[llvm] d0be944 - [X86] Add slow div64 tuning flag to Nehalem target (#91129)

[via llvm-commits]

Author: Simon Pilgrim
Date: 2024-05-06T18:31:36+01:00
New Revision: d0be944aa51194145cd15c987af67489f735059d

URL: https://github.com/llvm/llvm-project/commit/d0be944aa51194145cd15c987af67489f735059d
DIFF: https://github.com/llvm/llvm-project/commit/d0be944aa51194145cd15c987af67489f735059d.diff

LOG: [X86] Add slow div64 tuning flag to Nehalem target (#91129)

This appears to have been missed because later cpus don't inherit from Nehalem tuning much.

Noticed while cleaning up for #90985

Added: 
    

Modified: 
    llvm/lib/Target/X86/X86.td
    llvm/test/CodeGen/X86/bypass-slow-division-64.ll

Removed: 
    


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diff  --git a/llvm/lib/Target/X86/X86.td b/llvm/lib/Target/X86/X86.td
index 78bc043911f2fc..9e731947893de9 100644
--- a/llvm/lib/Target/X86/X86.td
+++ b/llvm/lib/Target/X86/X86.td
@@ -873,6 +873,7 @@ def ProcessorFeatures {
   // Nehalem
   list<SubtargetFeature> NHMFeatures = X86_64V2Features;
   list<SubtargetFeature> NHMTuning = [TuningMacroFusion,
+                                      TuningSlowDivide64,
                                       TuningInsertVZEROUPPER,
                                       TuningNoDomainDelayMov];
 

diff  --git a/llvm/test/CodeGen/X86/bypass-slow-division-64.ll b/llvm/test/CodeGen/X86/bypass-slow-division-64.ll
index 4aaeab4f2f130a..66d7082d9b7c55 100644
--- a/llvm/test/CodeGen/X86/bypass-slow-division-64.ll
+++ b/llvm/test/CodeGen/X86/bypass-slow-division-64.ll
@@ -7,7 +7,7 @@
 ; RUN: llc < %s -mtriple=x86_64-- -mcpu=x86-64-v3       | FileCheck %s --check-prefixes=CHECK,SLOW-DIVQ
 ; RUN: llc < %s -mtriple=x86_64-- -mcpu=x86-64-v4       | FileCheck %s --check-prefixes=CHECK,SLOW-DIVQ
 ; Intel
-; RUN: llc < %s -mtriple=x86_64-- -mcpu=nehalem         | FileCheck %s --check-prefixes=CHECK,FAST-DIVQ
+; RUN: llc < %s -mtriple=x86_64-- -mcpu=nehalem         | FileCheck %s --check-prefixes=CHECK,SLOW-DIVQ
 ; RUN: llc < %s -mtriple=x86_64-- -mcpu=sandybridge     | FileCheck %s --check-prefixes=CHECK,SLOW-DIVQ
 ; RUN: llc < %s -mtriple=x86_64-- -mcpu=haswell         | FileCheck %s --check-prefixes=CHECK,SLOW-DIVQ
 ; RUN: llc < %s -mtriple=x86_64-- -mcpu=skylake         | FileCheck %s --check-prefixes=CHECK,SLOW-DIVQ