https://llvm.org/bugs/show_bug.cgi?id=31483
Bug ID: 31483
Summary: New GVN causes a failure in some lnt tests on PowerPC
Product: libraries
Version: trunk
Hardware: PC
OS: All
Status: NEW
Severity: normal
Priority: P
Component: Scalar Optimizations
Assignee: unassignedb...@nondot.org
Reporter: nemanja.i....@gmail.com
CC: llvm-bugs@lists.llvm.org
Classification: Unclassified
The following has been reduced by creduce from
projects/test-suite/SingleSource/UnitTests/2003-08-11-VaListArg.c
#include <stdarg.h>
test(char *fmt, va_list ap) {
char *s;
while (*fmt)
switch (*fmt++) {
case 's':
s = va_arg(ap, char *);
printf("string %s\n", s);
break;
case 'i':
case 'c':
va_arg(ap, int);
}
va_end(ap);
}
testVaListArg(*fmt, ...) {
va_list ap;
va_start(ap, fmt);
test(fmt, ap);
}
main() {
testVaListArg("ssiciiiiis", "", "def", 3, 'a', 3, 6, 7, 8, 9, "10 args
done");
}
That is one of the test cases that fails with -mllvm -new-gvn.
The complete command line to build it is:
clang -I $LNT_BUILD_DIR/SingleSource/UnitTests -I
$LLVM_SRC/projects/test-suite/SingleSource/UnitTests -I
$LLVM_SRC/projects/test-suite/include -I../../include -D_GNU_SOURCE
-D__STDC_LIMIT_MACROS -DNDEBUG -O3 -mllvm -enable-newgvn -ffp-contract=off
-ffp-contract=off -fomit-frame-pointer 2003-08-11-VaListArg.c
I understand that access to a PPC machine is sometimes tricky to get so if this
is somehow unique to PPC, I'm happy to assist with providing further
information.
This is with revision 290604 of trunk.
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