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76 :: Using Clang backend

• leledumbo (orginal) [2012-09-24T17:20:03+02:00] view original

  I want to use Nimrod with Clang backend and face a couple of problems:

  1. during ./build.sh, I got:

  fatal error: error in backend: Cannot select: 0xa60f430: i32 = shl 0xa6e5ce8, 0xa673070 [ID=36]

  0xa6e5ce8: i32 = fgetsign 0xa6e5710 [ID=31]

  0xa6e5710: f32 = fp_round 0xa621438, 0xa6e62c0 [ORD=839] [ID=29]

  0xa621438: f64,ch = CopyFromReg 0xa5de914, 0xa621900 [ORD=839] [ID=24]

  0xa621900: f64 = Register %vreg24 [ORD=839] [ID=1]

  0xa6e62c0: i32 = Constant<0> [ORD=839] [ID=2]

  0xa673070: i32 = Constant<31> [ID=23]

  Seems like Clang bug though, so I go back to gcc at this step.

  2. during koch boot -d:release (koch generated with Clang OK), compilation goes fine until linking. I got:

  clang -c -w -O3 -I/media/Sources/nimrod-0.9.0/lib -o compiler/nimcache/passaux.o compiler/nimcache/passaux.c clang -c -w -O3 -I/media/Sources/nimrod-0.9.0/lib -o compiler/nimcache/depends.o compiler/nimcache/depends.c clang -c -w -O3 -I/media/Sources/nimrod-0.9.0/lib -o compiler/nimcache/docgen2.o compiler/nimcache/docgen2.c clang -c -w -O3 -I/media/Sources/nimrod-0.9.0/lib -o compiler/nimcache/parseopt.o compiler/nimcache/parseopt.c Error: execution of an external program failed FAILURE

  going back to gcc shows that after this is indeed linking step.

  Any idea to make it work? I want to use Clang since it's much faster than gcc but can generate comparable code.

  My platform:

  • Kubuntu 12.04
  • Clang 3.0
  • gcc 4.6.3

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• Araq (orginal) [2012-09-25T07:14:44+02:00] view original

  Use --parallelBuild:1 (i.e. building with 1 CPU, i.e. no parallel building) to at least see what clang does not like.

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• leledumbo (orginal) [2012-09-25T18:29:59+02:00] view original

  With that option, koch doesn't output anything except the fatal error above. Here's the output:

  Hint: depends [Processing]

  Hint: docgen2 [Processing]

  Hint: parseopt [Processing]

  fatal error: error in backend: Cannot select: 0xa916a38: i32 = shl 0xa928c70, 0xa908278 [ID=36]

  0xa928c70: i32 = fgetsign 0xa927fb0 [ID=31]

  0xa927fb0: f32 = fp_round 0xa928720, 0xa927be0 [ORD=833] [ID=29]

  0xa928720: f64,ch = CopyFromReg 0xa8e3064, 0xa927d78 [ORD=833] [ID=24]

  0xa927d78: f64 = Register %vreg24 [ORD=833] [ID=1]

  0xa927be0: i32 = Constant<0> [ORD=833] [ID=2]

  0xa908278: i32 = Constant<31> [ID=23]

  Error: execution of an external program failed

  FAILURE

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