https://llvm.org/bugs/show_bug.cgi?id=30298
Bug ID: 30298
Summary: Compiling libx264 (target-cpu i686 +sse): Do not know
how to custom type legalize this operation!
Product: new-bugs
Version: trunk
Hardware: PC
OS: All
Status: NEW
Severity: normal
Priority: P
Component: new bugs
Assignee: unassignedb...@nondot.org
Reporter: dimi...@andric.com
CC: llvm-bugs@lists.llvm.org
Classification: Unclassified
Building libx264 from the FreeBSD ports collection with clang 3.9.0 release, on
a 32-bit host, enabling SSE, results in:
clang -Wshadow -O3 -ffast-math -m32 -O2 -pipe -isystem /usr/local/include
-fstack-protector -fno-strict-aliasing -Wall -I. -I. -isystem
/usr/local/include -O2 -pipe -isystem /usr/local/include -fstack-protector
-fno-strict-aliasing -march=i686 -mfpmath=sse -msse -std=gnu99
-fomit-frame-pointer -fno-tree-vectorize -isystem /usr/local/include -c -o
common/pixel.o common/pixel.c
Do not know how to custom type legalize this operation!
UNREACHABLE executed at
/share/dim/src/freebsd/base/projects/clang390-import/contrib/llvm/lib/Target/X86/X86ISelLowering.cpp:21834!
This also occurs with trunk r280722, but not with 3.8.0 release, so it a
regression.
Minimized test case:
// clang -cc1 -triple i386 -S -target-cpu i686 -target-feature +sse -O2 -w
-vectorize-slp testcase.c
char *a, *b;
e;
static fn1(long long *p1, long long *p2) {
for (;;) {
int c = a[0] - b[0], d = a[1] - b[1];
*p1 += c * c;
*p2 += d * d;
}
}
fn2() { fn1(fn2, &e); }
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