Error: Unsupported asm: input constraint with a matching output constraint of incompatible type!

Clang Frontend
#1

Hi all,

I am trying to compile bitvisor-1.1, a hypervisor with clang distributed with llvm-2.8. I am getting the following error

Unsupported asm: input constraint with a matching
output constraint of incompatible type!

gcc works with the benchmark and compiles it. What should I do to get it compiling with clang?

Thanks,
Santosh

#2

First, see if this looks like PR 3373 (see Bugzilla link on llvm.org).
If not, build llvm TOT (top of tree) from source following the directions on the website, and see if it's been fixed; some bugs in this area were fixed recently.
If not, file a new bug report, with reproducible test case. llvm-gcc -save-temps should get you a .i file, which is what we need.