[llvm] r330437 - [DAGCombine] (float)((int) f) --> ftrunc (PR36617)
Jorge Gorbe Moya via llvm-commits
llvm-commits at lists.llvm.org
Wed Apr 25 18:16:09 PDT 2018
Hi Sanjay,
Could you give us an approximate ETA for the flag to control the new
behavior?
Cheers,
Jorge
On Wed, Apr 25, 2018 at 4:29 PM Chandler Carruth via llvm-commits <
llvm-commits at lists.llvm.org> wrote:
> +1
>
> I will say, what i want right now is the flag to go back to the old
> behavior. ;] Our releases will end up blocked on this.
>
> On Wed, Apr 25, 2018 at 4:00 PM Stephen Canon <scanon at apple.com> wrote:
>
>> We should also add an intrinsic for fpto[us]I with defined overflow
>> behavior, and have the sanitizer call it to people’s attention. Otherwise
>> people will roll their own clamping and most of them will get it wrong,
>> because INT_MAX isn’t representable as a float.
>>
>> Ideally we should expose this at the clang level as something like bool
>> __builtin_convert_overflow(src, &dst) and make the one builtin work across
>> types, as with __builtin_add_overflow and friends.
>>
>> – Steve
>>
>>
>> On Apr 25, 2018, at 6:11 PM, Chandler Carruth via llvm-commits <
>> llvm-commits at lists.llvm.org> wrote:
>>
>> On Wed, Apr 25, 2018 at 2:58 PM Sanjay Patel <spatel at rotateright.com>
>> wrote:
>>
>>> Damn...
>>>
>>> 1. I've never actually used the sanitizers for anything more than simple
>>> experiments. But a look at the docs and simple test says this will do it:
>>> https://clang.llvm.org/docs/UndefinedBehaviorSanitizer.html
>>> -fsanitize=float-cast-overflow
>>>
>>
>> If this covers everything, great. Maybe document this in the release
>> notes as well?
>>
>>
>>> 2. Yes, that's probably wiser. -fjunk-in-trunc ? :)
>>>
>>
>> -fstrict-fp-trunc-semantics maybe?
>>
>> Or maybe we should phrase it more:
>>
>> -ffp-cast-overflow-workaround
>>
>> To make it clear that enabling this is a bad idea and something that
>> needs to go away?
>>
>> We should be *really* clear around the documentation of the flag that it
>> will not be supported long term and will go away in a future release. (And
>> be really clear about that in the release notes as well.)
>>
>> May make sense to make it CC1 only.
>>
>> Anyways, all of this is a better clang commits list discussion. =]
>>
>>
>>>
>>>
>>>
>>> On Wed, Apr 25, 2018 at 3:38 PM, Chandler Carruth <chandlerc at gmail.com>
>>> wrote:
>>>
>>>> Hey Sanjay, this is hitting a *lot* of code, even outside of Chrome....
>>>>
>>>> I think we need a more nuanced way to handle this.
>>>>
>>>> 1) Is there a specific sanitizer that we can enable that will point out
>>>> *just* the issues this impacts?
>>>>
>>>> 2) Can we have a flag to control this behavior at least for a temporary
>>>> period of time? that would make it much easier to roll out when there are
>>>> very large numbers of issues encountered.
>>>>
>>>> On Fri, Apr 20, 2018 at 8:11 AM Sanjay Patel via llvm-commits <
>>>> llvm-commits at lists.llvm.org> wrote:
>>>>
>>>>> Author: spatel
>>>>> Date: Fri Apr 20 08:07:55 2018
>>>>> New Revision: 330437
>>>>>
>>>>> URL: http://llvm.org/viewvc/llvm-project?rev=330437&view=rev
>>>>> Log:
>>>>> [DAGCombine] (float)((int) f) --> ftrunc (PR36617)
>>>>>
>>>>> This was originally committed at rL328921 and reverted at rL329920 to
>>>>> investigate failures in Chrome. This time I've added to the
>>>>> ReleaseNotes
>>>>> to warn users of the potential of exposing UB and let me repeat that
>>>>> here for more exposure:
>>>>>
>>>>> Optimization of floating-point casts is improved. This may cause
>>>>> surprising
>>>>> results for code that is relying on undefined behavior. Code
>>>>> sanitizers can
>>>>> be used to detect affected patterns such as this:
>>>>>
>>>>> int main() {
>>>>> float x = 4294967296.0f;
>>>>> x = (float)((int)x);
>>>>> printf("junk in the ftrunc: %f\n", x);
>>>>> return 0;
>>>>> }
>>>>>
>>>>> $ clang -O1 ftrunc.c -fsanitize=undefined ; ./a.out
>>>>> ftrunc.c:5:15: runtime error: 4.29497e+09 is outside the range of
>>>>> representable values of type 'int'
>>>>> junk in the ftrunc: 0.000000
>>>>>
>>>>>
>>>>> Original commit message:
>>>>>
>>>>> fptosi / fptoui round towards zero, and that's the same behavior as
>>>>> ISD::FTRUNC,
>>>>> so replace a pair of casts with the equivalent node. We don't have to
>>>>> account for
>>>>> special cases (NaN, INF) because out-of-range casts are undefined.
>>>>>
>>>>> Differential Revision: https://reviews.llvm.org/D44909
>>>>>
>>>>> Added:
>>>>> llvm/trunk/test/CodeGen/ARM/ftrunc.ll
>>>>> - copied unchanged from r329919,
>>>>> llvm/trunk/test/CodeGen/ARM/ftrunc.ll
>>>>> Modified:
>>>>> llvm/trunk/docs/ReleaseNotes.rst
>>>>> llvm/trunk/include/llvm/CodeGen/ISDOpcodes.h
>>>>> llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
>>>>> llvm/trunk/test/CodeGen/AArch64/ftrunc.ll
>>>>> llvm/trunk/test/CodeGen/PowerPC/fp-int128-fp-combine.ll
>>>>> llvm/trunk/test/CodeGen/PowerPC/fp-to-int-to-fp.ll
>>>>> llvm/trunk/test/CodeGen/PowerPC/ftrunc-vec.ll
>>>>> llvm/trunk/test/CodeGen/PowerPC/no-extra-fp-conv-ldst.ll
>>>>> llvm/trunk/test/CodeGen/X86/2011-10-19-widen_vselect.ll
>>>>> llvm/trunk/test/CodeGen/X86/ftrunc.ll
>>>>>
>>>>> Modified: llvm/trunk/docs/ReleaseNotes.rst
>>>>> URL:
>>>>> http://llvm.org/viewvc/llvm-project/llvm/trunk/docs/ReleaseNotes.rst?rev=330437&r1=330436&r2=330437&view=diff
>>>>>
>>>>> ==============================================================================
>>>>> --- llvm/trunk/docs/ReleaseNotes.rst (original)
>>>>> +++ llvm/trunk/docs/ReleaseNotes.rst Fri Apr 20 08:07:55 2018
>>>>> @@ -61,6 +61,26 @@ Non-comprehensive list of changes in thi
>>>>> * The optimization flag to merge constants (-fmerge-all-constants) is
>>>>> no longer
>>>>> applied by default.
>>>>>
>>>>> +* Optimization of floating-point casts is improved. This may cause
>>>>> surprising
>>>>> + results for code that is relying on undefined behavior. Code
>>>>> sanitizers can
>>>>> + be used to detect affected patterns such as this:
>>>>> +
>>>>> +.. code-block:: c
>>>>> +
>>>>> + int main() {
>>>>> + float x = 4294967296.0f;
>>>>> + x = (float)((int)x);
>>>>> + printf("junk in the ftrunc: %f\n", x);
>>>>> + return 0;
>>>>> + }
>>>>> +
>>>>> +.. code-block:: bash
>>>>> +
>>>>> + clang -O1 ftrunc.c -fsanitize=undefined ; ./a.out
>>>>> + ftrunc.c:5:15: runtime error: 4.29497e+09 is outside the range of
>>>>> representable values of type 'int'
>>>>> + junk in the ftrunc: 0.000000
>>>>> +
>>>>> +
>>>>> * Note..
>>>>>
>>>>> .. NOTE
>>>>>
>>>>> Modified: llvm/trunk/include/llvm/CodeGen/ISDOpcodes.h
>>>>> URL:
>>>>> http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/CodeGen/ISDOpcodes.h?rev=330437&r1=330436&r2=330437&view=diff
>>>>>
>>>>> ==============================================================================
>>>>> --- llvm/trunk/include/llvm/CodeGen/ISDOpcodes.h (original)
>>>>> +++ llvm/trunk/include/llvm/CodeGen/ISDOpcodes.h Fri Apr 20 08:07:55
>>>>> 2018
>>>>> @@ -495,7 +495,8 @@ namespace ISD {
>>>>> ZERO_EXTEND_VECTOR_INREG,
>>>>>
>>>>> /// FP_TO_[US]INT - Convert a floating point value to a signed or
>>>>> unsigned
>>>>> - /// integer.
>>>>> + /// integer. These have the same semantics as fptosi and fptoui
>>>>> in IR. If
>>>>> + /// the FP value cannot fit in the integer type, the results are
>>>>> undefined.
>>>>> FP_TO_SINT,
>>>>> FP_TO_UINT,
>>>>>
>>>>>
>>>>> Modified: llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
>>>>> URL:
>>>>> http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp?rev=330437&r1=330436&r2=330437&view=diff
>>>>>
>>>>> ==============================================================================
>>>>> --- llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp (original)
>>>>> +++ llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp Fri Apr 20
>>>>> 08:07:55 2018
>>>>> @@ -10890,6 +10890,15 @@ SDValue DAGCombiner::visitSINT_TO_FP(SDN
>>>>> }
>>>>> }
>>>>>
>>>>> + // fptosi rounds towards zero, so converting from FP to integer and
>>>>> back is
>>>>> + // the same as an 'ftrunc': sitofp (fptosi X) --> ftrunc X
>>>>> + // We only do this if the target has legal ftrunc, otherwise we'd
>>>>> likely be
>>>>> + // replacing casts with a libcall.
>>>>> + if (N0.getOpcode() == ISD::FP_TO_SINT &&
>>>>> + N0.getOperand(0).getValueType() == VT &&
>>>>> + TLI.isOperationLegal(ISD::FTRUNC, VT))
>>>>> + return DAG.getNode(ISD::FTRUNC, SDLoc(N), VT, N0.getOperand(0));
>>>>> +
>>>>> return SDValue();
>>>>> }
>>>>>
>>>>> @@ -10929,6 +10938,15 @@ SDValue DAGCombiner::visitUINT_TO_FP(SDN
>>>>> }
>>>>> }
>>>>>
>>>>> + // fptoui rounds towards zero, so converting from FP to integer and
>>>>> back is
>>>>> + // the same as an 'ftrunc': uitofp (fptoui X) --> ftrunc X
>>>>> + // We only do this if the target has legal ftrunc, otherwise we'd
>>>>> likely be
>>>>> + // replacing casts with a libcall.
>>>>> + if (N0.getOpcode() == ISD::FP_TO_UINT &&
>>>>> + N0.getOperand(0).getValueType() == VT &&
>>>>> + TLI.isOperationLegal(ISD::FTRUNC, VT))
>>>>> + return DAG.getNode(ISD::FTRUNC, SDLoc(N), VT, N0.getOperand(0));
>>>>> +
>>>>> return SDValue();
>>>>> }
>>>>>
>>>>>
>>>>> Modified: llvm/trunk/test/CodeGen/AArch64/ftrunc.ll
>>>>> URL:
>>>>> http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/AArch64/ftrunc.ll?rev=330437&r1=330436&r2=330437&view=diff
>>>>>
>>>>> ==============================================================================
>>>>> --- llvm/trunk/test/CodeGen/AArch64/ftrunc.ll (original)
>>>>> +++ llvm/trunk/test/CodeGen/AArch64/ftrunc.ll Fri Apr 20 08:07:55 2018
>>>>> @@ -4,8 +4,7 @@
>>>>> define float @trunc_unsigned_f32(float %x) {
>>>>> ; CHECK-LABEL: trunc_unsigned_f32:
>>>>> ; CHECK: // %bb.0:
>>>>> -; CHECK-NEXT: fcvtzu w8, s0
>>>>> -; CHECK-NEXT: ucvtf s0, w8
>>>>> +; CHECK-NEXT: frintz s0, s0
>>>>> ; CHECK-NEXT: ret
>>>>> %i = fptoui float %x to i32
>>>>> %r = uitofp i32 %i to float
>>>>> @@ -15,8 +14,7 @@ define float @trunc_unsigned_f32(float %
>>>>> define double @trunc_unsigned_f64(double %x) {
>>>>> ; CHECK-LABEL: trunc_unsigned_f64:
>>>>> ; CHECK: // %bb.0:
>>>>> -; CHECK-NEXT: fcvtzu x8, d0
>>>>> -; CHECK-NEXT: ucvtf d0, x8
>>>>> +; CHECK-NEXT: frintz d0, d0
>>>>> ; CHECK-NEXT: ret
>>>>> %i = fptoui double %x to i64
>>>>> %r = uitofp i64 %i to double
>>>>> @@ -26,8 +24,7 @@ define double @trunc_unsigned_f64(double
>>>>> define float @trunc_signed_f32(float %x) {
>>>>> ; CHECK-LABEL: trunc_signed_f32:
>>>>> ; CHECK: // %bb.0:
>>>>> -; CHECK-NEXT: fcvtzs w8, s0
>>>>> -; CHECK-NEXT: scvtf s0, w8
>>>>> +; CHECK-NEXT: frintz s0, s0
>>>>> ; CHECK-NEXT: ret
>>>>> %i = fptosi float %x to i32
>>>>> %r = sitofp i32 %i to float
>>>>> @@ -37,8 +34,7 @@ define float @trunc_signed_f32(float %x)
>>>>> define double @trunc_signed_f64(double %x) {
>>>>> ; CHECK-LABEL: trunc_signed_f64:
>>>>> ; CHECK: // %bb.0:
>>>>> -; CHECK-NEXT: fcvtzs x8, d0
>>>>> -; CHECK-NEXT: scvtf d0, x8
>>>>> +; CHECK-NEXT: frintz d0, d0
>>>>> ; CHECK-NEXT: ret
>>>>> %i = fptosi double %x to i64
>>>>> %r = sitofp i64 %i to double
>>>>>
>>>>> Modified: llvm/trunk/test/CodeGen/PowerPC/fp-int128-fp-combine.ll
>>>>> URL:
>>>>> http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/PowerPC/fp-int128-fp-combine.ll?rev=330437&r1=330436&r2=330437&view=diff
>>>>>
>>>>> ==============================================================================
>>>>> --- llvm/trunk/test/CodeGen/PowerPC/fp-int128-fp-combine.ll (original)
>>>>> +++ llvm/trunk/test/CodeGen/PowerPC/fp-int128-fp-combine.ll Fri Apr 20
>>>>> 08:07:55 2018
>>>>> @@ -5,18 +5,7 @@
>>>>> define float @f_i128_f(float %v) {
>>>>> ; CHECK-LABEL: f_i128_f:
>>>>> ; CHECK: # %bb.0: # %entry
>>>>> -; CHECK-NEXT: mflr 0
>>>>> -; CHECK-NEXT: std 0, 16(1)
>>>>> -; CHECK-NEXT: stdu 1, -32(1)
>>>>> -; CHECK-NEXT: .cfi_def_cfa_offset 32
>>>>> -; CHECK-NEXT: .cfi_offset lr, 16
>>>>> -; CHECK-NEXT: bl __fixsfti
>>>>> -; CHECK-NEXT: nop
>>>>> -; CHECK-NEXT: bl __floattisf
>>>>> -; CHECK-NEXT: nop
>>>>> -; CHECK-NEXT: addi 1, 1, 32
>>>>> -; CHECK-NEXT: ld 0, 16(1)
>>>>> -; CHECK-NEXT: mtlr 0
>>>>> +; CHECK-NEXT: friz 1, 1
>>>>> ; CHECK-NEXT: blr
>>>>> entry:
>>>>> %a = fptosi float %v to i128
>>>>>
>>>>> Modified: llvm/trunk/test/CodeGen/PowerPC/fp-to-int-to-fp.ll
>>>>> URL:
>>>>> http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/PowerPC/fp-to-int-to-fp.ll?rev=330437&r1=330436&r2=330437&view=diff
>>>>>
>>>>> ==============================================================================
>>>>> --- llvm/trunk/test/CodeGen/PowerPC/fp-to-int-to-fp.ll (original)
>>>>> +++ llvm/trunk/test/CodeGen/PowerPC/fp-to-int-to-fp.ll Fri Apr 20
>>>>> 08:07:55 2018
>>>>> @@ -11,8 +11,7 @@ entry:
>>>>> ret float %conv1
>>>>>
>>>>> ; FPCVT-LABEL: @fool
>>>>> -; FPCVT: fctidz [[REG1:[0-9]+]], 1
>>>>> -; FPCVT: fcfids 1, [[REG1]]
>>>>> +; FPCVT: friz 1, 1
>>>>> ; FPCVT: blr
>>>>>
>>>>> ; PPC64-LABEL: @fool
>>>>> @@ -30,8 +29,7 @@ entry:
>>>>> ret double %conv1
>>>>>
>>>>> ; FPCVT-LABEL: @foodl
>>>>> -; FPCVT: fctidz [[REG1:[0-9]+]], 1
>>>>> -; FPCVT: fcfid 1, [[REG1]]
>>>>> +; FPCVT: friz 1, 1
>>>>> ; FPCVT: blr
>>>>>
>>>>> ; PPC64-LABEL: @foodl
>>>>> @@ -48,8 +46,7 @@ entry:
>>>>> ret float %conv1
>>>>>
>>>>> ; FPCVT-LABEL: @fooul
>>>>> -; FPCVT: fctiduz [[REG1:[0-9]+]], 1
>>>>> -; FPCVT: fcfidus 1, [[REG1]]
>>>>> +; FPCVT: friz 1, 1
>>>>> ; FPCVT: blr
>>>>> }
>>>>>
>>>>> @@ -61,8 +58,7 @@ entry:
>>>>> ret double %conv1
>>>>>
>>>>> ; FPCVT-LABEL: @fooudl
>>>>> -; FPCVT: fctiduz [[REG1:[0-9]+]], 1
>>>>> -; FPCVT: fcfidu 1, [[REG1]]
>>>>> +; FPCVT: friz 1, 1
>>>>> ; FPCVT: blr
>>>>> }
>>>>>
>>>>>
>>>>> Modified: llvm/trunk/test/CodeGen/PowerPC/ftrunc-vec.ll
>>>>> URL:
>>>>> http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/PowerPC/ftrunc-vec.ll?rev=330437&r1=330436&r2=330437&view=diff
>>>>>
>>>>> ==============================================================================
>>>>> --- llvm/trunk/test/CodeGen/PowerPC/ftrunc-vec.ll (original)
>>>>> +++ llvm/trunk/test/CodeGen/PowerPC/ftrunc-vec.ll Fri Apr 20 08:07:55
>>>>> 2018
>>>>> @@ -4,8 +4,7 @@
>>>>> define <4 x float> @truncf32(<4 x float> %a) {
>>>>> ; CHECK-LABEL: truncf32:
>>>>> ; CHECK: # %bb.0:
>>>>> -; CHECK-NEXT: xvcvspsxws 0, 34
>>>>> -; CHECK-NEXT: xvcvsxwsp 34, 0
>>>>> +; CHECK-NEXT: xvrspiz 34, 34
>>>>> ; CHECK-NEXT: blr
>>>>> %t0 = fptosi <4 x float> %a to <4 x i32>
>>>>> %t1 = sitofp <4 x i32> %t0 to <4 x float>
>>>>> @@ -15,8 +14,7 @@ define <4 x float> @truncf32(<4 x float>
>>>>> define <2 x double> @truncf64(<2 x double> %a) {
>>>>> ; CHECK-LABEL: truncf64:
>>>>> ; CHECK: # %bb.0:
>>>>> -; CHECK-NEXT: xvcvdpsxds 34, 34
>>>>> -; CHECK-NEXT: xvcvsxddp 34, 34
>>>>> +; CHECK-NEXT: xvrdpiz 34, 34
>>>>> ; CHECK-NEXT: blr
>>>>> %t0 = fptosi <2 x double> %a to <2 x i64>
>>>>> %t1 = sitofp <2 x i64> %t0 to <2 x double>
>>>>> @@ -26,8 +24,7 @@ define <2 x double> @truncf64(<2 x doubl
>>>>> define <4 x float> @truncf32u(<4 x float> %a) {
>>>>> ; CHECK-LABEL: truncf32u:
>>>>> ; CHECK: # %bb.0:
>>>>> -; CHECK-NEXT: xvcvspuxws 0, 34
>>>>> -; CHECK-NEXT: xvcvuxwsp 34, 0
>>>>> +; CHECK-NEXT: xvrspiz 34, 34
>>>>> ; CHECK-NEXT: blr
>>>>> %t0 = fptoui <4 x float> %a to <4 x i32>
>>>>> %t1 = uitofp <4 x i32> %t0 to <4 x float>
>>>>> @@ -37,8 +34,7 @@ define <4 x float> @truncf32u(<4 x float
>>>>> define <2 x double> @truncf64u(<2 x double> %a) {
>>>>> ; CHECK-LABEL: truncf64u:
>>>>> ; CHECK: # %bb.0:
>>>>> -; CHECK-NEXT: xvcvdpuxds 34, 34
>>>>> -; CHECK-NEXT: xvcvuxddp 34, 34
>>>>> +; CHECK-NEXT: xvrdpiz 34, 34
>>>>> ; CHECK-NEXT: blr
>>>>> %t0 = fptoui <2 x double> %a to <2 x i64>
>>>>> %t1 = uitofp <2 x i64> %t0 to <2 x double>
>>>>>
>>>>> Modified: llvm/trunk/test/CodeGen/PowerPC/no-extra-fp-conv-ldst.ll
>>>>> URL:
>>>>> http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/PowerPC/no-extra-fp-conv-ldst.ll?rev=330437&r1=330436&r2=330437&view=diff
>>>>>
>>>>> ==============================================================================
>>>>> --- llvm/trunk/test/CodeGen/PowerPC/no-extra-fp-conv-ldst.ll (original)
>>>>> +++ llvm/trunk/test/CodeGen/PowerPC/no-extra-fp-conv-ldst.ll Fri Apr
>>>>> 20 08:07:55 2018
>>>>> @@ -36,11 +36,7 @@ entry:
>>>>> ret float %conv1
>>>>>
>>>>> ; CHECK-LABEL: @foo
>>>>> -; CHECK-DAG: fctiwz [[REG2:[0-9]+]], 1
>>>>> -; CHECK-DAG: addi [[REG1:[0-9]+]], 1,
>>>>> -; CHECK: stfiwx [[REG2]], 0, [[REG1]]
>>>>> -; CHECK: lfiwax [[REG3:[0-9]+]], 0, [[REG1]]
>>>>> -; CHECK: fcfids 1, [[REG3]]
>>>>> +; CHECK: friz 1, 1
>>>>> ; CHECK: blr
>>>>> }
>>>>>
>>>>> @@ -52,11 +48,7 @@ entry:
>>>>> ret double %conv1
>>>>>
>>>>> ; CHECK-LABEL: @food
>>>>> -; CHECK-DAG: fctiwz [[REG2:[0-9]+]], 1
>>>>> -; CHECK-DAG: addi [[REG1:[0-9]+]], 1,
>>>>> -; CHECK: stfiwx [[REG2]], 0, [[REG1]]
>>>>> -; CHECK: lfiwax [[REG3:[0-9]+]], 0, [[REG1]]
>>>>> -; CHECK: fcfid 1, [[REG3]]
>>>>> +; CHECK: friz 1, 1
>>>>> ; CHECK: blr
>>>>> }
>>>>>
>>>>> @@ -68,11 +60,7 @@ entry:
>>>>> ret float %conv1
>>>>>
>>>>> ; CHECK-LABEL: @foou
>>>>> -; CHECK-DAG: fctiwuz [[REG2:[0-9]+]], 1
>>>>> -; CHECK-DAG: addi [[REG1:[0-9]+]], 1,
>>>>> -; CHECK: stfiwx [[REG2]], 0, [[REG1]]
>>>>> -; CHECK: lfiwzx [[REG3:[0-9]+]], 0, [[REG1]]
>>>>> -; CHECK: fcfidus 1, [[REG3]]
>>>>> +; CHECK: friz 1, 1
>>>>> ; CHECK: blr
>>>>> }
>>>>>
>>>>> @@ -84,11 +72,7 @@ entry:
>>>>> ret double %conv1
>>>>>
>>>>> ; CHECK-LABEL: @fooud
>>>>> -; CHECK-DAG: fctiwuz [[REG2:[0-9]+]], 1
>>>>> -; CHECK-DAG: addi [[REG1:[0-9]+]], 1,
>>>>> -; CHECK: stfiwx [[REG2]], 0, [[REG1]]
>>>>> -; CHECK: lfiwzx [[REG3:[0-9]+]], 0, [[REG1]]
>>>>> -; CHECK: fcfidu 1, [[REG3]]
>>>>> +; CHECK: friz 1, 1
>>>>> ; CHECK: blr
>>>>> }
>>>>>
>>>>>
>>>>> Modified: llvm/trunk/test/CodeGen/X86/2011-10-19-widen_vselect.ll
>>>>> URL:
>>>>> http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/X86/2011-10-19-widen_vselect.ll?rev=330437&r1=330436&r2=330437&view=diff
>>>>>
>>>>> ==============================================================================
>>>>> --- llvm/trunk/test/CodeGen/X86/2011-10-19-widen_vselect.ll (original)
>>>>> +++ llvm/trunk/test/CodeGen/X86/2011-10-19-widen_vselect.ll Fri Apr 20
>>>>> 08:07:55 2018
>>>>> @@ -71,8 +71,7 @@ define void @full_test() {
>>>>> ; X32-NEXT: subl $60, %esp
>>>>> ; X32-NEXT: .cfi_def_cfa_offset 64
>>>>> ; X32-NEXT: movsd {{.*#+}} xmm2 = mem[0],zero
>>>>> -; X32-NEXT: cvttps2dq %xmm2, %xmm0
>>>>> -; X32-NEXT: cvtdq2ps %xmm0, %xmm1
>>>>> +; X32-NEXT: roundps $11, %xmm2, %xmm1
>>>>> ; X32-NEXT: xorps %xmm0, %xmm0
>>>>> ; X32-NEXT: cmpltps %xmm2, %xmm0
>>>>> ; X32-NEXT: movaps {{.*#+}} xmm3 = <1,1,u,u>
>>>>> @@ -93,8 +92,7 @@ define void @full_test() {
>>>>> ; X64-LABEL: full_test:
>>>>> ; X64: # %bb.0: # %entry
>>>>> ; X64-NEXT: movsd {{.*#+}} xmm2 = mem[0],zero
>>>>> -; X64-NEXT: cvttps2dq %xmm2, %xmm0
>>>>> -; X64-NEXT: cvtdq2ps %xmm0, %xmm1
>>>>> +; X64-NEXT: roundps $11, %xmm2, %xmm1
>>>>> ; X64-NEXT: xorps %xmm0, %xmm0
>>>>> ; X64-NEXT: cmpltps %xmm2, %xmm0
>>>>> ; X64-NEXT: movaps {{.*#+}} xmm3 = <1,1,u,u>
>>>>>
>>>>> Modified: llvm/trunk/test/CodeGen/X86/ftrunc.ll
>>>>> URL:
>>>>> http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/X86/ftrunc.ll?rev=330437&r1=330436&r2=330437&view=diff
>>>>>
>>>>> ==============================================================================
>>>>> --- llvm/trunk/test/CodeGen/X86/ftrunc.ll (original)
>>>>> +++ llvm/trunk/test/CodeGen/X86/ftrunc.ll Fri Apr 20 08:07:55 2018
>>>>> @@ -14,17 +14,12 @@ define float @trunc_unsigned_f32(float %
>>>>> ;
>>>>> ; SSE41-LABEL: trunc_unsigned_f32:
>>>>> ; SSE41: # %bb.0:
>>>>> -; SSE41-NEXT: cvttss2si %xmm0, %rax
>>>>> -; SSE41-NEXT: movl %eax, %eax
>>>>> -; SSE41-NEXT: xorps %xmm0, %xmm0
>>>>> -; SSE41-NEXT: cvtsi2ssq %rax, %xmm0
>>>>> +; SSE41-NEXT: roundss $11, %xmm0, %xmm0
>>>>> ; SSE41-NEXT: retq
>>>>> ;
>>>>> ; AVX1-LABEL: trunc_unsigned_f32:
>>>>> ; AVX1: # %bb.0:
>>>>> -; AVX1-NEXT: vcvttss2si %xmm0, %rax
>>>>> -; AVX1-NEXT: movl %eax, %eax
>>>>> -; AVX1-NEXT: vcvtsi2ssq %rax, %xmm1, %xmm0
>>>>> +; AVX1-NEXT: vroundss $11, %xmm0, %xmm0, %xmm0
>>>>> ; AVX1-NEXT: retq
>>>>> %i = fptoui float %x to i32
>>>>> %r = uitofp i32 %i to float
>>>>> @@ -52,35 +47,12 @@ define double @trunc_unsigned_f64(double
>>>>> ;
>>>>> ; SSE41-LABEL: trunc_unsigned_f64:
>>>>> ; SSE41: # %bb.0:
>>>>> -; SSE41-NEXT: movsd {{.*#+}} xmm1 = mem[0],zero
>>>>> -; SSE41-NEXT: movapd %xmm0, %xmm2
>>>>> -; SSE41-NEXT: subsd %xmm1, %xmm2
>>>>> -; SSE41-NEXT: cvttsd2si %xmm2, %rax
>>>>> -; SSE41-NEXT: movabsq $-9223372036854775808, %rcx # imm =
>>>>> 0x8000000000000000
>>>>> -; SSE41-NEXT: xorq %rax, %rcx
>>>>> -; SSE41-NEXT: cvttsd2si %xmm0, %rax
>>>>> -; SSE41-NEXT: ucomisd %xmm1, %xmm0
>>>>> -; SSE41-NEXT: cmovaeq %rcx, %rax
>>>>> -; SSE41-NEXT: movq %rax, %xmm0
>>>>> -; SSE41-NEXT: punpckldq {{.*#+}} xmm0 =
>>>>> xmm0[0],mem[0],xmm0[1],mem[1]
>>>>> -; SSE41-NEXT: subpd {{.*}}(%rip), %xmm0
>>>>> -; SSE41-NEXT: haddpd %xmm0, %xmm0
>>>>> +; SSE41-NEXT: roundsd $11, %xmm0, %xmm0
>>>>> ; SSE41-NEXT: retq
>>>>> ;
>>>>> ; AVX1-LABEL: trunc_unsigned_f64:
>>>>> ; AVX1: # %bb.0:
>>>>> -; AVX1-NEXT: vmovsd {{.*#+}} xmm1 = mem[0],zero
>>>>> -; AVX1-NEXT: vsubsd %xmm1, %xmm0, %xmm2
>>>>> -; AVX1-NEXT: vcvttsd2si %xmm2, %rax
>>>>> -; AVX1-NEXT: movabsq $-9223372036854775808, %rcx # imm =
>>>>> 0x8000000000000000
>>>>> -; AVX1-NEXT: xorq %rax, %rcx
>>>>> -; AVX1-NEXT: vcvttsd2si %xmm0, %rax
>>>>> -; AVX1-NEXT: vucomisd %xmm1, %xmm0
>>>>> -; AVX1-NEXT: cmovaeq %rcx, %rax
>>>>> -; AVX1-NEXT: vmovq %rax, %xmm0
>>>>> -; AVX1-NEXT: vpunpckldq {{.*#+}} xmm0 =
>>>>> xmm0[0],mem[0],xmm0[1],mem[1]
>>>>> -; AVX1-NEXT: vsubpd {{.*}}(%rip), %xmm0, %xmm0
>>>>> -; AVX1-NEXT: vhaddpd %xmm0, %xmm0, %xmm0
>>>>> +; AVX1-NEXT: vroundsd $11, %xmm0, %xmm0, %xmm0
>>>>> ; AVX1-NEXT: retq
>>>>> %i = fptoui double %x to i64
>>>>> %r = uitofp i64 %i to double
>>>>> @@ -118,45 +90,12 @@ define <4 x float> @trunc_unsigned_v4f32
>>>>> ;
>>>>> ; SSE41-LABEL: trunc_unsigned_v4f32:
>>>>> ; SSE41: # %bb.0:
>>>>> -; SSE41-NEXT: movshdup {{.*#+}} xmm1 = xmm0[1,1,3,3]
>>>>> -; SSE41-NEXT: cvttss2si %xmm1, %rax
>>>>> -; SSE41-NEXT: cvttss2si %xmm0, %rcx
>>>>> -; SSE41-NEXT: movd %ecx, %xmm1
>>>>> -; SSE41-NEXT: pinsrd $1, %eax, %xmm1
>>>>> -; SSE41-NEXT: movaps %xmm0, %xmm2
>>>>> -; SSE41-NEXT: movhlps {{.*#+}} xmm2 = xmm0[1],xmm2[1]
>>>>> -; SSE41-NEXT: cvttss2si %xmm2, %rax
>>>>> -; SSE41-NEXT: pinsrd $2, %eax, %xmm1
>>>>> -; SSE41-NEXT: shufps {{.*#+}} xmm0 = xmm0[3,1,2,3]
>>>>> -; SSE41-NEXT: cvttss2si %xmm0, %rax
>>>>> -; SSE41-NEXT: pinsrd $3, %eax, %xmm1
>>>>> -; SSE41-NEXT: movdqa {{.*#+}} xmm0 =
>>>>> [1258291200,1258291200,1258291200,1258291200]
>>>>> -; SSE41-NEXT: pblendw {{.*#+}} xmm0 =
>>>>> xmm1[0],xmm0[1],xmm1[2],xmm0[3],xmm1[4],xmm0[5],xmm1[6],xmm0[7]
>>>>> -; SSE41-NEXT: psrld $16, %xmm1
>>>>> -; SSE41-NEXT: pblendw {{.*#+}} xmm1 =
>>>>> xmm1[0],mem[1],xmm1[2],mem[3],xmm1[4],mem[5],xmm1[6],mem[7]
>>>>> -; SSE41-NEXT: addps {{.*}}(%rip), %xmm1
>>>>> -; SSE41-NEXT: addps %xmm0, %xmm1
>>>>> -; SSE41-NEXT: movaps %xmm1, %xmm0
>>>>> +; SSE41-NEXT: roundps $11, %xmm0, %xmm0
>>>>> ; SSE41-NEXT: retq
>>>>> ;
>>>>> ; AVX1-LABEL: trunc_unsigned_v4f32:
>>>>> ; AVX1: # %bb.0:
>>>>> -; AVX1-NEXT: vmovshdup {{.*#+}} xmm1 = xmm0[1,1,3,3]
>>>>> -; AVX1-NEXT: vcvttss2si %xmm1, %rax
>>>>> -; AVX1-NEXT: vcvttss2si %xmm0, %rcx
>>>>> -; AVX1-NEXT: vmovd %ecx, %xmm1
>>>>> -; AVX1-NEXT: vpinsrd $1, %eax, %xmm1, %xmm1
>>>>> -; AVX1-NEXT: vpermilpd {{.*#+}} xmm2 = xmm0[1,0]
>>>>> -; AVX1-NEXT: vcvttss2si %xmm2, %rax
>>>>> -; AVX1-NEXT: vpinsrd $2, %eax, %xmm1, %xmm1
>>>>> -; AVX1-NEXT: vpermilps {{.*#+}} xmm0 = xmm0[3,1,2,3]
>>>>> -; AVX1-NEXT: vcvttss2si %xmm0, %rax
>>>>> -; AVX1-NEXT: vpinsrd $3, %eax, %xmm1, %xmm0
>>>>> -; AVX1-NEXT: vpblendw {{.*#+}} xmm1 =
>>>>> xmm0[0],mem[1],xmm0[2],mem[3],xmm0[4],mem[5],xmm0[6],mem[7]
>>>>> -; AVX1-NEXT: vpsrld $16, %xmm0, %xmm0
>>>>> -; AVX1-NEXT: vpblendw {{.*#+}} xmm0 =
>>>>> xmm0[0],mem[1],xmm0[2],mem[3],xmm0[4],mem[5],xmm0[6],mem[7]
>>>>> -; AVX1-NEXT: vaddps {{.*}}(%rip), %xmm0, %xmm0
>>>>> -; AVX1-NEXT: vaddps %xmm0, %xmm1, %xmm0
>>>>> +; AVX1-NEXT: vroundps $11, %xmm0, %xmm0
>>>>> ; AVX1-NEXT: retq
>>>>> %i = fptoui <4 x float> %x to <4 x i32>
>>>>> %r = uitofp <4 x i32> %i to <4 x float>
>>>>> @@ -201,61 +140,12 @@ define <2 x double> @trunc_unsigned_v2f6
>>>>> ;
>>>>> ; SSE41-LABEL: trunc_unsigned_v2f64:
>>>>> ; SSE41: # %bb.0:
>>>>> -; SSE41-NEXT: movaps %xmm0, %xmm1
>>>>> -; SSE41-NEXT: movhlps {{.*#+}} xmm1 = xmm0[1],xmm1[1]
>>>>> -; SSE41-NEXT: movsd {{.*#+}} xmm2 = mem[0],zero
>>>>> -; SSE41-NEXT: movaps %xmm1, %xmm3
>>>>> -; SSE41-NEXT: subsd %xmm2, %xmm3
>>>>> -; SSE41-NEXT: cvttsd2si %xmm3, %rax
>>>>> -; SSE41-NEXT: movabsq $-9223372036854775808, %rcx # imm =
>>>>> 0x8000000000000000
>>>>> -; SSE41-NEXT: xorq %rcx, %rax
>>>>> -; SSE41-NEXT: cvttsd2si %xmm1, %rdx
>>>>> -; SSE41-NEXT: ucomisd %xmm2, %xmm1
>>>>> -; SSE41-NEXT: cmovaeq %rax, %rdx
>>>>> -; SSE41-NEXT: movaps %xmm0, %xmm1
>>>>> -; SSE41-NEXT: subsd %xmm2, %xmm1
>>>>> -; SSE41-NEXT: cvttsd2si %xmm1, %rax
>>>>> -; SSE41-NEXT: xorq %rcx, %rax
>>>>> -; SSE41-NEXT: cvttsd2si %xmm0, %rcx
>>>>> -; SSE41-NEXT: ucomisd %xmm2, %xmm0
>>>>> -; SSE41-NEXT: cmovaeq %rax, %rcx
>>>>> -; SSE41-NEXT: movq %rcx, %xmm0
>>>>> -; SSE41-NEXT: movdqa {{.*#+}} xmm1 = [1127219200,1160773632,0,0]
>>>>> -; SSE41-NEXT: punpckldq {{.*#+}} xmm0 =
>>>>> xmm0[0],xmm1[0],xmm0[1],xmm1[1]
>>>>> -; SSE41-NEXT: movapd {{.*#+}} xmm2 = [4.503600e+15,1.934281e+25]
>>>>> -; SSE41-NEXT: subpd %xmm2, %xmm0
>>>>> -; SSE41-NEXT: movq %rdx, %xmm3
>>>>> -; SSE41-NEXT: punpckldq {{.*#+}} xmm3 =
>>>>> xmm3[0],xmm1[0],xmm3[1],xmm1[1]
>>>>> -; SSE41-NEXT: subpd %xmm2, %xmm3
>>>>> -; SSE41-NEXT: haddpd %xmm3, %xmm0
>>>>> +; SSE41-NEXT: roundpd $11, %xmm0, %xmm0
>>>>> ; SSE41-NEXT: retq
>>>>> ;
>>>>> ; AVX1-LABEL: trunc_unsigned_v2f64:
>>>>> ; AVX1: # %bb.0:
>>>>> -; AVX1-NEXT: vpermilpd {{.*#+}} xmm1 = xmm0[1,0]
>>>>> -; AVX1-NEXT: vmovsd {{.*#+}} xmm2 = mem[0],zero
>>>>> -; AVX1-NEXT: vsubsd %xmm2, %xmm1, %xmm3
>>>>> -; AVX1-NEXT: vcvttsd2si %xmm3, %rax
>>>>> -; AVX1-NEXT: movabsq $-9223372036854775808, %rcx # imm =
>>>>> 0x8000000000000000
>>>>> -; AVX1-NEXT: xorq %rcx, %rax
>>>>> -; AVX1-NEXT: vcvttsd2si %xmm1, %rdx
>>>>> -; AVX1-NEXT: vucomisd %xmm2, %xmm1
>>>>> -; AVX1-NEXT: cmovaeq %rax, %rdx
>>>>> -; AVX1-NEXT: vsubsd %xmm2, %xmm0, %xmm1
>>>>> -; AVX1-NEXT: vcvttsd2si %xmm1, %rax
>>>>> -; AVX1-NEXT: xorq %rcx, %rax
>>>>> -; AVX1-NEXT: vcvttsd2si %xmm0, %rcx
>>>>> -; AVX1-NEXT: vucomisd %xmm2, %xmm0
>>>>> -; AVX1-NEXT: cmovaeq %rax, %rcx
>>>>> -; AVX1-NEXT: vmovq %rcx, %xmm0
>>>>> -; AVX1-NEXT: vmovdqa {{.*#+}} xmm1 = [1127219200,1160773632,0,0]
>>>>> -; AVX1-NEXT: vpunpckldq {{.*#+}} xmm0 =
>>>>> xmm0[0],xmm1[0],xmm0[1],xmm1[1]
>>>>> -; AVX1-NEXT: vmovapd {{.*#+}} xmm2 = [4.503600e+15,1.934281e+25]
>>>>> -; AVX1-NEXT: vsubpd %xmm2, %xmm0, %xmm0
>>>>> -; AVX1-NEXT: vmovq %rdx, %xmm3
>>>>> -; AVX1-NEXT: vpunpckldq {{.*#+}} xmm1 =
>>>>> xmm3[0],xmm1[0],xmm3[1],xmm1[1]
>>>>> -; AVX1-NEXT: vsubpd %xmm2, %xmm1, %xmm1
>>>>> -; AVX1-NEXT: vhaddpd %xmm1, %xmm0, %xmm0
>>>>> +; AVX1-NEXT: vroundpd $11, %xmm0, %xmm0
>>>>> ; AVX1-NEXT: retq
>>>>> %i = fptoui <2 x double> %x to <2 x i64>
>>>>> %r = uitofp <2 x i64> %i to <2 x double>
>>>>> @@ -327,106 +217,13 @@ define <4 x double> @trunc_unsigned_v4f6
>>>>> ;
>>>>> ; SSE41-LABEL: trunc_unsigned_v4f64:
>>>>> ; SSE41: # %bb.0:
>>>>> -; SSE41-NEXT: movaps %xmm1, %xmm3
>>>>> -; SSE41-NEXT: movhlps {{.*#+}} xmm3 = xmm1[1],xmm3[1]
>>>>> -; SSE41-NEXT: movsd {{.*#+}} xmm2 = mem[0],zero
>>>>> -; SSE41-NEXT: movaps %xmm3, %xmm4
>>>>> -; SSE41-NEXT: subsd %xmm2, %xmm4
>>>>> -; SSE41-NEXT: cvttsd2si %xmm4, %rcx
>>>>> -; SSE41-NEXT: movabsq $-9223372036854775808, %rdx # imm =
>>>>> 0x8000000000000000
>>>>> -; SSE41-NEXT: xorq %rdx, %rcx
>>>>> -; SSE41-NEXT: cvttsd2si %xmm3, %rax
>>>>> -; SSE41-NEXT: ucomisd %xmm2, %xmm3
>>>>> -; SSE41-NEXT: cmovaeq %rcx, %rax
>>>>> -; SSE41-NEXT: movaps %xmm1, %xmm3
>>>>> -; SSE41-NEXT: subsd %xmm2, %xmm3
>>>>> -; SSE41-NEXT: cvttsd2si %xmm3, %rsi
>>>>> -; SSE41-NEXT: xorq %rdx, %rsi
>>>>> -; SSE41-NEXT: cvttsd2si %xmm1, %rcx
>>>>> -; SSE41-NEXT: ucomisd %xmm2, %xmm1
>>>>> -; SSE41-NEXT: cmovaeq %rsi, %rcx
>>>>> -; SSE41-NEXT: movaps %xmm0, %xmm1
>>>>> -; SSE41-NEXT: movhlps {{.*#+}} xmm1 = xmm0[1],xmm1[1]
>>>>> -; SSE41-NEXT: movaps %xmm1, %xmm3
>>>>> -; SSE41-NEXT: subsd %xmm2, %xmm3
>>>>> -; SSE41-NEXT: cvttsd2si %xmm3, %rsi
>>>>> -; SSE41-NEXT: xorq %rdx, %rsi
>>>>> -; SSE41-NEXT: cvttsd2si %xmm1, %rdi
>>>>> -; SSE41-NEXT: ucomisd %xmm2, %xmm1
>>>>> -; SSE41-NEXT: cmovaeq %rsi, %rdi
>>>>> -; SSE41-NEXT: movaps %xmm0, %xmm1
>>>>> -; SSE41-NEXT: subsd %xmm2, %xmm1
>>>>> -; SSE41-NEXT: cvttsd2si %xmm1, %rsi
>>>>> -; SSE41-NEXT: xorq %rdx, %rsi
>>>>> -; SSE41-NEXT: cvttsd2si %xmm0, %rdx
>>>>> -; SSE41-NEXT: ucomisd %xmm2, %xmm0
>>>>> -; SSE41-NEXT: cmovaeq %rsi, %rdx
>>>>> -; SSE41-NEXT: movq %rdx, %xmm0
>>>>> -; SSE41-NEXT: movdqa {{.*#+}} xmm2 = [1127219200,1160773632,0,0]
>>>>> -; SSE41-NEXT: punpckldq {{.*#+}} xmm0 =
>>>>> xmm0[0],xmm2[0],xmm0[1],xmm2[1]
>>>>> -; SSE41-NEXT: movapd {{.*#+}} xmm3 = [4.503600e+15,1.934281e+25]
>>>>> -; SSE41-NEXT: subpd %xmm3, %xmm0
>>>>> -; SSE41-NEXT: movq %rdi, %xmm1
>>>>> -; SSE41-NEXT: punpckldq {{.*#+}} xmm1 =
>>>>> xmm1[0],xmm2[0],xmm1[1],xmm2[1]
>>>>> -; SSE41-NEXT: subpd %xmm3, %xmm1
>>>>> -; SSE41-NEXT: haddpd %xmm1, %xmm0
>>>>> -; SSE41-NEXT: movq %rcx, %xmm1
>>>>> -; SSE41-NEXT: punpckldq {{.*#+}} xmm1 =
>>>>> xmm1[0],xmm2[0],xmm1[1],xmm2[1]
>>>>> -; SSE41-NEXT: subpd %xmm3, %xmm1
>>>>> -; SSE41-NEXT: movq %rax, %xmm4
>>>>> -; SSE41-NEXT: punpckldq {{.*#+}} xmm4 =
>>>>> xmm4[0],xmm2[0],xmm4[1],xmm2[1]
>>>>> -; SSE41-NEXT: subpd %xmm3, %xmm4
>>>>> -; SSE41-NEXT: haddpd %xmm4, %xmm1
>>>>> +; SSE41-NEXT: roundpd $11, %xmm0, %xmm0
>>>>> +; SSE41-NEXT: roundpd $11, %xmm1, %xmm1
>>>>> ; SSE41-NEXT: retq
>>>>> ;
>>>>> ; AVX1-LABEL: trunc_unsigned_v4f64:
>>>>> ; AVX1: # %bb.0:
>>>>> -; AVX1-NEXT: vpermilpd {{.*#+}} xmm2 = xmm0[1,0]
>>>>> -; AVX1-NEXT: vmovsd {{.*#+}} xmm1 = mem[0],zero
>>>>> -; AVX1-NEXT: vsubsd %xmm1, %xmm2, %xmm3
>>>>> -; AVX1-NEXT: vcvttsd2si %xmm3, %rcx
>>>>> -; AVX1-NEXT: movabsq $-9223372036854775808, %rdx # imm =
>>>>> 0x8000000000000000
>>>>> -; AVX1-NEXT: xorq %rdx, %rcx
>>>>> -; AVX1-NEXT: vcvttsd2si %xmm2, %rax
>>>>> -; AVX1-NEXT: vucomisd %xmm1, %xmm2
>>>>> -; AVX1-NEXT: cmovaeq %rcx, %rax
>>>>> -; AVX1-NEXT: vsubsd %xmm1, %xmm0, %xmm2
>>>>> -; AVX1-NEXT: vcvttsd2si %xmm2, %rcx
>>>>> -; AVX1-NEXT: xorq %rdx, %rcx
>>>>> -; AVX1-NEXT: vcvttsd2si %xmm0, %rsi
>>>>> -; AVX1-NEXT: vucomisd %xmm1, %xmm0
>>>>> -; AVX1-NEXT: cmovaeq %rcx, %rsi
>>>>> -; AVX1-NEXT: vextractf128 $1, %ymm0, %xmm0
>>>>> -; AVX1-NEXT: vpermilpd {{.*#+}} xmm2 = xmm0[1,0]
>>>>> -; AVX1-NEXT: vsubsd %xmm1, %xmm2, %xmm3
>>>>> -; AVX1-NEXT: vcvttsd2si %xmm3, %rcx
>>>>> -; AVX1-NEXT: xorq %rdx, %rcx
>>>>> -; AVX1-NEXT: vcvttsd2si %xmm2, %rdi
>>>>> -; AVX1-NEXT: vucomisd %xmm1, %xmm2
>>>>> -; AVX1-NEXT: cmovaeq %rcx, %rdi
>>>>> -; AVX1-NEXT: vsubsd %xmm1, %xmm0, %xmm2
>>>>> -; AVX1-NEXT: vcvttsd2si %xmm2, %rcx
>>>>> -; AVX1-NEXT: xorq %rdx, %rcx
>>>>> -; AVX1-NEXT: vcvttsd2si %xmm0, %rdx
>>>>> -; AVX1-NEXT: vucomisd %xmm1, %xmm0
>>>>> -; AVX1-NEXT: cmovaeq %rcx, %rdx
>>>>> -; AVX1-NEXT: vmovq %rdx, %xmm0
>>>>> -; AVX1-NEXT: vmovdqa {{.*#+}} xmm1 = [1127219200,1160773632,0,0]
>>>>> -; AVX1-NEXT: vpunpckldq {{.*#+}} xmm0 =
>>>>> xmm0[0],xmm1[0],xmm0[1],xmm1[1]
>>>>> -; AVX1-NEXT: vmovapd {{.*#+}} xmm2 = [4.503600e+15,1.934281e+25]
>>>>> -; AVX1-NEXT: vsubpd %xmm2, %xmm0, %xmm0
>>>>> -; AVX1-NEXT: vmovq %rdi, %xmm3
>>>>> -; AVX1-NEXT: vpunpckldq {{.*#+}} xmm3 =
>>>>> xmm3[0],xmm1[0],xmm3[1],xmm1[1]
>>>>> -; AVX1-NEXT: vsubpd %xmm2, %xmm3, %xmm3
>>>>> -; AVX1-NEXT: vhaddpd %xmm3, %xmm0, %xmm0
>>>>> -; AVX1-NEXT: vmovq %rsi, %xmm3
>>>>> -; AVX1-NEXT: vpunpckldq {{.*#+}} xmm3 =
>>>>> xmm3[0],xmm1[0],xmm3[1],xmm1[1]
>>>>> -; AVX1-NEXT: vsubpd %xmm2, %xmm3, %xmm3
>>>>> -; AVX1-NEXT: vmovq %rax, %xmm4
>>>>> -; AVX1-NEXT: vpunpckldq {{.*#+}} xmm1 =
>>>>> xmm4[0],xmm1[0],xmm4[1],xmm1[1]
>>>>> -; AVX1-NEXT: vsubpd %xmm2, %xmm1, %xmm1
>>>>> -; AVX1-NEXT: vhaddpd %xmm1, %xmm3, %xmm1
>>>>> -; AVX1-NEXT: vinsertf128 $1, %xmm0, %ymm1, %ymm0
>>>>> +; AVX1-NEXT: vroundpd $11, %ymm0, %ymm0
>>>>> ; AVX1-NEXT: retq
>>>>> %i = fptoui <4 x double> %x to <4 x i64>
>>>>> %r = uitofp <4 x i64> %i to <4 x double>
>>>>> @@ -443,15 +240,12 @@ define float @trunc_signed_f32(float %x)
>>>>> ;
>>>>> ; SSE41-LABEL: trunc_signed_f32:
>>>>> ; SSE41: # %bb.0:
>>>>> -; SSE41-NEXT: cvttss2si %xmm0, %eax
>>>>> -; SSE41-NEXT: xorps %xmm0, %xmm0
>>>>> -; SSE41-NEXT: cvtsi2ssl %eax, %xmm0
>>>>> +; SSE41-NEXT: roundss $11, %xmm0, %xmm0
>>>>> ; SSE41-NEXT: retq
>>>>> ;
>>>>> ; AVX1-LABEL: trunc_signed_f32:
>>>>> ; AVX1: # %bb.0:
>>>>> -; AVX1-NEXT: vcvttss2si %xmm0, %eax
>>>>> -; AVX1-NEXT: vcvtsi2ssl %eax, %xmm1, %xmm0
>>>>> +; AVX1-NEXT: vroundss $11, %xmm0, %xmm0, %xmm0
>>>>> ; AVX1-NEXT: retq
>>>>> %i = fptosi float %x to i32
>>>>> %r = sitofp i32 %i to float
>>>>> @@ -468,15 +262,12 @@ define double @trunc_signed_f64(double %
>>>>> ;
>>>>> ; SSE41-LABEL: trunc_signed_f64:
>>>>> ; SSE41: # %bb.0:
>>>>> -; SSE41-NEXT: cvttsd2si %xmm0, %rax
>>>>> -; SSE41-NEXT: xorps %xmm0, %xmm0
>>>>> -; SSE41-NEXT: cvtsi2sdq %rax, %xmm0
>>>>> +; SSE41-NEXT: roundsd $11, %xmm0, %xmm0
>>>>> ; SSE41-NEXT: retq
>>>>> ;
>>>>> ; AVX1-LABEL: trunc_signed_f64:
>>>>> ; AVX1: # %bb.0:
>>>>> -; AVX1-NEXT: vcvttsd2si %xmm0, %rax
>>>>> -; AVX1-NEXT: vcvtsi2sdq %rax, %xmm1, %xmm0
>>>>> +; AVX1-NEXT: vroundsd $11, %xmm0, %xmm0, %xmm0
>>>>> ; AVX1-NEXT: retq
>>>>> %i = fptosi double %x to i64
>>>>> %r = sitofp i64 %i to double
>>>>> @@ -492,14 +283,12 @@ define <4 x float> @trunc_signed_v4f32(<
>>>>> ;
>>>>> ; SSE41-LABEL: trunc_signed_v4f32:
>>>>> ; SSE41: # %bb.0:
>>>>> -; SSE41-NEXT: cvttps2dq %xmm0, %xmm0
>>>>> -; SSE41-NEXT: cvtdq2ps %xmm0, %xmm0
>>>>> +; SSE41-NEXT: roundps $11, %xmm0, %xmm0
>>>>> ; SSE41-NEXT: retq
>>>>> ;
>>>>> ; AVX1-LABEL: trunc_signed_v4f32:
>>>>> ; AVX1: # %bb.0:
>>>>> -; AVX1-NEXT: vcvttps2dq %xmm0, %xmm0
>>>>> -; AVX1-NEXT: vcvtdq2ps %xmm0, %xmm0
>>>>> +; AVX1-NEXT: vroundps $11, %xmm0, %xmm0
>>>>> ; AVX1-NEXT: retq
>>>>> %i = fptosi <4 x float> %x to <4 x i32>
>>>>> %r = sitofp <4 x i32> %i to <4 x float>
>>>>> @@ -520,23 +309,12 @@ define <2 x double> @trunc_signed_v2f64(
>>>>> ;
>>>>> ; SSE41-LABEL: trunc_signed_v2f64:
>>>>> ; SSE41: # %bb.0:
>>>>> -; SSE41-NEXT: cvttsd2si %xmm0, %rax
>>>>> -; SSE41-NEXT: movhlps {{.*#+}} xmm0 = xmm0[1,1]
>>>>> -; SSE41-NEXT: cvttsd2si %xmm0, %rcx
>>>>> -; SSE41-NEXT: xorps %xmm0, %xmm0
>>>>> -; SSE41-NEXT: cvtsi2sdq %rax, %xmm0
>>>>> -; SSE41-NEXT: cvtsi2sdq %rcx, %xmm1
>>>>> -; SSE41-NEXT: movlhps {{.*#+}} xmm0 = xmm0[0],xmm1[0]
>>>>> +; SSE41-NEXT: roundpd $11, %xmm0, %xmm0
>>>>> ; SSE41-NEXT: retq
>>>>> ;
>>>>> ; AVX1-LABEL: trunc_signed_v2f64:
>>>>> ; AVX1: # %bb.0:
>>>>> -; AVX1-NEXT: vpermilpd {{.*#+}} xmm1 = xmm0[1,0]
>>>>> -; AVX1-NEXT: vcvttsd2si %xmm1, %rax
>>>>> -; AVX1-NEXT: vcvttsd2si %xmm0, %rcx
>>>>> -; AVX1-NEXT: vcvtsi2sdq %rcx, %xmm2, %xmm0
>>>>> -; AVX1-NEXT: vcvtsi2sdq %rax, %xmm2, %xmm1
>>>>> -; AVX1-NEXT: vmovlhps {{.*#+}} xmm0 = xmm0[0],xmm1[0]
>>>>> +; AVX1-NEXT: vroundpd $11, %xmm0, %xmm0
>>>>> ; AVX1-NEXT: retq
>>>>> %i = fptosi <2 x double> %x to <2 x i64>
>>>>> %r = sitofp <2 x i64> %i to <2 x double>
>>>>> @@ -565,39 +343,13 @@ define <4 x double> @trunc_signed_v4f64(
>>>>> ;
>>>>> ; SSE41-LABEL: trunc_signed_v4f64:
>>>>> ; SSE41: # %bb.0:
>>>>> -; SSE41-NEXT: cvttsd2si %xmm1, %rax
>>>>> -; SSE41-NEXT: movhlps {{.*#+}} xmm1 = xmm1[1,1]
>>>>> -; SSE41-NEXT: cvttsd2si %xmm1, %rcx
>>>>> -; SSE41-NEXT: cvttsd2si %xmm0, %rdx
>>>>> -; SSE41-NEXT: movhlps {{.*#+}} xmm0 = xmm0[1,1]
>>>>> -; SSE41-NEXT: cvttsd2si %xmm0, %rsi
>>>>> -; SSE41-NEXT: xorps %xmm0, %xmm0
>>>>> -; SSE41-NEXT: cvtsi2sdq %rdx, %xmm0
>>>>> -; SSE41-NEXT: xorps %xmm1, %xmm1
>>>>> -; SSE41-NEXT: cvtsi2sdq %rsi, %xmm1
>>>>> -; SSE41-NEXT: movlhps {{.*#+}} xmm0 = xmm0[0],xmm1[0]
>>>>> -; SSE41-NEXT: xorps %xmm1, %xmm1
>>>>> -; SSE41-NEXT: cvtsi2sdq %rax, %xmm1
>>>>> -; SSE41-NEXT: cvtsi2sdq %rcx, %xmm2
>>>>> -; SSE41-NEXT: movlhps {{.*#+}} xmm1 = xmm1[0],xmm2[0]
>>>>> +; SSE41-NEXT: roundpd $11, %xmm0, %xmm0
>>>>> +; SSE41-NEXT: roundpd $11, %xmm1, %xmm1
>>>>> ; SSE41-NEXT: retq
>>>>> ;
>>>>> ; AVX1-LABEL: trunc_signed_v4f64:
>>>>> ; AVX1: # %bb.0:
>>>>> -; AVX1-NEXT: vpermilpd {{.*#+}} xmm1 = xmm0[1,0]
>>>>> -; AVX1-NEXT: vcvttsd2si %xmm1, %rax
>>>>> -; AVX1-NEXT: vcvttsd2si %xmm0, %rcx
>>>>> -; AVX1-NEXT: vextractf128 $1, %ymm0, %xmm0
>>>>> -; AVX1-NEXT: vpermilpd {{.*#+}} xmm1 = xmm0[1,0]
>>>>> -; AVX1-NEXT: vcvttsd2si %xmm1, %rdx
>>>>> -; AVX1-NEXT: vcvttsd2si %xmm0, %rsi
>>>>> -; AVX1-NEXT: vcvtsi2sdq %rsi, %xmm2, %xmm0
>>>>> -; AVX1-NEXT: vcvtsi2sdq %rdx, %xmm2, %xmm1
>>>>> -; AVX1-NEXT: vmovlhps {{.*#+}} xmm0 = xmm0[0],xmm1[0]
>>>>> -; AVX1-NEXT: vcvtsi2sdq %rcx, %xmm2, %xmm1
>>>>> -; AVX1-NEXT: vcvtsi2sdq %rax, %xmm2, %xmm2
>>>>> -; AVX1-NEXT: vmovlhps {{.*#+}} xmm1 = xmm1[0],xmm2[0]
>>>>> -; AVX1-NEXT: vinsertf128 $1, %xmm0, %ymm1, %ymm0
>>>>> +; AVX1-NEXT: vroundpd $11, %ymm0, %ymm0
>>>>> ; AVX1-NEXT: retq
>>>>> %i = fptosi <4 x double> %x to <4 x i64>
>>>>> %r = sitofp <4 x i64> %i to <4 x double>
>>>>>
>>>>>
>>>>> _______________________________________________
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>>>>> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-commits
>>>>>
>>>>
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