git: a8291db89851 - stable/13 - Apply llvm fix for "Invalid PPC CTR loop!" error on powerpcspe

The branch stable/13 has been updated by dim:

URL: https://cgit.FreeBSD.org/src/commit/?id=a8291db89851130a3efa83ea836e57372ffff7ea

commit a8291db89851130a3efa83ea836e57372ffff7ea
Author:     Dimitry Andric <dim@FreeBSD.org>
AuthorDate: 2022-05-18 09:02:03 +0000
Commit:     Dimitry Andric <dim@FreeBSD.org>
CommitDate: 2022-06-04 12:00:13 +0000

    Apply llvm fix for "Invalid PPC CTR loop!" error on powerpcspe
    
    Merge commit d9d15af7873f from llvm git (Qiu Chaofan):
    
      [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
    
    MFC after:      2 weeks
    
    (cherry picked from commit 1a0329799c6d8bfb7eca89d0c8736736b8ab446c)
---
 ...t-d9d15af7873fe16d7a0dde4def30f40fa9901777.diff | 34 ++++++++++++++++++++++
 .../lib/Target/PowerPC/PPCTargetTransformInfo.cpp  |  4 +--
 2 files changed, 35 insertions(+), 3 deletions(-)

diff --git a/commit-d9d15af7873fe16d7a0dde4def30f40fa9901777.diff b/commit-d9d15af7873fe16d7a0dde4def30f40fa9901777.diff
new file mode 100644
index 000000000000..901213b03e93
--- /dev/null
+++ b/commit-d9d15af7873fe16d7a0dde4def30f40fa9901777.diff
@@ -0,0 +1,34 @@
+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;
diff --git a/contrib/llvm-project/llvm/lib/Target/PowerPC/PPCTargetTransformInfo.cpp b/contrib/llvm-project/llvm/lib/Target/PowerPC/PPCTargetTransformInfo.cpp
index cc5738a5d7b6..48be7e0860df 100644
--- a/contrib/llvm-project/llvm/lib/Target/PowerPC/PPCTargetTransformInfo.cpp
+++ b/contrib/llvm-project/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;