AMDGPU: Ignore CodeObjectV3 when inlining

[arsenm]

Summary

This was inhibiting inlining of library functions when clang was
invoking the inliner directly. This is covering a bit of a mess with
subtarget feature handling, and this shouldn't be a subtarget
feature. The behavior is different depending on whether you are using
a -mattr flag in clang, or llc, opt.

[rampitec]

LGTM

[arsenm]

r353899

lib/Target/AMDGPU/AMDGPUTargetTransformInfo.h

const FeatureBitset InlineFeatureIgnoreList = {
     AMDGPU::FeatureAutoWaitcntBeforeBarrier,
     AMDGPU::FeatureDebuggerEmitPrologue,
     AMDGPU::FeatureDebuggerInsertNops,
 
     // Property of the kernel/environment which can't actually differ.
     AMDGPU::FeatureSGPRInitBug,
     AMDGPU::FeatureXNACK,
     AMDGPU::FeatureTrapHandler,
+    AMDGPU::FeatureCodeObjectV3,
 
     // Perf-tuning features
     AMDGPU::FeatureFastFMAF32,
     AMDGPU::HalfRate64Ops
   };
 
   const GCNSubtarget *getST() const { return ST; }
   const AMDGPUTargetLowering *getTLI() const { return TLI; }

test/Transforms/Inline/AMDGPU/inline-target-cpu.ll

 
 ; CHECK-LABEL: @call_func_without_loadstoreopt(
 ; CHECK-NEXT: ret i32 0
 define i32 @call_func_without_loadstoreopt() #9 {
   %call = call i32 @func_no_loadstoreopt()
   ret i32 %call
 }
 
+define i32 @enable_codeobjectv3() #10 {
+  ret i32 999
+}
+
+; CHECK-LABEL: @disable_codeobjectv3_call_codeobjectv3(
+; CHECK-NEXT: ret i32 999
+define i32 @disable_codeobjectv3_call_codeobjectv3() #11 {
+  %call = call i32 @enable_codeobjectv3()
+  ret i32 %call
+}
+
 attributes #0 = { nounwind }
 attributes #1 = { nounwind "target-cpu"="fiji" }
 attributes #2 = { nounwind "target-cpu"="fiji" "target-features"="+fp32-denormals" }
 attributes #3 = { nounwind "target-features"="+fp32-denormals" }
 attributes #4 = { nounwind "target-features"="-fp32-denormals" }
 attributes #5 = { nounwind "target-cpu"="gfx900" }
 attributes #6 = { nounwind "target-features"="-half-rate-64-ops" }
 attributes #7 = { nounwind "target-features"="+half-rate-64-ops" }
 attributes #8 = { nounwind "target-features"="-load-store-opt" }
 attributes #9 = { nounwind "target-features"="+load-store-opt" }
+attributes #10 = { nounwind "target-features"="+code-object-v3" }
+attributes #11 = { nounwind "target-features"="-code-object-v3" }