[SystemZ] Add CodeGen support for integer vector types
This the first of a series of patches to add CodeGen support exploiting
the instructions of the z13 vector facility. This patch adds support
for the native integer vector types (v16i8, v8i16, v4i32, v2i64).
When the vector facility is present, we default to the new vector ABI.
This is characterized by two major differences:
- Vector types are passed/returned in vector registers
(except for unnamed arguments of a variable-argument list function).
- Vector types are at most 8-byte aligned.
The reason for the choice of 8-byte vector alignment is that the hardware
is able to efficiently load vectors at 8-byte alignment, and the ABI only
guarantees 8-byte alignment of the stack pointer, so requiring any higher
alignment for vectors would require dynamic stack re-alignment code.
However, for compatibility with old code that may use vector types, when
*not* using the vector facility, the old alignment rules (vector types
are naturally aligned) remain in use.
These alignment rules are not only implemented at the C language level
(implemented in clang), but also at the LLVM IR level. This is done
by selecting a different DataLayout string depending on whether the
vector ABI is in effect or not.
Based on a patch by Richard Sandiford.
llvm-svn: 236521
2015-05-06 03:25:42 +08:00
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; Test vector pack.
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z13 | FileCheck %s
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; Test a canonical v16i8 pack.
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define <16 x i8> @f1(<16 x i8> %val1, <16 x i8> %val2) {
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; CHECK-LABEL: f1:
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; CHECK: vpkh %v24, %v24, %v26
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; CHECK: br %r14
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%ret = shufflevector <16 x i8> %val1, <16 x i8> %val2,
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<16 x i32> <i32 1, i32 3, i32 5, i32 7,
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i32 9, i32 11, i32 13, i32 15,
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i32 17, i32 19, i32 21, i32 23,
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i32 25, i32 27, i32 29, i32 31>
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ret <16 x i8> %ret
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}
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; Test a reversed v16i8 pack.
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define <16 x i8> @f2(<16 x i8> %val1, <16 x i8> %val2) {
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; CHECK-LABEL: f2:
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; CHECK: vpkh %v24, %v26, %v24
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; CHECK: br %r14
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%ret = shufflevector <16 x i8> %val1, <16 x i8> %val2,
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<16 x i32> <i32 17, i32 19, i32 21, i32 23,
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i32 25, i32 27, i32 29, i32 31,
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i32 1, i32 3, i32 5, i32 7,
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i32 9, i32 11, i32 13, i32 15>
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ret <16 x i8> %ret
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}
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; Test a v16i8 pack with only the first operand being used.
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define <16 x i8> @f3(<16 x i8> %val1, <16 x i8> %val2) {
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; CHECK-LABEL: f3:
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; CHECK: vpkh %v24, %v24, %v24
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; CHECK: br %r14
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%ret = shufflevector <16 x i8> %val1, <16 x i8> %val2,
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<16 x i32> <i32 1, i32 3, i32 5, i32 7,
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i32 9, i32 11, i32 13, i32 15,
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i32 1, i32 3, i32 5, i32 7,
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i32 9, i32 11, i32 13, i32 15>
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ret <16 x i8> %ret
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}
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; Test a v16i8 pack with only the second operand being used.
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; This is converted into @f3 by target-independent code.
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define <16 x i8> @f4(<16 x i8> %val1, <16 x i8> %val2) {
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; CHECK-LABEL: f4:
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; CHECK: vpkh %v24, %v26, %v26
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; CHECK: br %r14
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%ret = shufflevector <16 x i8> %val1, <16 x i8> %val2,
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<16 x i32> <i32 17, i32 19, i32 21, i32 23,
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i32 25, i32 27, i32 29, i32 31,
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i32 17, i32 19, i32 21, i32 23,
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i32 25, i32 27, i32 29, i32 31>
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ret <16 x i8> %ret
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}
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; Test a v16i8 pack with both operands being the same. This too is
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; converted into @f3 by target-independent code.
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define <16 x i8> @f5(<16 x i8> %val) {
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; CHECK-LABEL: f5:
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; CHECK: vpkh %v24, %v24, %v24
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; CHECK: br %r14
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%ret = shufflevector <16 x i8> %val, <16 x i8> %val,
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<16 x i32> <i32 1, i32 3, i32 5, i32 7,
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i32 9, i32 11, i32 13, i32 15,
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i32 17, i32 19, i32 21, i32 23,
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i32 25, i32 27, i32 29, i32 31>
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ret <16 x i8> %ret
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}
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; Test a v16i8 pack in which some of the indices are don't care.
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define <16 x i8> @f6(<16 x i8> %val1, <16 x i8> %val2) {
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; CHECK-LABEL: f6:
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; CHECK: vpkh %v24, %v24, %v26
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; CHECK: br %r14
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%ret = shufflevector <16 x i8> %val1, <16 x i8> %val2,
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<16 x i32> <i32 1, i32 undef, i32 5, i32 7,
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i32 undef, i32 11, i32 undef, i32 undef,
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i32 undef, i32 19, i32 21, i32 23,
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i32 undef, i32 27, i32 29, i32 undef>
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ret <16 x i8> %ret
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}
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; Test a v16i8 pack in which one of the operands is undefined and where
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; indices for that operand are "don't care". Target-independent code
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; converts the indices themselves into "undef"s.
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define <16 x i8> @f7(<16 x i8> %val) {
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; CHECK-LABEL: f7:
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; CHECK: vpkh %v24, %v24, %v24
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; CHECK: br %r14
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%ret = shufflevector <16 x i8> undef, <16 x i8> %val,
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<16 x i32> <i32 7, i32 1, i32 9, i32 15,
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i32 15, i32 3, i32 5, i32 1,
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i32 17, i32 19, i32 21, i32 23,
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i32 25, i32 27, i32 29, i32 31>
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ret <16 x i8> %ret
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}
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; Test a canonical v8i16 pack.
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define <8 x i16> @f8(<8 x i16> %val1, <8 x i16> %val2) {
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; CHECK-LABEL: f8:
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; CHECK: vpkf %v24, %v24, %v26
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; CHECK: br %r14
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%ret = shufflevector <8 x i16> %val1, <8 x i16> %val2,
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<8 x i32> <i32 1, i32 3, i32 5, i32 7,
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i32 9, i32 11, i32 13, i32 15>
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ret <8 x i16> %ret
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}
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; Test a reversed v8i16 pack.
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define <8 x i16> @f9(<8 x i16> %val1, <8 x i16> %val2) {
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; CHECK-LABEL: f9:
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; CHECK: vpkf %v24, %v26, %v24
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; CHECK: br %r14
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%ret = shufflevector <8 x i16> %val1, <8 x i16> %val2,
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<8 x i32> <i32 9, i32 11, i32 13, i32 15,
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i32 1, i32 3, i32 5, i32 7>
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ret <8 x i16> %ret
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}
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; Test a canonical v4i32 pack.
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define <4 x i32> @f10(<4 x i32> %val1, <4 x i32> %val2) {
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; CHECK-LABEL: f10:
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; CHECK: vpkg %v24, %v24, %v26
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; CHECK: br %r14
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%ret = shufflevector <4 x i32> %val1, <4 x i32> %val2,
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<4 x i32> <i32 1, i32 3, i32 5, i32 7>
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ret <4 x i32> %ret
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}
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; Test a reversed v4i32 pack.
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define <4 x i32> @f11(<4 x i32> %val1, <4 x i32> %val2) {
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; CHECK-LABEL: f11:
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; CHECK: vpkg %v24, %v26, %v24
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; CHECK: br %r14
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%ret = shufflevector <4 x i32> %val1, <4 x i32> %val2,
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<4 x i32> <i32 5, i32 7, i32 1, i32 3>
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ret <4 x i32> %ret
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}
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2015-05-06 03:27:45 +08:00
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; Test a canonical v4f32 pack.
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define <4 x float> @f12(<4 x float> %val1, <4 x float> %val2) {
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; CHECK-LABEL: f12:
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; CHECK: vpkg %v24, %v24, %v26
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; CHECK: br %r14
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%ret = shufflevector <4 x float> %val1, <4 x float> %val2,
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<4 x i32> <i32 1, i32 3, i32 5, i32 7>
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ret <4 x float> %ret
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}
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; Test a reversed v4f32 pack.
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define <4 x float> @f13(<4 x float> %val1, <4 x float> %val2) {
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; CHECK-LABEL: f13:
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; CHECK: vpkg %v24, %v26, %v24
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; CHECK: br %r14
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%ret = shufflevector <4 x float> %val1, <4 x float> %val2,
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<4 x i32> <i32 5, i32 7, i32 1, i32 3>
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ret <4 x float> %ret
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}
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