[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.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@236521 91177308-0d34-0410-b5e6-96231b3b80d8
2015-05-05 19:25:42 +00:00
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; Test replications of a scalar register value, represented as splats.
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z13 | FileCheck %s
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; Test v16i8 splat of the first element.
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define <16 x i8> @f1(i8 %scalar) {
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; CHECK-LABEL: f1:
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; CHECK: vlvgp [[REG:%v[0-9]+]], %r2, %r2
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; CHECK: vrepb %v24, [[REG]], 7
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; CHECK: br %r14
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%val = insertelement <16 x i8> undef, i8 %scalar, i32 0
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%ret = shufflevector <16 x i8> %val, <16 x i8> undef,
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<16 x i32> zeroinitializer
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ret <16 x i8> %ret
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}
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; Test v16i8 splat of the last element.
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define <16 x i8> @f2(i8 %scalar) {
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; CHECK-LABEL: f2:
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; CHECK: vlvgp [[REG:%v[0-9]+]], %r2, %r2
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; CHECK: vrepb %v24, [[REG]], 7
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; CHECK: br %r14
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%val = insertelement <16 x i8> undef, i8 %scalar, i32 15
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%ret = shufflevector <16 x i8> %val, <16 x i8> undef,
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<16 x i32> <i32 15, i32 15, i32 15, i32 15,
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i32 15, i32 15, i32 15, i32 15,
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i32 15, i32 15, i32 15, i32 15,
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i32 15, i32 15, i32 15, i32 15>
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ret <16 x i8> %ret
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}
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; Test v16i8 splat of an arbitrary element, using the second operand of
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; the shufflevector.
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define <16 x i8> @f3(i8 %scalar) {
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; CHECK-LABEL: f3:
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; CHECK: vlvgp [[REG:%v[0-9]+]], %r2, %r2
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; CHECK: vrepb %v24, [[REG]], 7
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; CHECK: br %r14
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%val = insertelement <16 x i8> undef, i8 %scalar, i32 4
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%ret = shufflevector <16 x i8> undef, <16 x i8> %val,
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<16 x i32> <i32 20, i32 20, i32 20, i32 20,
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i32 20, i32 20, i32 20, i32 20,
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i32 20, i32 20, i32 20, i32 20,
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i32 20, i32 20, i32 20, i32 20>
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ret <16 x i8> %ret
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}
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; Test v8i16 splat of the first element.
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define <8 x i16> @f4(i16 %scalar) {
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; CHECK-LABEL: f4:
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; CHECK: vlvgp [[REG:%v[0-9]+]], %r2, %r2
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; CHECK: vreph %v24, [[REG]], 3
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; CHECK: br %r14
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%val = insertelement <8 x i16> undef, i16 %scalar, i32 0
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%ret = shufflevector <8 x i16> %val, <8 x i16> undef,
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<8 x i32> zeroinitializer
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ret <8 x i16> %ret
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}
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; Test v8i16 splat of the last element.
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define <8 x i16> @f5(i16 %scalar) {
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; CHECK-LABEL: f5:
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; CHECK: vlvgp [[REG:%v[0-9]+]], %r2, %r2
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; CHECK: vreph %v24, [[REG]], 3
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; CHECK: br %r14
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%val = insertelement <8 x i16> undef, i16 %scalar, i32 7
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%ret = shufflevector <8 x i16> %val, <8 x i16> undef,
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<8 x i32> <i32 7, i32 7, i32 7, i32 7,
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i32 7, i32 7, i32 7, i32 7>
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ret <8 x i16> %ret
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}
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; Test v8i16 splat of an arbitrary element, using the second operand of
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; the shufflevector.
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define <8 x i16> @f6(i16 %scalar) {
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; CHECK-LABEL: f6:
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; CHECK: vlvgp [[REG:%v[0-9]+]], %r2, %r2
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; CHECK: vreph %v24, [[REG]], 3
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; CHECK: br %r14
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%val = insertelement <8 x i16> undef, i16 %scalar, i32 2
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%ret = shufflevector <8 x i16> undef, <8 x i16> %val,
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<8 x i32> <i32 10, i32 10, i32 10, i32 10,
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i32 10, i32 10, i32 10, i32 10>
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ret <8 x i16> %ret
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}
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; Test v4i32 splat of the first element.
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define <4 x i32> @f7(i32 %scalar) {
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; CHECK-LABEL: f7:
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; CHECK: vlvgp [[REG:%v[0-9]+]], %r2, %r2
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; CHECK: vrepf %v24, [[REG]], 1
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; CHECK: br %r14
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%val = insertelement <4 x i32> undef, i32 %scalar, i32 0
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%ret = shufflevector <4 x i32> %val, <4 x i32> undef,
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<4 x i32> zeroinitializer
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ret <4 x i32> %ret
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}
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; Test v4i32 splat of the last element.
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define <4 x i32> @f8(i32 %scalar) {
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; CHECK-LABEL: f8:
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; CHECK: vlvgp [[REG:%v[0-9]+]], %r2, %r2
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; CHECK: vrepf %v24, [[REG]], 1
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; CHECK: br %r14
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%val = insertelement <4 x i32> undef, i32 %scalar, i32 3
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%ret = shufflevector <4 x i32> %val, <4 x i32> undef,
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<4 x i32> <i32 3, i32 3, i32 3, i32 3>
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ret <4 x i32> %ret
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}
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; Test v4i32 splat of an arbitrary element, using the second operand of
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; the shufflevector.
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define <4 x i32> @f9(i32 %scalar) {
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; CHECK-LABEL: f9:
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; CHECK: vlvgp [[REG:%v[0-9]+]], %r2, %r2
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; CHECK: vrepf %v24, [[REG]], 1
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; CHECK: br %r14
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%val = insertelement <4 x i32> undef, i32 %scalar, i32 1
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%ret = shufflevector <4 x i32> undef, <4 x i32> %val,
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<4 x i32> <i32 5, i32 5, i32 5, i32 5>
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ret <4 x i32> %ret
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}
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; Test v2i64 splat of the first element.
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define <2 x i64> @f10(i64 %scalar) {
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; CHECK-LABEL: f10:
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; CHECK: vlvgp %v24, %r2, %r2
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; CHECK: br %r14
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%val = insertelement <2 x i64> undef, i64 %scalar, i32 0
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%ret = shufflevector <2 x i64> %val, <2 x i64> undef,
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<2 x i32> zeroinitializer
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ret <2 x i64> %ret
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}
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; Test v2i64 splat of the last element.
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define <2 x i64> @f11(i64 %scalar) {
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; CHECK-LABEL: f11:
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; CHECK: vlvgp %v24, %r2, %r2
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; CHECK: br %r14
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%val = insertelement <2 x i64> undef, i64 %scalar, i32 1
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%ret = shufflevector <2 x i64> %val, <2 x i64> undef,
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<2 x i32> <i32 1, i32 1>
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ret <2 x i64> %ret
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}
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2015-05-05 19:26:48 +00:00
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2015-05-05 19:27:45 +00:00
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; Test v4f32 splat of the first element.
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define <4 x float> @f12(float %scalar) {
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; CHECK-LABEL: f12:
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; CHECK: vrepf %v24, %v0, 0
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; CHECK: br %r14
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%val = insertelement <4 x float> undef, float %scalar, i32 0
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%ret = shufflevector <4 x float> %val, <4 x float> undef,
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<4 x i32> zeroinitializer
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ret <4 x float> %ret
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}
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; Test v4f32 splat of the last element.
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define <4 x float> @f13(float %scalar) {
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; CHECK-LABEL: f13:
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; CHECK: vrepf %v24, %v0, 0
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; CHECK: br %r14
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%val = insertelement <4 x float> undef, float %scalar, i32 3
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%ret = shufflevector <4 x float> %val, <4 x float> undef,
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<4 x i32> <i32 3, i32 3, i32 3, i32 3>
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ret <4 x float> %ret
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}
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; Test v4f32 splat of an arbitrary element, using the second operand of
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; the shufflevector.
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define <4 x float> @f14(float %scalar) {
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; CHECK-LABEL: f14:
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; CHECK: vrepf %v24, %v0, 0
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; CHECK: br %r14
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%val = insertelement <4 x float> undef, float %scalar, i32 1
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%ret = shufflevector <4 x float> undef, <4 x float> %val,
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<4 x i32> <i32 5, i32 5, i32 5, i32 5>
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ret <4 x float> %ret
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}
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2015-05-05 19:26:48 +00:00
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; Test v2f64 splat of the first element.
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define <2 x double> @f15(double %scalar) {
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; CHECK-LABEL: f15:
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; CHECK: vrepg %v24, %v0, 0
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; CHECK: br %r14
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%val = insertelement <2 x double> undef, double %scalar, i32 0
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%ret = shufflevector <2 x double> %val, <2 x double> undef,
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<2 x i32> zeroinitializer
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ret <2 x double> %ret
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}
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; Test v2f64 splat of the last element.
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define <2 x double> @f16(double %scalar) {
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; CHECK-LABEL: f16:
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; CHECK: vrepg %v24, %v0, 0
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; CHECK: br %r14
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%val = insertelement <2 x double> undef, double %scalar, i32 1
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%ret = shufflevector <2 x double> %val, <2 x double> undef,
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<2 x i32> <i32 1, i32 1>
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ret <2 x double> %ret
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}
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