[LLVMbugs] [Bug 22749] New: Internal compiler Cannot select FMADD

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Mon Mar 2 04:12:30 PST 2015


            Bug ID: 22749
           Summary: Internal compiler Cannot select FMADD
           Product: clang
           Version: 3.5
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: LLVM Codegen
          Assignee: unassignedclangbugs at nondot.org
          Reporter: paboyle at ph.ed.ac.uk
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

FMADD intrinsic fails during compile in C++ 11 code on clang-openmp branch.

fatal error: error in backend: Cannot select: 0x863ad78: v8f32 = X86ISD::FMADD
0x860ee08, 0x8617658, 0x863a640 [ORD=26] [ID=30]
  0x860ee08: v8f32,ch = load 0x860f120, 0x86abe50, 0x86ab718<LD32[%__A.addr.i]>
[ORD=23] [ID=28]
    0x86abe50: i64 = FrameIndex<0> [ID=8]
    0x86ab718: i64 = undef [ID=3]
  0x8617658: v8f32,ch = load 0x860f120, 0x8617f30, 0x86ab718<LD32[%__B.addr.i]>
[ORD=24] [ID=27]
    0x8617f30: i64 = FrameIndex<1> [ID=9]
    0x86ab718: i64 = undef [ID=3]
  0x863a640: v8f32,ch = load 0x860f648, 0x863b198, 0x86ab718<LD32[%v3]>
[ORD=19] [ID=19]
    0x863b198: i64,ch = CopyFromReg 0x85e2590, 0x86ac060 [ORD=12] [ID=15]
      0x86ac060: i64 = Register %vreg3 [ID=6]
    0x86ab718: i64 = undef [ID=3]
In function: _ZN3dpo3macERNS_6vRealFES0_S0_

Preprocessed source and runscript attached in tar file.

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