llvm-6502/mul-lohi.ll at fb411c8b8ce42689d42b0d8e3a871d81f86a7298 - llvm-6502 - Applefritter: Git

6502/llvm-6502

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Tim Northover 4e1247b836 AArch64: don't try to handle [SU]MUL_LOHI nodes

We should set them to expand for now since there are no patterns
dealing with them. Actually, there are no instructions either so I
doubt they'll ever be acceptable.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199265 91177308-0d34-0410-b5e6-96231b3b80d8

2014-01-14 22:53:22 +00:00

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 ; RUN: llc -mtriple=aarch64-linux-gnu %s -o - | FileCheck %s
 define i128 @test_128bitmul(i128 %lhs, i128 %rhs) {
 ; CHECK: test_128bitmul:
 ; CHECK-DAG: umulh [[CARRY:x[0-9]+]], x0, x2
 ; CHECK-DAG: madd [[PART1:x[0-9]+]], x0, x3, [[CARRY]]
 ; CHECK: madd x1, x1, x2, [[PART1]]
 ; CHECK: mul x0, x0, x2
   %prod = mul i128 %lhs, %rhs
   ret i128 %prod
 }