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Disable llvm generating 128-bit multiply libcalls on 32-bit ARM

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Merge commit 789708617d20 from llvm git (Koutheir Attouchi):

  Do not generate calls to the 128-bit function __multi3() on 32-bit ARM

  Re-applying this patch after bots failures. Should be fine now.

  The function __multi3() is undefined on 32-bit ARM, so a call to it should
  never be emitted. Instead, plain instructions need to be generated to
  perform 128-bit multiplications.

  Differential Revision: https://reviews.llvm.org/D103906

Reported by:	mmel
MFC after:	3 days
This commit is contained in:
Dimitry Andric 2021-06-22 22:26:13 +02:00
parent df3b437c1e
commit 014a40f8f6
1 changed files with 1 additions and 0 deletions
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contrib/llvm-project/llvm/lib/Target/ARM/ARMISelLowering.cpp
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@ -541,6 +541,7 @@ ARMTargetLowering::ARMTargetLowering(const TargetMachine &TM,
setLibcallName(RTLIB::SHL_I128, nullptr);
setLibcallName(RTLIB::SRL_I128, nullptr);
setLibcallName(RTLIB::SRA_I128, nullptr);
setLibcallName(RTLIB::MUL_I128, nullptr);
// RTLIB
if (Subtarget->isAAPCS_ABI() &&