[llvm-bugs] [Bug 33424] New: CodeGen crash for Mips64: Assertion in InstrEmitter:EmitSubregNode

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Mon Jun 12 11:33:51 PDT 2017


            Bug ID: 33424
           Summary: CodeGen crash for Mips64: Assertion in
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Backend: MIPS
          Assignee: unassignedbugs at nondot.org
          Reporter: pirama at google.com
                CC: llvm-bugs at lists.llvm.org

Created attachment 18623
  --> https://bugs.llvm.org/attachment.cgi?id=18623&action=edit
Simplified reproduction of Mips64 backend crash

void llvm::InstrEmitter::EmitSubregNode(llvm::SDNode*,
llvm::DenseMap<llvm::SDValue, unsigned int>&, bool, bool): Assertion `SRC &&
"No register class supports VT and SubIdx for INSERT_SUBREG"' failed.

Bugpoint-simplified testcase attached.  The issue was originally reported in
the Android NDK bugtracker (https://github.com/android-ndk/ndk/issues/419) and
has the full source that fails.

To reproduce, run: llc bugpoint-reduced-simplified.ll

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