Assertion failed: ((PartVT.isInteger() || PartVT == MVT::x86mmx) && ValueVT.isInteger() && "Unknown mismatch!"), function getCopyToParts

[DimitryAndric]

Bugzilla Link	23229
Resolution	DUPLICATE
Resolved on	Aug 17, 2015 08:26
Version	trunk
OS	All
CC	@emaste

Extended Description

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.

[DimitryAndric]

Mark this as a dupe of 23244, which has a nicer description.

*** This bug has been marked as a duplicate of bug llvm/llvm-bugzilla-archive#23244 ***

[DimitryAndric]

mentioned in issue llvm/llvm-bugzilla-archive#23244