<div dir="ltr"><div dir="ltr">Thanks for reporting that this depends on the host compiler.<div><br></div><div>I disabled the test again in r353836 and will look into why the output is different depending on if host cc is gcc or clang.</div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Feb 12, 2019 at 2:40 AM Mikael Holmén <<a href="mailto:mikael.holmen@ericsson.com">mikael.holmen@ericsson.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Same thing for me with our downstream build bots.<br>
<br>
When we compile clang with gcc 7.4 and then run the testcase I get this <br>
output<br>
<br>
define dso_local i64 @test__shiftleft128(i64 %l, i64 %h, i8 %d) <br>
local_unnamed_addr #0 {<br>
entry:<br>
%0 = zext i64 %l to i128<br>
%1 = zext i64 %h to i128<br>
%2 = shl nuw i128 %1, 64<br>
%3 = or i128 %2, %0<br>
%4 = and i8 %d, 63<br>
%5 = zext i8 %4 to i128<br>
%6 = shl i128 %3, %5<br>
%7 = lshr i128 %6, 64<br>
%8 = trunc i128 %7 to i64<br>
ret i64 %8<br>
}<br>
<br>
and when I compile clang with clang 3.6 and run the test I get this:<br>
<br>
define dso_local i64 @test__shiftleft128(i64 %l, i64 %h, i8 %d) <br>
local_unnamed_addr #0 {<br>
entry:<br>
%0 = zext i64 %h to i128<br>
%1 = shl nuw i128 %0, 64<br>
%2 = zext i64 %l to i128<br>
%3 = or i128 %1, %2<br>
%4 = and i8 %d, 63<br>
%5 = zext i8 %4 to i128<br>
%6 = shl i128 %3, %5<br>
%7 = lshr i128 %6, 64<br>
%8 = trunc i128 %7 to i64<br>
ret i64 %8<br>
}<br>
<br>
/Mikael<br>
<br>
On 2/12/19 2:03 AM, Nico Weber via cfe-commits wrote:<br>
> Thank you for the .ll files!<br>
> <br>
> the -4.ll file you sent me contains:<br>
> <br>
> define dso_local i64 @"?test__shiftleft128@@YA_K_K0E@Z"(i64 %l, i64 %h, <br>
> i8 %d) local_unnamed_addr #0 {<br>
> entry:<br>
> %0 = zext i64 %h to i128<br>
> %1 = shl nuw i128 %0, 64<br>
> %2 = zext i64 %l to i128<br>
> %3 = or i128 %1, %2<br>
> %4 = and i8 %d, 63<br>
> %5 = zext i8 %4 to i128<br>
> %6 = shl i128 %3, %5<br>
> %7 = lshr i128 %6, 64<br>
> %8 = trunc i128 %7 to i64<br>
> ret i64 %8<br>
> }<br>
> <br>
> On my local system, I get<br>
> <br>
> ; Function Attrs: minsize norecurse nounwind optsize readnone<br>
> define dso_local i64 @test__shiftleft128(i64 %l, i64 %h, i8 %d) <br>
> local_unnamed_addr #0 {<br>
> entry:<br>
> %0 = zext i64 %l to i128<br>
> %1 = zext i64 %h to i128<br>
> %2 = shl nuw i128 %1, 64<br>
> %3 = or i128 %2, %0<br>
> %4 = and i8 %d, 63<br>
> %5 = zext i8 %4 to i128<br>
> %6 = shl i128 %3, %5<br>
> %7 = lshr i128 %6, 64<br>
> %8 = trunc i128 %7 to i64<br>
> ret i64 %8<br>
> }<br>
> <br>
> That's identical except for the order of the instructions (which in turn <br>
> changes some % numbers).<br>
> <br>
> That's surprising to me; I thought LLVM IR is deterministic (and if it <br>
> wasn't, many other tests wouldn't work either).<br>
> <br>
> On Mon, Feb 11, 2019 at 4:20 PM Galina Kistanova <<a href="mailto:gkistanova@gmail.com" target="_blank">gkistanova@gmail.com</a> <br>
> <mailto:<a href="mailto:gkistanova@gmail.com" target="_blank">gkistanova@gmail.com</a>>> wrote:<br>
> <br>
> Hello Nico,<br>
> <br>
> This builders fail on your test as well -<br>
> <a href="http://lab.llvm.org:8011/builders/llvm-clang-x86_64-expensive-checks-win/builds/15736" rel="noreferrer" target="_blank">http://lab.llvm.org:8011/builders/llvm-clang-x86_64-expensive-checks-win/builds/15736</a>,<br>
> <a href="http://lab.llvm.org:8011/builders/clang-x64-windows-msvc/builds/4242" rel="noreferrer" target="_blank">http://lab.llvm.org:8011/builders/clang-x64-windows-msvc/builds/4242</a>.<br>
> <br>
> Please find attached the 2 temp files you can use to reliably run<br>
> against your FileCheck patterns.<br>
> Hope this would help debugging.<br>
> <br>
> Please also notice the warnings each of the RUN command produces.<br>
> The warnings should be quite easy to reproduce and address.<br>
> <br>
> In the mean time, could you revert the change unless you expect the<br>
> fix coming really soon, please?<br>
> It is not a good idea to keep the bots red for long.<br>
> <br>
> Here is the log:<br>
> ----------------------------------------------------------------------<br>
> <br>
> C:\>c:\ps4-buildslave2\llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast\llvm.obj\bin\clang.exe<br>
> -cc1 -internal-isystem<br>
> c:\ps4-buildslave2\llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast\llvm.obj\lib\clang\9.0.0\include<br>
> -nostdsysteminc -ffreestanding -fms-extensions -fms-compatibility<br>
> -fms-compatibility-version=17.00 -triple i686--windows -Oz<br>
> -emit-llvm<br>
> C:\ps4-buildslave2\llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast\llvm.src\tools\clang\test\CodeGen\ms-x86-intrinsics.c<br>
> -o - > \tmp-1\ms-x86-intrinsics-1.ll<br>
> C:\ps4-buildslave2\llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast\llvm.src\tools\clang\test\CodeGen\ms-x86-intrinsics.c:10:10:<br>
> warning: implicitly declaring library function '__readfsbyte' with<br>
> type 'unsigned char (unsigned long)'<br>
> return __readfsbyte(++Offset);<br>
> ^<br>
> C:\ps4-buildslave2\llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast\llvm.src\tools\clang\test\CodeGen\ms-x86-intrinsics.c:10:10:<br>
> note: include the header <intrin.h> or explicitly provide a<br>
> declaration for '__readfsbyte'<br>
> C:\ps4-buildslave2\llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast\llvm.src\tools\clang\test\CodeGen\ms-x86-intrinsics.c:19:10:<br>
> warning: implicitly declaring library function '__readfsword' with<br>
> type 'unsigned short (unsigned long)'<br>
> return __readfsword(++Offset);<br>
> ^<br>
> C:\ps4-buildslave2\llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast\llvm.src\tools\clang\test\CodeGen\ms-x86-intrinsics.c:19:10:<br>
> note: include the header <intrin.h> or explicitly provide a<br>
> declaration for '__readfsword'<br>
> C:\ps4-buildslave2\llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast\llvm.src\tools\clang\test\CodeGen\ms-x86-intrinsics.c:28:10:<br>
> warning: implicitly declaring library function '__readfsdword' with<br>
> type 'unsigned long (unsigned long)'<br>
> return __readfsdword(++Offset);<br>
> ^<br>
> C:\ps4-buildslave2\llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast\llvm.src\tools\clang\test\CodeGen\ms-x86-intrinsics.c:28:10:<br>
> note: include the header <intrin.h> or explicitly provide a<br>
> declaration for '__readfsdword'<br>
> C:\ps4-buildslave2\llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast\llvm.src\tools\clang\test\CodeGen\ms-x86-intrinsics.c:37:10:<br>
> warning: implicitly declaring library function '__readfsqword' with<br>
> type 'unsigned long long (unsigned long)'<br>
> return __readfsqword(++Offset);<br>
> ^<br>
> C:\ps4-buildslave2\llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast\llvm.src\tools\clang\test\CodeGen\ms-x86-intrinsics.c:37:10:<br>
> note: include the header <intrin.h> or explicitly provide a<br>
> declaration for '__readfsqword'<br>
> C:\ps4-buildslave2\llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast\llvm.src\tools\clang\test\CodeGen\ms-x86-intrinsics.c:47:10:<br>
> warning: implicitly declaring library function '__emul' with type<br>
> 'long long (int, int)'<br>
> return __emul(a, b);<br>
> ^<br>
> C:\ps4-buildslave2\llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast\llvm.src\tools\clang\test\CodeGen\ms-x86-intrinsics.c:47:10:<br>
> note: include the header <intrin.h> or explicitly provide a<br>
> declaration for '__emul'<br>
> C:\ps4-buildslave2\llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast\llvm.src\tools\clang\test\CodeGen\ms-x86-intrinsics.c:56:10:<br>
> warning: implicitly declaring library function '__emulu' with type<br>
> 'unsigned long long (unsigned int, unsigned int)'<br>
> return __emulu(a, b);<br>
> ^<br>
> C:\ps4-buildslave2\llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast\llvm.src\tools\clang\test\CodeGen\ms-x86-intrinsics.c:56:10:<br>
> note: include the header <intrin.h> or explicitly provide a<br>
> declaration for '__emulu'<br>
> 6 warnings generated.<br>
> <br>
> -----------------------------------------------------------------------<br>
> <br>
> C:\>c:\ps4-buildslave2\llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast\llvm.obj\bin\clang.exe<br>
> -cc1 -internal-isystem<br>
> c:\ps4-buildslave2\llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast\llvm.obj\lib\clang\9.0.0\include<br>
> -nostdsysteminc -ffreestanding -fms-extensions -fms-compatibility<br>
> -fms-compatibility-version=17.00 -triple x86_64--windows<br>
> -Oz -emit-llvm<br>
> C:\ps4-buildslave2\llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast\llvm.src\tools\clang\test\CodeGen\ms-x86-intrinsics.c<br>
> -o - > \tmp-1\ms-x86-intrinsics-4.ll<br>
> C:\ps4-buildslave2\llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast\llvm.src\tools\clang\test\CodeGen\ms-x86-intrinsics.c:47:10:<br>
> warning: implicitly declaring library function '__emul' with type<br>
> 'long long (int, int)'<br>
> return __emul(a, b);<br>
> ^<br>
> C:\ps4-buildslave2\llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast\llvm.src\tools\clang\test\CodeGen\ms-x86-intrinsics.c:47:10:<br>
> note: include the header <intrin.h> or explicitly provide a<br>
> declaration for '__emul'<br>
> C:\ps4-buildslave2\llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast\llvm.src\tools\clang\test\CodeGen\ms-x86-intrinsics.c:56:10:<br>
> warning: implicitly declaring library function '__emulu' with type<br>
> 'unsigned long long (unsigned int, unsigned int)'<br>
> return __emulu(a, b);<br>
> ^<br>
> C:\ps4-buildslave2\llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast\llvm.src\tools\clang\test\CodeGen\ms-x86-intrinsics.c:56:10:<br>
> note: include the header <intrin.h> or explicitly provide a<br>
> declaration for '__emulu'<br>
> C:\ps4-buildslave2\llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast\llvm.src\tools\clang\test\CodeGen\ms-x86-intrinsics.c:67:10:<br>
> warning: implicitly declaring library function '__readgsbyte' with<br>
> type 'unsigned char (unsigned long)'<br>
> return __readgsbyte(++Offset);<br>
> ^<br>
> C:\ps4-buildslave2\llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast\llvm.src\tools\clang\test\CodeGen\ms-x86-intrinsics.c:67:10:<br>
> note: include the header <intrin.h> or explicitly provide a<br>
> declaration for '__readgsbyte'<br>
> C:\ps4-buildslave2\llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast\llvm.src\tools\clang\test\CodeGen\ms-x86-intrinsics.c:77:10:<br>
> warning: implicitly declaring library function '__readgsword' with<br>
> type 'unsigned short (unsigned long)'<br>
> return __readgsword(++Offset);<br>
> ^<br>
> C:\ps4-buildslave2\llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast\llvm.src\tools\clang\test\CodeGen\ms-x86-intrinsics.c:77:10:<br>
> note: include the header <intrin.h> or explicitly provide a<br>
> declaration for '__readgsword'<br>
> C:\ps4-buildslave2\llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast\llvm.src\tools\clang\test\CodeGen\ms-x86-intrinsics.c:87:10:<br>
> warning: implicitly declaring library function '__readgsdword' with<br>
> type 'unsigned long (unsigned long)'<br>
> return __readgsdword(++Offset);<br>
> ^<br>
> C:\ps4-buildslave2\llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast\llvm.src\tools\clang\test\CodeGen\ms-x86-intrinsics.c:87:10:<br>
> note: include the header <intrin.h> or explicitly provide a<br>
> declaration for '__readgsdword'<br>
> C:\ps4-buildslave2\llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast\llvm.src\tools\clang\test\CodeGen\ms-x86-intrinsics.c:97:10:<br>
> warning: implicitly declaring library function '__readgsqword' with<br>
> type 'unsigned long long (unsigned long)'<br>
> return __readgsqword(++Offset);<br>
> ^<br>
> C:\ps4-buildslave2\llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast\llvm.src\tools\clang\test\CodeGen\ms-x86-intrinsics.c:97:10:<br>
> note: include the header <intrin.h> or explicitly provide a<br>
> declaration for '__readgsqword'<br>
> C:\ps4-buildslave2\llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast\llvm.src\tools\clang\test\CodeGen\ms-x86-intrinsics.c:107:10:<br>
> warning: implicitly declaring library function '__mulh' with type<br>
> 'long long (long long, long long)'<br>
> return __mulh(a, b);<br>
> ^<br>
> C:\ps4-buildslave2\llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast\llvm.src\tools\clang\test\CodeGen\ms-x86-intrinsics.c:107:10:<br>
> note: include the header <intrin.h> or explicitly provide a<br>
> declaration for '__mulh'<br>
> C:\ps4-buildslave2\llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast\llvm.src\tools\clang\test\CodeGen\ms-x86-intrinsics.c:113:10:<br>
> warning: implicitly declaring library function '__umulh' with type<br>
> 'unsigned long long (unsigned long long, unsigned long long)'<br>
> return __umulh(a, b);<br>
> ^<br>
> C:\ps4-buildslave2\llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast\llvm.src\tools\clang\test\CodeGen\ms-x86-intrinsics.c:113:10:<br>
> note: include the header <intrin.h> or explicitly provide a<br>
> declaration for '__umulh'<br>
> C:\ps4-buildslave2\llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast\llvm.src\tools\clang\test\CodeGen\ms-x86-intrinsics.c:121:10:<br>
> warning: implicitly declaring library function '_mul128' with type<br>
> 'long long (long long, long long, long long *)'<br>
> return _mul128(Multiplier, Multiplicand, HighProduct);<br>
> ^<br>
> C:\ps4-buildslave2\llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast\llvm.src\tools\clang\test\CodeGen\ms-x86-intrinsics.c:121:10:<br>
> note: include the header <intrin.h> or explicitly provide a<br>
> declaration for '_mul128'<br>
> C:\ps4-buildslave2\llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast\llvm.src\tools\clang\test\CodeGen\ms-x86-intrinsics.c:133:10:<br>
> warning: implicitly declaring library function '_umul128' with type<br>
> 'unsigned long long (unsigned long long, unsigned long long,<br>
> unsigned long long *)'<br>
> return _umul128(Multiplier, Multiplicand, HighProduct);<br>
> ^<br>
> C:\ps4-buildslave2\llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast\llvm.src\tools\clang\test\CodeGen\ms-x86-intrinsics.c:133:10:<br>
> note: include the header <intrin.h> or explicitly provide a<br>
> declaration for '_umul128'<br>
> C:\ps4-buildslave2\llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast\llvm.src\tools\clang\test\CodeGen\ms-x86-intrinsics.c:144:10:<br>
> warning: implicitly declaring library function '__shiftleft128' with<br>
> type 'unsigned long long (unsigned long long, unsigned long long,<br>
> unsigned char)'<br>
> return __shiftleft128(l, h, d);<br>
> ^<br>
> C:\ps4-buildslave2\llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast\llvm.src\tools\clang\test\CodeGen\ms-x86-intrinsics.c:144:10:<br>
> note: include the header <intrin.h> or explicitly provide a<br>
> declaration for '__shiftleft128'<br>
> C:\ps4-buildslave2\llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast\llvm.src\tools\clang\test\CodeGen\ms-x86-intrinsics.c:159:10:<br>
> warning: implicitly declaring library function '__shiftright128'<br>
> with type 'unsigned long long (unsigned long long, unsigned long<br>
> long, unsigned char)'<br>
> return __shiftright128(l, h, d);<br>
> ^<br>
> C:\ps4-buildslave2\llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast\llvm.src\tools\clang\test\CodeGen\ms-x86-intrinsics.c:159:10:<br>
> note: include the header <intrin.h> or explicitly provide a<br>
> declaration for '__shiftright128'<br>
> 12 warnings generated.<br>
> <br>
> Thanks<br>
> <br>
> Galina<br>
> <br>
> <br>
> On Mon, Feb 11, 2019 at 12:10 PM Nico Weber <<a href="mailto:thakis@chromium.org" target="_blank">thakis@chromium.org</a><br>
> <mailto:<a href="mailto:thakis@chromium.org" target="_blank">thakis@chromium.org</a>>> wrote:<br>
> <br>
> This still didn't help.<br>
> <br>
> I can't repro the failures<br>
> onhttp://<a href="http://lab.llvm.org:8011/builders/llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast" rel="noreferrer" target="_blank">lab.llvm.org:8011/builders/llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast</a><br>
> <<a href="http://lab.llvm.org:8011/builders/llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast" rel="noreferrer" target="_blank">http://lab.llvm.org:8011/builders/llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast</a>><br>
> , I tried Rel+Asserts and Rel-Asserts builds. Can anyone else<br>
> repro this?<br>
> <br>
> On Mon, Feb 11, 2019 at 1:01 PM Nico Weber via cfe-commits<br>
> <<a href="mailto:cfe-commits@lists.llvm.org" target="_blank">cfe-commits@lists.llvm.org</a> <mailto:<a href="mailto:cfe-commits@lists.llvm.org" target="_blank">cfe-commits@lists.llvm.org</a>>><br>
> wrote:<br>
> <br>
> Author: nico<br>
> Date: Mon Feb 11 10:01:27 2019<br>
> New Revision: 353729<br>
> <br>
> URL: <a href="http://llvm.org/viewvc/llvm-project?rev=353729&view=rev" rel="noreferrer" target="_blank">http://llvm.org/viewvc/llvm-project?rev=353729&view=rev</a><br>
> Log:<br>
> Attempt to pacify bots more after r353718 and r353725<br>
> <br>
> Modified:<br>
> cfe/trunk/test/CodeGen/ms-x86-intrinsics.c<br>
> <br>
> Modified: cfe/trunk/test/CodeGen/ms-x86-intrinsics.c<br>
> URL:<br>
> <a href="http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGen/ms-x86-intrinsics.c?rev=353729&r1=353728&r2=353729&view=diff" rel="noreferrer" target="_blank">http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGen/ms-x86-intrinsics.c?rev=353729&r1=353728&r2=353729&view=diff</a><br>
> ==============================================================================<br>
> --- cfe/trunk/test/CodeGen/ms-x86-intrinsics.c (original)<br>
> +++ cfe/trunk/test/CodeGen/ms-x86-intrinsics.c Mon Feb 11<br>
> 10:01:27 2019<br>
> @@ -145,9 +145,9 @@ unsigned __int64 test__shiftleft128(unsi<br>
> }<br>
> // CHECK-X64-LABEL: define dso_local i64<br>
> @test__shiftleft128(i64 %l, i64 %h, i8 %d)<br>
> // CHECK-X64: = zext i64 %{{.*}} to i128<br>
> -// CHECK-X64: = shl nuw i128 %0, 64<br>
> +// CHECK-X64: = shl nuw i128 %{{.*}}, 64<br>
> // CHECK-X64: = zext i64 %{{.*}} to i128<br>
> -// CHECK-X64: = or i128 %{{.*}}, %{{.*}}<br>
> +// CHECK-X64: = or i128 %<br>
> // CHECK-X64: = and i8 %{{.*}}, 63<br>
> // CHECK-X64: = shl i128 %<br>
> // CHECK-X64: = lshr i128 %<br>
> @@ -160,7 +160,7 @@ unsigned __int64 test__shiftright128(uns<br>
> }<br>
> // CHECK-X64-LABEL: define dso_local i64<br>
> @test__shiftright128(i64 %l, i64 %h, i8 %d)<br>
> // CHECK-X64: = zext i64 %{{.*}} to i128<br>
> -// CHECK-X64: = shl nuw i128 %<br>
> +// CHECK-X64: = shl nuw i128 %{{.*}}, 64<br>
> // CHECK-X64: = zext i64 %{{.*}} to i128<br>
> // CHECK-X64: = or i128 %<br>
> // CHECK-X64: = and i8 %{{.*}}, 63<br>
> <br>
> <br>
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</blockquote></div>