LLVM Backend generates assembly unparsable by gnu toolchains

module Main where

import System.Random
import qualified Data.Vector as V

g1 = mkStdGen 0 :: StdGen
v2 = take 10000 $ randoms g1 :: [Int]

main :: IO ()
main = do
    undefined

$ /e/ghc_regSpill/inplace/bin/ghc-stage2.exe Repro.hs -O2 -fllvm -O2
Loaded package environment from C:\ghc\msys64\home\Andi\tmp\minmax\unpred\.ghc.environment.x86_64-mingw32-8.7.20190215
[1 of 1] Compiling Main             ( Repro.hs, Repro.o )
C:\\ghc\\msys64\\tmp\\ghc385768_0\\ghc_6.s: Assembler messages:
C:\\ghc\\msys64\\tmp\\ghc385768_0\\ghc_6.s:354: Error: junk at end of line, first unrecognized character is `,'
`gcc.exe' failed in phase `Assembler'. (Exit code: 1)

I've reproduced this with ghc 8.4/8.6 and HEAD using llvm 7.0.1 on windows.

It only occurs with -O2.

The issues arise from these directives:

	.section	.rdata,"dr",discard,__xmm@000000000000004e0000000000000000

Trac metadata

Trac field	Value
Version	8.9
Type	Bug
TypeOfFailure	OtherFailure
Priority	high
Resolution	Unresolved
Component	Compiler (LLVM)
Test case
Differential revisions
BlockedBy
Related
Blocking
CC
Operating system	Unknown/Multiple
Architecture