http://llvm.org/bugs/show_bug.cgi?id=21352
Bug ID: 21352
Summary: Vector lowering: Assertion `isReg() && "This is not a
register operand!"' failed.
Product: libraries
Version: trunk
Hardware: PC
OS: Windows NT
Status: NEW
Severity: normal
Priority: P
Component: Backend: X86
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
Created attachment 13241
--> http://llvm.org/bugs/attachment.cgi?id=13241&action=edit
Traceback
Bisected this to r219046, enabling new vector lowering by default.
This is about as reduced as I can make it, sorry...
source file and traceback attached.
$ clang -cc1 -O2 -std=c++11 -emit-obj bug8.cpp
...
MCInst.h:64: unsigned int llvm::MCOperand::getReg() const:
Assertion `isReg() && "This is not a register operand!"' failed.
....
Stack dump:
0. Program arguments:
/home/probinson/projects/llvm-org-tip/obj/Debug+Asserts/bin/clang -cc1 -O2
-std=c++11 -emit-obj bug8.cpp
1. <eof> parser at end of file
2. Code generation
3. Running pass 'Function Pass Manager' on module 'bug8.cpp'.
4. Running pass 'X86 Assembly / Object Emitter' on function '@_Z2llv'
$ cat bug8.cpp
typedef int int16 __attribute__((__vector_size__(16)));
typedef char char16 __attribute__((__vector_size__(16)));
struct AA {
void bb();
int cc();
int16 dd;
};
void AA::bb() {
dd = {};
}
int16 hh;
void ff() {
int16 jj = __extension__({
char16 kk =
(__builtin_ia32_psradi128(__extension__({
int16 kk = {};
kk;
}),
0));
__builtin_shufflevector((char16) {}, kk, 12, 13, 14, 15, 16, 17, 18, 19,
20,
21, 22, 23, 24, 25, 26, 27);
});
hh = jj;
}
void ll() {
AA nn;
ff();
nn.bb();
nn.cc();
}
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