[LLVMbugs] [Bug 23229] New: Assertion failed: ((PartVT.isInteger() || PartVT == MVT::x86mmx) && ValueVT.isInteger() && "Unknown mismatch!"), function getCopyToParts

[bugzilla-daemon at llvm.org]

https://llvm.org/bugs/show_bug.cgi?id=23229

            Bug ID: 23229
           Summary: Assertion failed: ((PartVT.isInteger() || PartVT ==
                    MVT::x86mmx) && ValueVT.isInteger() && "Unknown
                    mismatch!"), function getCopyToParts
           Product: new-bugs
           Version: trunk
          Hardware: PC
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: dimitry at andric.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

As reported in https://bugs.freebsd.org/199450, clang crashes with the
following assertion failure in SpiderMonkey's FoldConstants.cpp file, when
compiled for the armv6--freebsd11.0-gnueabihf target:

Assertion failed: ((PartVT.isInteger() || PartVT == MVT::x86mmx) &&
ValueVT.isInteger() && "Unknown mismatch!"), function getCopyToParts, file
/share/dim/src/llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp,
line 399.

This also reproduces with clang trunk r234702.

Reduced test case is:

======================================================================
a, b, c, d;
double e;
fn1() { asm("" : "=r"(a), "=&r"(b), "=&r"(c), "=&r"(d), "=&r"(e) : "4"(e)); }
======================================================================

Compile with:

clang -cc1 -triple armv6 -emit-obj -target-cpu arm1176jzf-s testcase.c

Note: the target-cpu setting is essential to trigger this assert.

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