[llvm] 6f5670a - Revert "[Passes] Enable the relative lookup table converter pass on aarch64"

[Martin Storsjö via llvm-commits]

Author: Martin Storsjö
Date: 2021-05-05T15:23:14+03:00
New Revision: 6f5670a4c3d8c079d4b676140ee69e5cc235d5a8

URL: https://github.com/llvm/llvm-project/commit/6f5670a4c3d8c079d4b676140ee69e5cc235d5a8
DIFF: https://github.com/llvm/llvm-project/commit/6f5670a4c3d8c079d4b676140ee69e5cc235d5a8.diff

LOG: Revert "[Passes] Enable the relative lookup table converter pass on aarch64"

This reverts commit 57b259a852a6383880f5d0875d848420bb3c2945.

The relative lookup table converter pass seems to cause problems
for chromium on Windows/ARM64, see https://crbug.com/1204788.

Added: 
    

Modified: 
    llvm/include/llvm/CodeGen/BasicTTIImpl.h

Removed: 
    


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diff  --git a/llvm/include/llvm/CodeGen/BasicTTIImpl.h b/llvm/include/llvm/CodeGen/BasicTTIImpl.h
index dbd3d6cb9a7b2..c03d589e888fa 100644
--- a/llvm/include/llvm/CodeGen/BasicTTIImpl.h
+++ b/llvm/include/llvm/CodeGen/BasicTTIImpl.h
@@ -450,6 +450,11 @@ class BasicTTIImplBase : public TargetTransformInfoImplCRTPBase<T> {
     if (!TargetTriple.isArch64Bit())
       return false;
 
+    // TODO: Triggers an issue in aarch64, so temporarily disable it.
+    // See https://reviews.llvm.org/D99572 for more information.
+    if (TargetTriple.getArch() == Triple::aarch64)
+      return false;
+
     return true;
   }