Remove accidentally committed diff file

I accidentally added the upstream diff file from the llvm commit I
merged in 1a0329799c. Clean it out.

Noticed by:	markj
Fixes:		1a0329799c
MFC after:	2 weeks

commit-d9d15af7873fe16d7a0dde4def30f40fa9901777.diff

@@ -1,34 +0,0 @@
-commit d9d15af7873fe16d7a0dde4def30f40fa9901777
-Author: Qiu Chaofan <qiucofan@cn.ibm.com>
-Date:   Wed May 18 15:55:02 2022 +0800
-
-    [PowerPC] Treat llvm.fmuladd intrinsic as using CTR
-    
-    This fixes bug 55463, similar to D78668. This is a temporary fix since
-    we will switch to post-isel CTR loop determination in the future.
-    
-    Reviewed By: dim, shchenz
-    
-    Differential Revision: https://reviews.llvm.org/D125746
-
-diff --git a/llvm/lib/Target/PowerPC/PPCTargetTransformInfo.cpp b/llvm/lib/Target/PowerPC/PPCTargetTransformInfo.cpp
-index 501cfa07efeb..7b956fd3478e 100644
---- a/llvm/lib/Target/PowerPC/PPCTargetTransformInfo.cpp
-+++ b/llvm/lib/Target/PowerPC/PPCTargetTransformInfo.cpp
-@@ -491,15 +491,13 @@ bool PPCTTIImpl::mightUseCTR(BasicBlock *BB, TargetLibraryInfo *LibInfo,
-           case Intrinsic::experimental_constrained_sin:
-           case Intrinsic::experimental_constrained_cos:
-             return true;
--          // There is no corresponding FMA instruction for PPC double double.
--          // Thus, we need to disable CTR loop generation for this type.
--          case Intrinsic::fmuladd:
-           case Intrinsic::copysign:
-             if (CI->getArgOperand(0)->getType()->getScalarType()->
-                 isPPC_FP128Ty())
-               return true;
-             else
-               continue; // ISD::FCOPYSIGN is never a library call.
-+          case Intrinsic::fmuladd:
-           case Intrinsic::fma:                Opcode = ISD::FMA;        break;
-           case Intrinsic::sqrt:               Opcode = ISD::FSQRT;      break;
-           case Intrinsic::floor:              Opcode = ISD::FFLOOR;     break;