[llvm-branch-commits] [cfe-branch] r214823 - Merging r214801:
Bill Schmidt
wschmidt at linux.vnet.ibm.com
Tue Aug 26 16:34:25 PDT 2014
On Tue, 2014-08-26 at 15:31 -0700, Bill Wendling wrote:
> Um…What the hell is this? It’s far too late to be applying things to the branch, especially without my approval
Hi Bill,
These were committed back on August 4th. I followed your instructions
to use the merge tool, but I didn't have write-authority to the
branch-commits list so all the notifications sat in a queue waiting for
verification from a moderator. I have to assume that this finally
happened...
So anyway, nothing untoward here. These changes were from several weeks
ago.
Thanks,
Bill
>
> -bw
>
> On Aug 4, 2014, at 4:48 PM, Bill Schmidt <wschmidt at linux.vnet.ibm.com> wrote:
>
> > Author: wschmidt
> > Date: Mon Aug 4 18:48:10 2014
> > New Revision: 214823
> >
> > URL: http://llvm.org/viewvc/llvm-project?rev=214823&view=rev
> > Log:
> > Merging r214801:
> > ------------------------------------------------------------------------
> > r214801 | wschmidt | 2014-08-04 18:21:26 -0500 (Mon, 04 Aug 2014) | 19 lines
> >
> > [PPC64LE] Fix wrong IR for vec_sld and vec_vsldoi
> >
> > My original LE implementation of the vsldoi instruction, with its
> > altivec.h interfaces vec_sld and vec_vsldoi, produces incorrect
> > shufflevector operations in the LLVM IR. Correct code is generated
> > because the back end handles the incorrect shufflevector in a
> > consistent manner.
> >
> > This patch and a companion patch for LLVM correct this problem by
> > removing the fixup from altivec.h and the corresponding fixup from the
> > PowerPC back end. Several test cases are also modified to reflect the
> > now-correct LLVM IR.
> >
> > The vec_sums and vec_vsumsws interfaces in altivec.h are also fixed,
> > because they used vec_perm calls intended to be recognized as vsldoi
> > instructions. These vec_perm calls are now replaced with code that
> > more clearly shows the intent of the transformation.
> >
> >
> > ------------------------------------------------------------------------
> >
> > Modified:
> > cfe/branches/release_35/lib/Headers/altivec.h
> > cfe/branches/release_35/test/CodeGen/builtins-ppc-altivec.c
> >
> > Modified: cfe/branches/release_35/lib/Headers/altivec.h
> > URL: http://llvm.org/viewvc/llvm-project/cfe/branches/release_35/lib/Headers/altivec.h?rev=214823&r1=214822&r2=214823&view=diff
> > ==============================================================================
> > --- cfe/branches/release_35/lib/Headers/altivec.h (original)
> > +++ cfe/branches/release_35/lib/Headers/altivec.h Mon Aug 4 18:48:10 2014
> > @@ -5224,113 +5224,65 @@ vec_vslw(vector unsigned int __a, vector
> > static vector signed char __ATTRS_o_ai
> > vec_sld(vector signed char __a, vector signed char __b, unsigned char __c)
> > {
> > -#ifdef __LITTLE_ENDIAN__
> > - return vec_perm(__a, __b, (vector unsigned char)
> > - (__c, __c-1, __c-2, __c-3, __c-4, __c-5, __c-6, __c-7,
> > - __c-8, __c-9, __c-10, __c-11, __c-12, __c-13, __c-14, __c-15));
> > -#else
> > return vec_perm(__a, __b, (vector unsigned char)
> > (__c, __c+1, __c+2, __c+3, __c+4, __c+5, __c+6, __c+7,
> > __c+8, __c+9, __c+10, __c+11, __c+12, __c+13, __c+14, __c+15));
> > -#endif
> > }
> >
> > static vector unsigned char __ATTRS_o_ai
> > vec_sld(vector unsigned char __a, vector unsigned char __b, unsigned char __c)
> > {
> > -#ifdef __LITTLE_ENDIAN__
> > - return vec_perm(__a, __b, (vector unsigned char)
> > - (__c, __c-1, __c-2, __c-3, __c-4, __c-5, __c-6, __c-7,
> > - __c-8, __c-9, __c-10, __c-11, __c-12, __c-13, __c-14, __c-15));
> > -#else
> > return vec_perm(__a, __b, (vector unsigned char)
> > (__c, __c+1, __c+2, __c+3, __c+4, __c+5, __c+6, __c+7,
> > __c+8, __c+9, __c+10, __c+11, __c+12, __c+13, __c+14, __c+15));
> > -#endif
> > }
> >
> > static vector short __ATTRS_o_ai
> > vec_sld(vector short __a, vector short __b, unsigned char __c)
> > {
> > -#ifdef __LITTLE_ENDIAN__
> > - return vec_perm(__a, __b, (vector unsigned char)
> > - (__c, __c-1, __c-2, __c-3, __c-4, __c-5, __c-6, __c-7,
> > - __c-8, __c-9, __c-10, __c-11, __c-12, __c-13, __c-14, __c-15));
> > -#else
> > return vec_perm(__a, __b, (vector unsigned char)
> > (__c, __c+1, __c+2, __c+3, __c+4, __c+5, __c+6, __c+7,
> > __c+8, __c+9, __c+10, __c+11, __c+12, __c+13, __c+14, __c+15));
> > -#endif
> > }
> >
> > static vector unsigned short __ATTRS_o_ai
> > vec_sld(vector unsigned short __a, vector unsigned short __b, unsigned char __c)
> > {
> > -#ifdef __LITTLE_ENDIAN__
> > - return vec_perm(__a, __b, (vector unsigned char)
> > - (__c, __c-1, __c-2, __c-3, __c-4, __c-5, __c-6, __c-7,
> > - __c-8, __c-9, __c-10, __c-11, __c-12, __c-13, __c-14, __c-15));
> > -#else
> > return vec_perm(__a, __b, (vector unsigned char)
> > (__c, __c+1, __c+2, __c+3, __c+4, __c+5, __c+6, __c+7,
> > __c+8, __c+9, __c+10, __c+11, __c+12, __c+13, __c+14, __c+15));
> > -#endif
> > }
> >
> > static vector pixel __ATTRS_o_ai
> > vec_sld(vector pixel __a, vector pixel __b, unsigned char __c)
> > {
> > -#ifdef __LITTLE_ENDIAN__
> > - return vec_perm(__a, __b, (vector unsigned char)
> > - (__c, __c-1, __c-2, __c-3, __c-4, __c-5, __c-6, __c-7,
> > - __c-8, __c-9, __c-10, __c-11, __c-12, __c-13, __c-14, __c-15));
> > -#else
> > return vec_perm(__a, __b, (vector unsigned char)
> > (__c, __c+1, __c+2, __c+3, __c+4, __c+5, __c+6, __c+7,
> > __c+8, __c+9, __c+10, __c+11, __c+12, __c+13, __c+14, __c+15));
> > -#endif
> > }
> >
> > static vector int __ATTRS_o_ai
> > vec_sld(vector int __a, vector int __b, unsigned char __c)
> > {
> > -#ifdef __LITTLE_ENDIAN__
> > - return vec_perm(__a, __b, (vector unsigned char)
> > - (__c, __c-1, __c-2, __c-3, __c-4, __c-5, __c-6, __c-7,
> > - __c-8, __c-9, __c-10, __c-11, __c-12, __c-13, __c-14, __c-15));
> > -#else
> > return vec_perm(__a, __b, (vector unsigned char)
> > (__c, __c+1, __c+2, __c+3, __c+4, __c+5, __c+6, __c+7,
> > __c+8, __c+9, __c+10, __c+11, __c+12, __c+13, __c+14, __c+15));
> > -#endif
> > }
> >
> > static vector unsigned int __ATTRS_o_ai
> > vec_sld(vector unsigned int __a, vector unsigned int __b, unsigned char __c)
> > {
> > -#ifdef __LITTLE_ENDIAN__
> > - return vec_perm(__a, __b, (vector unsigned char)
> > - (__c, __c-1, __c-2, __c-3, __c-4, __c-5, __c-6, __c-7,
> > - __c-8, __c-9, __c-10, __c-11, __c-12, __c-13, __c-14, __c-15));
> > -#else
> > return vec_perm(__a, __b, (vector unsigned char)
> > (__c, __c+1, __c+2, __c+3, __c+4, __c+5, __c+6, __c+7,
> > __c+8, __c+9, __c+10, __c+11, __c+12, __c+13, __c+14, __c+15));
> > -#endif
> > }
> >
> > static vector float __ATTRS_o_ai
> > vec_sld(vector float __a, vector float __b, unsigned char __c)
> > {
> > -#ifdef __LITTLE_ENDIAN__
> > - return vec_perm(__a, __b, (vector unsigned char)
> > - (__c, __c-1, __c-2, __c-3, __c-4, __c-5, __c-6, __c-7,
> > - __c-8, __c-9, __c-10, __c-11, __c-12, __c-13, __c-14, __c-15));
> > -#else
> > return vec_perm(__a, __b, (vector unsigned char)
> > (__c, __c+1, __c+2, __c+3, __c+4, __c+5, __c+6, __c+7,
> > __c+8, __c+9, __c+10, __c+11, __c+12, __c+13, __c+14, __c+15));
> > -#endif
> > }
> >
> > /* vec_vsldoi */
> > @@ -5338,113 +5290,65 @@ vec_sld(vector float __a, vector float _
> > static vector signed char __ATTRS_o_ai
> > vec_vsldoi(vector signed char __a, vector signed char __b, unsigned char __c)
> > {
> > -#ifdef __LITTLE_ENDIAN__
> > - return vec_perm(__a, __b, (vector unsigned char)
> > - (__c, __c-1, __c-2, __c-3, __c-4, __c-5, __c-6, __c-7,
> > - __c-8, __c-9, __c-10, __c-11, __c-12, __c-13, __c-14, __c-15));
> > -#else
> > return vec_perm(__a, __b, (vector unsigned char)
> > (__c, __c+1, __c+2, __c+3, __c+4, __c+5, __c+6, __c+7,
> > __c+8, __c+9, __c+10, __c+11, __c+12, __c+13, __c+14, __c+15));
> > -#endif
> > }
> >
> > static vector unsigned char __ATTRS_o_ai
> > vec_vsldoi(vector unsigned char __a, vector unsigned char __b, unsigned char __c)
> > {
> > -#ifdef __LITTLE_ENDIAN__
> > - return vec_perm(__a, __b, (vector unsigned char)
> > - (__c, __c-1, __c-2, __c-3, __c-4, __c-5, __c-6, __c-7,
> > - __c-8, __c-9, __c-10, __c-11, __c-12, __c-13, __c-14, __c-15));
> > -#else
> > return vec_perm(__a, __b, (vector unsigned char)
> > (__c, __c+1, __c+2, __c+3, __c+4, __c+5, __c+6, __c+7,
> > __c+8, __c+9, __c+10, __c+11, __c+12, __c+13, __c+14, __c+15));
> > -#endif
> > }
> >
> > static vector short __ATTRS_o_ai
> > vec_vsldoi(vector short __a, vector short __b, unsigned char __c)
> > {
> > -#ifdef __LITTLE_ENDIAN__
> > - return vec_perm(__a, __b, (vector unsigned char)
> > - (__c, __c-1, __c-2, __c-3, __c-4, __c-5, __c-6, __c-7,
> > - __c-8, __c-9, __c-10, __c-11, __c-12, __c-13, __c-14, __c-15));
> > -#else
> > return vec_perm(__a, __b, (vector unsigned char)
> > (__c, __c+1, __c+2, __c+3, __c+4, __c+5, __c+6, __c+7,
> > __c+8, __c+9, __c+10, __c+11, __c+12, __c+13, __c+14, __c+15));
> > -#endif
> > }
> >
> > static vector unsigned short __ATTRS_o_ai
> > vec_vsldoi(vector unsigned short __a, vector unsigned short __b, unsigned char __c)
> > {
> > -#ifdef __LITTLE_ENDIAN__
> > - return vec_perm(__a, __b, (vector unsigned char)
> > - (__c, __c-1, __c-2, __c-3, __c-4, __c-5, __c-6, __c-7,
> > - __c-8, __c-9, __c-10, __c-11, __c-12, __c-13, __c-14, __c-15));
> > -#else
> > return vec_perm(__a, __b, (vector unsigned char)
> > (__c, __c+1, __c+2, __c+3, __c+4, __c+5, __c+6, __c+7,
> > __c+8, __c+9, __c+10, __c+11, __c+12, __c+13, __c+14, __c+15));
> > -#endif
> > }
> >
> > static vector pixel __ATTRS_o_ai
> > vec_vsldoi(vector pixel __a, vector pixel __b, unsigned char __c)
> > {
> > -#ifdef __LITTLE_ENDIAN__
> > - return vec_perm(__a, __b, (vector unsigned char)
> > - (__c, __c-1, __c-2, __c-3, __c-4, __c-5, __c-6, __c-7,
> > - __c-8, __c-9, __c-10, __c-11, __c-12, __c-13, __c-14, __c-15));
> > -#else
> > return vec_perm(__a, __b, (vector unsigned char)
> > (__c, __c+1, __c+2, __c+3, __c+4, __c+5, __c+6, __c+7,
> > __c+8, __c+9, __c+10, __c+11, __c+12, __c+13, __c+14, __c+15));
> > -#endif
> > }
> >
> > static vector int __ATTRS_o_ai
> > vec_vsldoi(vector int __a, vector int __b, unsigned char __c)
> > {
> > -#ifdef __LITTLE_ENDIAN__
> > - return vec_perm(__a, __b, (vector unsigned char)
> > - (__c, __c-1, __c-2, __c-3, __c-4, __c-5, __c-6, __c-7,
> > - __c-8, __c-9, __c-10, __c-11, __c-12, __c-13, __c-14, __c-15));
> > -#else
> > return vec_perm(__a, __b, (vector unsigned char)
> > (__c, __c+1, __c+2, __c+3, __c+4, __c+5, __c+6, __c+7,
> > __c+8, __c+9, __c+10, __c+11, __c+12, __c+13, __c+14, __c+15));
> > -#endif
> > }
> >
> > static vector unsigned int __ATTRS_o_ai
> > vec_vsldoi(vector unsigned int __a, vector unsigned int __b, unsigned char __c)
> > {
> > -#ifdef __LITTLE_ENDIAN__
> > - return vec_perm(__a, __b, (vector unsigned char)
> > - (__c, __c-1, __c-2, __c-3, __c-4, __c-5, __c-6, __c-7,
> > - __c-8, __c-9, __c-10, __c-11, __c-12, __c-13, __c-14, __c-15));
> > -#else
> > return vec_perm(__a, __b, (vector unsigned char)
> > (__c, __c+1, __c+2, __c+3, __c+4, __c+5, __c+6, __c+7,
> > __c+8, __c+9, __c+10, __c+11, __c+12, __c+13, __c+14, __c+15));
> > -#endif
> > }
> >
> > static vector float __ATTRS_o_ai
> > vec_vsldoi(vector float __a, vector float __b, unsigned char __c)
> > {
> > -#ifdef __LITTLE_ENDIAN__
> > - return vec_perm(__a, __b, (vector unsigned char)
> > - (__c, __c-1, __c-2, __c-3, __c-4, __c-5, __c-6, __c-7,
> > - __c-8, __c-9, __c-10, __c-11, __c-12, __c-13, __c-14, __c-15));
> > -#else
> > return vec_perm(__a, __b, (vector unsigned char)
> > (__c, __c+1, __c+2, __c+3, __c+4, __c+5, __c+6, __c+7,
> > __c+8, __c+9, __c+10, __c+11, __c+12, __c+13, __c+14, __c+15));
> > -#endif
> > }
> >
> > /* vec_sll */
> > @@ -8504,13 +8408,9 @@ static vector signed int __attribute__((
> > vec_sums(vector signed int __a, vector signed int __b)
> > {
> > #ifdef __LITTLE_ENDIAN__
> > - __b = (vector signed int)
> > - vec_perm(__b, __b, (vector unsigned char)
> > - (12,13,14,15,0,1,2,3,4,5,6,7,8,9,10,11));
> > + __b = (vector signed int)vec_splat(__b, 3);
> > __b = __builtin_altivec_vsumsws(__a, __b);
> > - return (vector signed int)
> > - vec_perm(__b, __b, (vector unsigned char)
> > - (4,5,6,7,8,9,10,11,12,13,14,15,0,1,2,3));
> > + return (vector signed int)(0, 0, 0, __b[0]);
> > #else
> > return __builtin_altivec_vsumsws(__a, __b);
> > #endif
> > @@ -8522,13 +8422,9 @@ static vector signed int __attribute__((
> > vec_vsumsws(vector signed int __a, vector signed int __b)
> > {
> > #ifdef __LITTLE_ENDIAN__
> > - __b = (vector signed int)
> > - vec_perm(__b, __b, (vector unsigned char)
> > - (12,13,14,15,0,1,2,3,4,5,6,7,8,9,10,11));
> > + __b = (vector signed int)vec_splat(__b, 3);
> > __b = __builtin_altivec_vsumsws(__a, __b);
> > - return (vector signed int)
> > - vec_perm(__b, __b, (vector unsigned char)
> > - (4,5,6,7,8,9,10,11,12,13,14,15,0,1,2,3));
> > + return (vector signed int)(0, 0, 0, __b[0]);
> > #else
> > return __builtin_altivec_vsumsws(__a, __b);
> > #endif
> >
> > Modified: cfe/branches/release_35/test/CodeGen/builtins-ppc-altivec.c
> > URL: http://llvm.org/viewvc/llvm-project/cfe/branches/release_35/test/CodeGen/builtins-ppc-altivec.c?rev=214823&r1=214822&r2=214823&view=diff
> > ==============================================================================
> > --- cfe/branches/release_35/test/CodeGen/builtins-ppc-altivec.c (original)
> > +++ cfe/branches/release_35/test/CodeGen/builtins-ppc-altivec.c Mon Aug 4 18:48:10 2014
> > @@ -3258,98 +3258,66 @@ void test6() {
> > /* vec_sld */
> > res_vsc = vec_sld(vsc, vsc, 0);
> > // CHECK: @llvm.ppc.altivec.vperm
> > -// CHECK-LE: sub nsw i32 {{[%_.a-z0-9]+}}, 1
> > -// CHECK-LE: sub nsw i32 {{[%_.a-z0-9]+}}, 15
> > // CHECK-LE: @llvm.ppc.altivec.vperm
> >
> > res_vuc = vec_sld(vuc, vuc, 0);
> > // CHECK: @llvm.ppc.altivec.vperm
> > -// CHECK-LE: sub nsw i32 {{[%_.a-z0-9]+}}, 1
> > -// CHECK-LE: sub nsw i32 {{[%_.a-z0-9]+}}, 15
> > // CHECK-LE: @llvm.ppc.altivec.vperm
> >
> > res_vs = vec_sld(vs, vs, 0);
> > // CHECK: @llvm.ppc.altivec.vperm
> > -// CHECK-LE: sub nsw i32 {{[%_.a-z0-9]+}}, 1
> > -// CHECK-LE: sub nsw i32 {{[%_.a-z0-9]+}}, 15
> > // CHECK-LE: @llvm.ppc.altivec.vperm
> >
> > res_vus = vec_sld(vus, vus, 0);
> > // CHECK: @llvm.ppc.altivec.vperm
> > -// CHECK-LE: sub nsw i32 {{[%_.a-z0-9]+}}, 1
> > -// CHECK-LE: sub nsw i32 {{[%_.a-z0-9]+}}, 15
> > // CHECK-LE: @llvm.ppc.altivec.vperm
> >
> > res_vp = vec_sld(vp, vp, 0);
> > // CHECK: @llvm.ppc.altivec.vperm
> > -// CHECK-LE: sub nsw i32 {{[%_.a-z0-9]+}}, 1
> > -// CHECK-LE: sub nsw i32 {{[%_.a-z0-9]+}}, 15
> > // CHECK-LE: @llvm.ppc.altivec.vperm
> >
> > res_vi = vec_sld(vi, vi, 0);
> > // CHECK: @llvm.ppc.altivec.vperm
> > -// CHECK-LE: sub nsw i32 {{[%_.a-z0-9]+}}, 1
> > -// CHECK-LE: sub nsw i32 {{[%_.a-z0-9]+}}, 15
> > // CHECK-LE: @llvm.ppc.altivec.vperm
> >
> > res_vui = vec_sld(vui, vui, 0);
> > // CHECK: @llvm.ppc.altivec.vperm
> > -// CHECK-LE: sub nsw i32 {{[%_.a-z0-9]+}}, 1
> > -// CHECK-LE: sub nsw i32 {{[%_.a-z0-9]+}}, 15
> > // CHECK-LE: @llvm.ppc.altivec.vperm
> >
> > res_vf = vec_sld(vf, vf, 0);
> > // CHECK: @llvm.ppc.altivec.vperm
> > -// CHECK-LE: sub nsw i32 {{[%_.a-z0-9]+}}, 1
> > -// CHECK-LE: sub nsw i32 {{[%_.a-z0-9]+}}, 15
> > // CHECK-LE: @llvm.ppc.altivec.vperm
> >
> > res_vsc = vec_vsldoi(vsc, vsc, 0);
> > // CHECK: @llvm.ppc.altivec.vperm
> > -// CHECK-LE: sub nsw i32 {{[%_.a-z0-9]+}}, 1
> > -// CHECK-LE: sub nsw i32 {{[%_.a-z0-9]+}}, 15
> > // CHECK-LE: @llvm.ppc.altivec.vperm
> >
> > res_vuc = vec_vsldoi(vuc, vuc, 0);
> > // CHECK: @llvm.ppc.altivec.vperm
> > -// CHECK-LE: sub nsw i32 {{[%_.a-z0-9]+}}, 1
> > -// CHECK-LE: sub nsw i32 {{[%_.a-z0-9]+}}, 15
> > // CHECK-LE: @llvm.ppc.altivec.vperm
> >
> > res_vs = vec_vsldoi(vs, vs, 0);
> > // CHECK: @llvm.ppc.altivec.vperm
> > -// CHECK-LE: sub nsw i32 {{[%_.a-z0-9]+}}, 1
> > -// CHECK-LE: sub nsw i32 {{[%_.a-z0-9]+}}, 15
> > // CHECK-LE: @llvm.ppc.altivec.vperm
> >
> > res_vus = vec_vsldoi(vus, vus, 0);
> > // CHECK: @llvm.ppc.altivec.vperm
> > -// CHECK-LE: sub nsw i32 {{[%_.a-z0-9]+}}, 1
> > -// CHECK-LE: sub nsw i32 {{[%_.a-z0-9]+}}, 15
> > // CHECK-LE: @llvm.ppc.altivec.vperm
> >
> > res_vp = vec_vsldoi(vp, vp, 0);
> > // CHECK: @llvm.ppc.altivec.vperm
> > -// CHECK-LE: sub nsw i32 {{[%_.a-z0-9]+}}, 1
> > -// CHECK-LE: sub nsw i32 {{[%_.a-z0-9]+}}, 15
> > // CHECK-LE: @llvm.ppc.altivec.vperm
> >
> > res_vi = vec_vsldoi(vi, vi, 0);
> > // CHECK: @llvm.ppc.altivec.vperm
> > -// CHECK-LE: sub nsw i32 {{[%_.a-z0-9]+}}, 1
> > -// CHECK-LE: sub nsw i32 {{[%_.a-z0-9]+}}, 15
> > // CHECK-LE: @llvm.ppc.altivec.vperm
> >
> > res_vui = vec_vsldoi(vui, vui, 0);
> > // CHECK: @llvm.ppc.altivec.vperm
> > -// CHECK-LE: sub nsw i32 {{[%_.a-z0-9]+}}, 1
> > -// CHECK-LE: sub nsw i32 {{[%_.a-z0-9]+}}, 15
> > // CHECK-LE: @llvm.ppc.altivec.vperm
> >
> > res_vf = vec_vsldoi(vf, vf, 0);
> > // CHECK: @llvm.ppc.altivec.vperm
> > -// CHECK-LE: sub nsw i32 {{[%_.a-z0-9]+}}, 1
> > -// CHECK-LE: sub nsw i32 {{[%_.a-z0-9]+}}, 15
> > // CHECK-LE: @llvm.ppc.altivec.vperm
> >
> > /* vec_sll */
> > @@ -5189,13 +5157,11 @@ void test6() {
> > // CHECK: @llvm.ppc.altivec.vsumsws
> > // CHECK-LE: @llvm.ppc.altivec.vperm
> > // CHECK-LE: @llvm.ppc.altivec.vsumsws
> > -// CHECK-LE: @llvm.ppc.altivec.vperm
> >
> > res_vi = vec_vsumsws(vi, vi);
> > // CHECK: @llvm.ppc.altivec.vsumsws
> > // CHECK-LE: @llvm.ppc.altivec.vperm
> > // CHECK-LE: @llvm.ppc.altivec.vsumsws
> > -// CHECK-LE: @llvm.ppc.altivec.vperm
> >
> > /* vec_trunc */
> > res_vf = vec_trunc(vf);
> >
> >
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