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* [Bug ipa/82908] New: [8 regression] gcc.dg/tree-prof/cmpsf-1.c and gcc.dg/tree-prof/20050826-2.c fail starting with r254452
@ 2017-11-08 21:20 seurer at gcc dot gnu.org
0 siblings, 0 replies; only message in thread
From: seurer at gcc dot gnu.org @ 2017-11-08 21:20 UTC (permalink / raw)
To: gcc-bugs
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82908
Bug ID: 82908
Summary: [8 regression] gcc.dg/tree-prof/cmpsf-1.c and
gcc.dg/tree-prof/20050826-2.c fail starting with
r254452
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: ipa
Assignee: unassigned at gcc dot gnu.org
Reporter: seurer at gcc dot gnu.org
CC: marxin at gcc dot gnu.org
Target Milestone: ---
FAIL: gcc.dg/tree-prof/cmpsf-1.c scan-tree-dump-not dom2 "Invalid sum"
FAIL: gcc.dg/tree-prof/20050826-2.c scan-tree-dump-not dom2 "Invalid sum"
I am seeing this on powerpc64 both LE and BE.
Executing on host: /home/seurer/gcc/build/gcc-test2/gcc/xgcc
-B/home/seurer/gcc/build/gcc-test2/gcc/
/home/seurer/gcc/gcc-test2/gcc/testsuite/gcc.dg/tree-prof/20050826-2.c
-fno-diagnostics-show-caret -fdiagnostics-color=never -Ofast
-fdump-tree-dom2-all -fprofile-generate -D_PROFILE_GENERATE -lm -o
/home/seurer/gcc/build/gcc-test2/gcc/testsuite/gcc/20050826-2.x01 (timeout =
300)
spawn -ignore SIGHUP /home/seurer/gcc/build/gcc-test2/gcc/xgcc
-B/home/seurer/gcc/build/gcc-test2/gcc/
/home/seurer/gcc/gcc-test2/gcc/testsuite/gcc.dg/tree-prof/20050826-2.c
-fno-diagnostics-show-caret -fdiagnostics-color=never -Ofast
-fdump-tree-dom2-all -fprofile-generate -D_PROFILE_GENERATE -lm -o
/home/seurer/gcc/build/gcc-test2/gcc/testsuite/gcc/20050826-2.x01
PASS: gcc.dg/tree-prof/20050826-2.c compilation, -fprofile-generate
-D_PROFILE_GENERATE
Setting LD_LIBRARY_PATH to
:/home/seurer/gcc/build/gcc-test2/gcc:/home/seurer/gcc/build/gcc-test2/gcc/32::/home/seurer/gcc/build/gcc-test2/gcc:/home/seurer/gcc/build/gcc-test2/gcc/32:/home/seurer/gcc/build/gcc-test2/./gmp/.libs:/home/seurer/gcc/build/gcc-test2/./prev-gmp/.libs:/home/seurer/gcc/build/gcc-test2/./mpfr/src/.libs:/home/seurer/gcc/build/gcc-test2/./prev-mpfr/src/.libs:/home/seurer/gcc/build/gcc-test2/./mpc/src/.libs:/home/seurer/gcc/build/gcc-test2/./prev-mpc/src/.libs:/home/seurer/gcc/build/gcc-test2/./isl/.libs:/home/seurer/gcc/build/gcc-test2/./prev-isl/.libs:.:/home/seurer/gcc/build/gcc-test2/powerpc64le-unknown-linux-gnu/./libstdc++-v3/src/.libs:/home/seurer/gcc/build/gcc-test2/powerpc64le-unknown-linux-gnu/./libstdc++-v3/src/.libs:/home/seurer/gcc/build/gcc-test2/powerpc64le-unknown-linux-gnu/./libitm/.libs:/home/seurer/gcc/build/gcc-test2/gcc:/home/seurer/gcc/build/gcc-test2/powerpc64le-unknown-linux-gnu/./libsanitizer/asan/.libs:.:/home/seurer/gcc/build/gcc-test2/powerpc64le-unknown-linux-gnu/./libstdc++-v3/src/.libs:/home/seurer/gcc/build/gcc-test2/powerpc64le-unknown-linux-gnu/./libstdc++-v3/src/.libs:/home/seurer/gcc/build/gcc-test2/powerpc64le-unknown-linux-gnu/./libitm/.libs:/home/seurer/gcc/build/gcc-test2/gcc:/home/seurer/gcc/build/gcc-test2/powerpc64le-unknown-linux-gnu/./libsanitizer/asan/.libs:/home/seurer/gcc/build/gcc-test2/./gmp/.libs:/home/seurer/gcc/build/gcc-test2/./prev-gmp/.libs:/home/seurer/gcc/build/gcc-test2/./mpfr/src/.libs:/home/seurer/gcc/build/gcc-test2/./prev-mpfr/src/.libs:/home/seurer/gcc/build/gcc-test2/./mpc/src/.libs:/home/seurer/gcc/build/gcc-test2/./prev-mpc/src/.libs:/home/seurer/gcc/build/gcc-test2/./isl/.libs:/home/seurer/gcc/build/gcc-test2/./prev-isl/.libs:/home/seurer/gcc/install/gcc-7.1.0/lib64
spawn [open ...]
PASS: gcc.dg/tree-prof/20050826-2.c execution, -fprofile-generate
-D_PROFILE_GENERATE
Executing on host: /home/seurer/gcc/build/gcc-test2/gcc/xgcc
-B/home/seurer/gcc/build/gcc-test2/gcc/
/home/seurer/gcc/gcc-test2/gcc/testsuite/gcc.dg/tree-prof/20050826-2.c
-fno-diagnostics-show-caret -fdiagnostics-color=never -Ofast
-fdump-tree-dom2-all -fprofile-use -D_PROFILE_USE -lm -o
/home/seurer/gcc/build/gcc-test2/gcc/testsuite/gcc/20050826-2.x02 (timeout =
300)
spawn -ignore SIGHUP /home/seurer/gcc/build/gcc-test2/gcc/xgcc
-B/home/seurer/gcc/build/gcc-test2/gcc/
/home/seurer/gcc/gcc-test2/gcc/testsuite/gcc.dg/tree-prof/20050826-2.c
-fno-diagnostics-show-caret -fdiagnostics-color=never -Ofast
-fdump-tree-dom2-all -fprofile-use -D_PROFILE_USE -lm -o
/home/seurer/gcc/build/gcc-test2/gcc/testsuite/gcc/20050826-2.x02
PASS: gcc.dg/tree-prof/20050826-2.c compilation, -fprofile-use -D_PROFILE_USE
Setting LD_LIBRARY_PATH to
:/home/seurer/gcc/build/gcc-test2/gcc:/home/seurer/gcc/build/gcc-test2/gcc/32::/home/seurer/gcc/build/gcc-test2/gcc:/home/seurer/gcc/build/gcc-test2/gcc/32:/home/seurer/gcc/build/gcc-test2/./gmp/.libs:/home/seurer/gcc/build/gcc-test2/./prev-gmp/.libs:/home/seurer/gcc/build/gcc-test2/./mpfr/src/.libs:/home/seurer/gcc/build/gcc-test2/./prev-mpfr/src/.libs:/home/seurer/gcc/build/gcc-test2/./mpc/src/.libs:/home/seurer/gcc/build/gcc-test2/./prev-mpc/src/.libs:/home/seurer/gcc/build/gcc-test2/./isl/.libs:/home/seurer/gcc/build/gcc-test2/./prev-isl/.libs:.:/home/seurer/gcc/build/gcc-test2/powerpc64le-unknown-linux-gnu/./libstdc++-v3/src/.libs:/home/seurer/gcc/build/gcc-test2/powerpc64le-unknown-linux-gnu/./libstdc++-v3/src/.libs:/home/seurer/gcc/build/gcc-test2/powerpc64le-unknown-linux-gnu/./libitm/.libs:/home/seurer/gcc/build/gcc-test2/gcc:/home/seurer/gcc/build/gcc-test2/powerpc64le-unknown-linux-gnu/./libsanitizer/asan/.libs:.:/home/seurer/gcc/build/gcc-test2/powerpc64le-unknown-linux-gnu/./libstdc++-v3/src/.libs:/home/seurer/gcc/build/gcc-test2/powerpc64le-unknown-linux-gnu/./libstdc++-v3/src/.libs:/home/seurer/gcc/build/gcc-test2/powerpc64le-unknown-linux-gnu/./libitm/.libs:/home/seurer/gcc/build/gcc-test2/gcc:/home/seurer/gcc/build/gcc-test2/powerpc64le-unknown-linux-gnu/./libsanitizer/asan/.libs:/home/seurer/gcc/build/gcc-test2/./gmp/.libs:/home/seurer/gcc/build/gcc-test2/./prev-gmp/.libs:/home/seurer/gcc/build/gcc-test2/./mpfr/src/.libs:/home/seurer/gcc/build/gcc-test2/./prev-mpfr/src/.libs:/home/seurer/gcc/build/gcc-test2/./mpc/src/.libs:/home/seurer/gcc/build/gcc-test2/./prev-mpc/src/.libs:/home/seurer/gcc/build/gcc-test2/./isl/.libs:/home/seurer/gcc/build/gcc-test2/./prev-isl/.libs:/home/seurer/gcc/install/gcc-7.1.0/lib64
spawn [open ...]
PASS: gcc.dg/tree-prof/20050826-2.c execution, -fprofile-use -D_PROFILE_USE
FAIL: gcc.dg/tree-prof/20050826-2.c scan-tree-dump-not dom2 "Invalid sum"
UNSUPPORTED: gcc.dg/tree-prof/20050826-2.c -fauto-profile
testcase
/home/seurer/gcc/gcc-test2/gcc/testsuite/gcc.dg/tree-prof/tree-prof.exp
completed in 1 seconds
=== gcc Summary ===
# of expected passes 4
# of unexpected failures 1
# of unsupported tests 1
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Date: Wed, 08 Nov 2017 22:25:00 -0000
From: Jonathan Wakely <jwakely@redhat.com>
To: Nil Geisweiller <ngeiswei@googlemail.com>
Cc: gcc-bugs@gcc.gnu.org, gcc-help@gcc.gnu.org
Subject: Re: Bug in std::floor?
Message-ID: <20171108222503.GA2558@redhat.com>
References: <49c6843e-4596-fd46-7f38-ab75d4cc9794@gmail.com>
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The gcc-bugs@gcc email list is for automated email from our bug
tracking database, not for reporting bugs, and not for "is this a
bug?" questions. I've CC'd this to the gcc-help list where this is
more appropriate (please remove gcc-bugs from any follow-up replies).
On 08/11/17 23:13 +0200, Nil Geisweiller wrote:
>Hi,
>
>The following
>
>---------------------------------------------------------------------
>#include <iostream>
>#include <cmath>
>
>int main()
>{
> double v = 4.6;
> std::cout << "v = " << v << std::endl;
> std::cout << "v*100 = " << v*100 << std::endl;
> std::cout << "floor(v*100) = " << std::floor(v*100) << std::endl;
>}
>---------------------------------------------------------------------
>
>outputs
>
>------------------
>v = 4.6
>v*100 = 460
>floor(v*100) = 459
>------------------
>
>It that a bug?
No.
Try:
#include <iostream>
#include <iomanip>
#include <cmath>
int main()
{
double v = 4.6;
std::cout << "v = " << std::setprecision(17) << v << std::endl;
std::cout << "v*100 = " << std::setprecision(16) << v*100 << std::endl;
std::cout << "floor(v*100) = " << std::floor(v*100) << std::endl;
}
>If so where is the implementation of floor (so I can study and fix)? I
>know it is supposed to be in gcc/builtins.c but I don't understand
>where.
It doesn't necessarily use __builtin_floor anyway (without optimzation
it just calls the C library's floor(double) function).
>You may run the program above from http://tpcg.io/QNfhYr
>
>Thanks,
>
>Nil
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2017-11-08 21:20 [Bug ipa/82908] New: [8 regression] gcc.dg/tree-prof/cmpsf-1.c and gcc.dg/tree-prof/20050826-2.c fail starting with r254452 seurer at gcc dot gnu.org
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