llvm-6502/test/CodeGen/SystemZ/vec-const-14.ll
Ulrich Weigand aa5c996eda [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

114 lines
3.2 KiB
LLVM

; Test vector replicates that use VECTOR GENERATE MASK, v8i16 version.
;
; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z13 | FileCheck %s
; Test a word-granularity replicate with the lowest value that cannot use
; VREPIF.
define <8 x i16> @f1() {
; CHECK-LABEL: f1:
; CHECK: vgmf %v24, 16, 16
; CHECK: br %r14
ret <8 x i16> <i16 0, i16 32768, i16 0, i16 32768,
i16 0, i16 32768, i16 0, i16 32768>
}
; Test a word-granularity replicate that has the lower 17 bits set.
define <8 x i16> @f2() {
; CHECK-LABEL: f2:
; CHECK: vgmf %v24, 15, 31
; CHECK: br %r14
ret <8 x i16> <i16 1, i16 -1, i16 1, i16 -1,
i16 1, i16 -1, i16 1, i16 -1>
}
; Test a word-granularity replicate that has the upper 15 bits set.
define <8 x i16> @f3() {
; CHECK-LABEL: f3:
; CHECK: vgmf %v24, 0, 14
; CHECK: br %r14
ret <8 x i16> <i16 -2, i16 0, i16 -2, i16 0,
i16 -2, i16 0, i16 -2, i16 0>
}
; Test a word-granularity replicate that has middle bits set.
define <8 x i16> @f4() {
; CHECK-LABEL: f4:
; CHECK: vgmf %v24, 12, 17
; CHECK: br %r14
ret <8 x i16> <i16 15, i16 49152, i16 15, i16 49152,
i16 15, i16 49152, i16 15, i16 49152>
}
; Test a word-granularity replicate with a wrap-around mask.
define <8 x i16> @f5() {
; CHECK-LABEL: f5:
; CHECK: vgmf %v24, 17, 15
; CHECK: br %r14
ret <8 x i16> <i16 -1, i16 32767, i16 -1, i16 32767,
i16 -1, i16 32767, i16 -1, i16 32767>
}
; Test a doubleword-granularity replicate with the lowest value that cannot
; use VREPIG.
define <8 x i16> @f6() {
; CHECK-LABEL: f6:
; CHECK: vgmg %v24, 48, 48
; CHECK: br %r14
ret <8 x i16> <i16 0, i16 0, i16 0, i16 32768,
i16 0, i16 0, i16 0, i16 32768>
}
; Test a doubleword-granularity replicate that has the lower 22 bits set.
define <8 x i16> @f7() {
; CHECK-LABEL: f7:
; CHECK: vgmg %v24, 42, 63
; CHECK: br %r14
ret <8 x i16> <i16 0, i16 0, i16 63, i16 -1,
i16 0, i16 0, i16 63, i16 -1>
}
; Test a doubleword-granularity replicate that has the upper 45 bits set.
define <8 x i16> @f8() {
; CHECK-LABEL: f8:
; CHECK: vgmg %v24, 0, 44
; CHECK: br %r14
ret <8 x i16> <i16 -1, i16 -1, i16 -8, i16 0,
i16 -1, i16 -1, i16 -8, i16 0>
}
; Test a doubleword-granularity replicate that has middle bits set.
define <8 x i16> @f9() {
; CHECK-LABEL: f9:
; CHECK: vgmg %v24, 31, 42
; CHECK: br %r14
ret <8 x i16> <i16 0, i16 1, i16 -32, i16 0,
i16 0, i16 1, i16 -32, i16 0>
}
; Test a doubleword-granularity replicate with a wrap-around mask.
define <8 x i16> @f10() {
; CHECK-LABEL: f10:
; CHECK: vgmg %v24, 18, 0
; CHECK: br %r14
ret <8 x i16> <i16 32768, i16 16383, i16 -1, i16 -1,
i16 32768, i16 16383, i16 -1, i16 -1>
}
; Retest f1 with arbitrary undefs instead of 0s.
define <8 x i16> @f11() {
; CHECK-LABEL: f11:
; CHECK: vgmf %v24, 16, 16
; CHECK: br %r14
ret <8 x i16> <i16 undef, i16 32768, i16 0, i16 32768,
i16 0, i16 32768, i16 undef, i16 32768>
}
; ...likewise f9.
define <8 x i16> @f12() {
; CHECK-LABEL: f12:
; CHECK: vgmg %v24, 31, 42
; CHECK: br %r14
ret <8 x i16> <i16 undef, i16 1, i16 -32, i16 0,
i16 0, i16 1, i16 -32, i16 undef>
}