
-      .Any({{UniS1, _, S16}, {{Sgpr32Trunc}, {None, Sgpr16, Sgpr16}}}, ST->hasSALUFloatInsts())
-      .Any({{UniS1, _, S16}, {{UniInVcc}, {None, Vgpr16, Vgpr16}}}, !ST->hasSALUFloatInsts())
+      .Any({{UniS1, _, S16}, {{Sgpr32Trunc}, {None, Sgpr16, Sgpr16}}},
+           ST->hasSALUFloatInsts())
+      .Any({{UniS1, _, S16}, {{UniInVcc}, {None, Vgpr16, Vgpr16}}},
+           !ST->hasSALUFloatInsts())
       .Any({{DivS1, _, S16}, {{Vcc}, {None, Vgpr16, Vgpr16}}})
       // S32 : Use scalar on GFX11+, vector otherwise
-      .Any({{UniS1, _, S32}, {{Sgpr32Trunc}, {None, Sgpr32, Sgpr32}}}, ST->hasSALUFloatInsts())
-      .Any({{UniS1, _, S32}, {{UniInVcc}, {None, Vgpr32, Vgpr32}}}, !ST->hasSALUFloatInsts())
+      .Any({{UniS1, _, S32}, {{Sgpr32Trunc}, {None, Sgpr32, Sgpr32}}},
+           ST->hasSALUFloatInsts())
+      .Any({{UniS1, _, S32}, {{UniInVcc}, {None, Vgpr32, Vgpr32}}},
+           !ST->hasSALUFloatInsts())
       .Any({{DivS1, _, S32}, {{Vcc}, {None, Vgpr32, Vgpr32}}})
       // S64 : No scalar f64 compare exists, always use vector
       .Any({{UniS1, _, S64}, {{UniInVcc}, {None, Vgpr64, Vgpr64}}})

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https://github.com/llvm/llvm-project/pull/172048