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llvm-6502/test/CodeGen/X86/palignr.ll
Simon Pilgrim a6943fff90 [X86][SSE] pslldq/psrldq byte shifts/rotation for SSE2 
This patch builds on http://reviews.llvm.org/D5598 to perform byte rotation shuffles (lowerVectorShuffleAsByteRotate) on pre-SSSE3 (palignr) targets - pre-SSSE3 is only enabled on i8 and i16 vector targets where it is a more definite performance gain.

I've also added a separate byte shift shuffle (lowerVectorShuffleAsByteShift) that makes use of the ability of the SLLDQ/SRLDQ instructions to implicitly shift in zero bytes to avoid the need to create a zero register if we had used palignr.

Differential Revision: http://reviews.llvm.org/D5699



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222340 91177308-0d34-0410-b5e6-96231b3b80d8
2014-11-19 10:06:49 +00:00

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; RUN: llc < %s -march=x86 -mcpu=core2 -mattr=+ssse3 | FileCheck %s
; RUN: llc < %s -march=x86 -mcpu=yonah | FileCheck --check-prefix=CHECK-YONAH %s
define <4 x i32> @test1(<4 x i32> %A, <4 x i32> %B) nounwind {
; CHECK-LABEL: test1:
; CHECK: # BB#0:
; CHECK-NEXT: pshufd {{.*#+}} xmm0 = xmm0[1,2,3,0]
; CHECK-NEXT: retl
;
; CHECK-YONAH-LABEL: test1:
; CHECK-YONAH: # BB#0:
; CHECK-YONAH-NEXT: pshufd {{.*#+}} xmm0 = xmm0[1,2,3,0]
; CHECK-YONAH-NEXT: retl
%C = shufflevector <4 x i32> %A, <4 x i32> undef, <4 x i32> < i32 1, i32 2, i32 3, i32 0 >
ret <4 x i32> %C
}
define <4 x i32> @test2(<4 x i32> %A, <4 x i32> %B) nounwind {
; CHECK-LABEL: test2:
; CHECK: # BB#0:
; CHECK-NEXT: palignr {{.*#+}} xmm1 = xmm0[4,5,6,7,8,9,10,11,12,13,14,15],xmm1[0,1,2,3]
; CHECK-NEXT: movdqa %xmm1, %xmm0
; CHECK-NEXT: retl
;
; CHECK-YONAH-LABEL: test2:
; CHECK-YONAH: # BB#0:
; CHECK-YONAH-NEXT: shufps {{.*#+}} xmm1 = xmm1[0,0],xmm0[3,0]
; CHECK-YONAH-NEXT: shufps {{.*#+}} xmm0 = xmm0[1,2],xmm1[2,0]
; CHECK-YONAH-NEXT: retl
%C = shufflevector <4 x i32> %A, <4 x i32> %B, <4 x i32> < i32 1, i32 2, i32 3, i32 4 >
ret <4 x i32> %C
}
define <4 x i32> @test3(<4 x i32> %A, <4 x i32> %B) nounwind {
; CHECK-LABEL: test3:
; CHECK: # BB#0:
; CHECK-NEXT: palignr {{.*#+}} xmm1 = xmm0[4,5,6,7,8,9,10,11,12,13,14,15],xmm1[0,1,2,3]
; CHECK-NEXT: movdqa %xmm1, %xmm0
; CHECK-NEXT: retl
;
; CHECK-YONAH-LABEL: test3:
; CHECK-YONAH: # BB#0:
; CHECK-YONAH-NEXT: shufps {{.*#+}} xmm0 = xmm0[1,2],xmm1[2,0]
; CHECK-YONAH-NEXT: retl
%C = shufflevector <4 x i32> %A, <4 x i32> %B, <4 x i32> < i32 1, i32 2, i32 undef, i32 4 >
ret <4 x i32> %C
}
define <4 x i32> @test4(<4 x i32> %A, <4 x i32> %B) nounwind {
; CHECK-LABEL: test4:
; CHECK: # BB#0:
; CHECK-NEXT: palignr {{.*#+}} xmm0 = xmm1[8,9,10,11,12,13,14,15],xmm0[0,1,2,3,4,5,6,7]
; CHECK-NEXT: retl
;
; CHECK-YONAH-LABEL: test4:
; CHECK-YONAH: # BB#0:
; CHECK-YONAH-NEXT: shufpd {{.*#+}} xmm1 = xmm1[1],xmm0[0]
; CHECK-YONAH-NEXT: movapd %xmm1, %xmm0
; CHECK-YONAH-NEXT: retl
%C = shufflevector <4 x i32> %A, <4 x i32> %B, <4 x i32> < i32 6, i32 7, i32 undef, i32 1 >
ret <4 x i32> %C
}
define <4 x float> @test5(<4 x float> %A, <4 x float> %B) nounwind {
; CHECK-LABEL: test5:
; CHECK: # BB#0:
; CHECK-NEXT: shufpd {{.*#+}} xmm1 = xmm1[1],xmm0[0]
; CHECK-NEXT: movapd %xmm1, %xmm0
; CHECK-NEXT: retl
;
; CHECK-YONAH-LABEL: test5:
; CHECK-YONAH: # BB#0:
; CHECK-YONAH-NEXT: shufpd {{.*#+}} xmm1 = xmm1[1],xmm0[0]
; CHECK-YONAH-NEXT: movapd %xmm1, %xmm0
; CHECK-YONAH-NEXT: retl
%C = shufflevector <4 x float> %A, <4 x float> %B, <4 x i32> < i32 6, i32 7, i32 undef, i32 1 >
ret <4 x float> %C
}
define <8 x i16> @test6(<8 x i16> %A, <8 x i16> %B) nounwind {
; CHECK-LABEL: test6:
; CHECK: # BB#0:
; CHECK-NEXT: palignr {{.*#+}} xmm1 = xmm0[6,7,8,9,10,11,12,13,14,15],xmm1[0,1,2,3,4,5]
; CHECK-NEXT: movdqa %xmm1, %xmm0
; CHECK-NEXT: retl
;
; CHECK-YONAH-LABEL: test6:
; CHECK-YONAH: # BB#0:
; CHECK-YONAH-NEXT: psrldq {{.*#+}} xmm0 = xmm0[6,7,8,9,10,11,12,13,14,15],zero,zero,zero,zero,zero,zero
; CHECK-YONAH-NEXT: pslldq {{.*#+}} xmm1 = zero,zero,zero,zero,zero,zero,zero,zero,zero,zero,xmm1[0,1,2,3,4,5]
; CHECK-YONAH-NEXT: por %xmm1, %xmm0
; CHECK-YONAH-NEXT: retl
%C = shufflevector <8 x i16> %A, <8 x i16> %B, <8 x i32> < i32 3, i32 4, i32 undef, i32 6, i32 7, i32 8, i32 9, i32 10 >
ret <8 x i16> %C
}
define <8 x i16> @test7(<8 x i16> %A, <8 x i16> %B) nounwind {
; CHECK-LABEL: test7:
; CHECK: # BB#0:
; CHECK-NEXT: palignr {{.*#+}} xmm1 = xmm0[10,11,12,13,14,15],xmm1[0,1,2,3,4,5,6,7,8,9]
; CHECK-NEXT: movdqa %xmm1, %xmm0
; CHECK-NEXT: retl
;
; CHECK-YONAH-LABEL: test7:
; CHECK-YONAH: # BB#0:
; CHECK-YONAH-NEXT: psrldq {{.*#+}} xmm0 = xmm0[10,11,12,13,14,15],zero,zero,zero,zero,zero,zero,zero,zero,zero,zero
; CHECK-YONAH-NEXT: pslldq {{.*#+}} xmm1 = zero,zero,zero,zero,zero,zero,xmm1[0,1,2,3,4,5,6,7,8,9]
; CHECK-YONAH-NEXT: por %xmm1, %xmm0
; CHECK-YONAH-NEXT: retl
%C = shufflevector <8 x i16> %A, <8 x i16> %B, <8 x i32> < i32 undef, i32 6, i32 undef, i32 8, i32 9, i32 10, i32 11, i32 12 >
ret <8 x i16> %C
}
define <16 x i8> @test8(<16 x i8> %A, <16 x i8> %B) nounwind {
; CHECK-LABEL: test8:
; CHECK: # BB#0:
; CHECK-NEXT: palignr {{.*#+}} xmm1 = xmm0[5,6,7,8,9,10,11,12,13,14,15],xmm1[0,1,2,3,4]
; CHECK-NEXT: movdqa %xmm1, %xmm0
; CHECK-NEXT: retl
;
; CHECK-YONAH-LABEL: test8:
; CHECK-YONAH: # BB#0:
; CHECK-YONAH-NEXT: psrldq {{.*#+}} xmm0 = xmm0[5,6,7,8,9,10,11,12,13,14,15],zero,zero,zero,zero,zero
; CHECK-YONAH-NEXT: pslldq {{.*#+}} xmm1 = zero,zero,zero,zero,zero,zero,zero,zero,zero,zero,zero,xmm1[0,1,2,3,4]
; CHECK-YONAH-NEXT: por %xmm1, %xmm0
; CHECK-YONAH-NEXT: retl
%C = shufflevector <16 x i8> %A, <16 x i8> %B, <16 x i32> < i32 5, i32 6, i32 7, i32 undef, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15, i32 16, i32 17, i32 18, i32 19, i32 20 >
ret <16 x i8> %C
}
; Check that we don't do unary (circular on single operand) palignr incorrectly.
; (It is possible, but before this testcase was committed, it was being done
; incorrectly. In particular, one of the operands of the palignr node
; was an UNDEF.)
define <8 x i16> @test9(<8 x i16> %A, <8 x i16> %B) nounwind {
; CHECK-LABEL: test9:
; CHECK: # BB#0:
; CHECK-NEXT: palignr {{.*#+}} xmm1 = xmm1[2,3,4,5,6,7,8,9,10,11,12,13,14,15,0,1]
; CHECK-NEXT: movdqa %xmm1, %xmm0
; CHECK-NEXT: retl
;
; CHECK-YONAH-LABEL: test9:
; CHECK-YONAH: # BB#0:
; CHECK-YONAH-NEXT: movdqa %xmm1, %xmm0
; CHECK-YONAH-NEXT: psrldq {{.*#+}} xmm0 = xmm0[2,3,4,5,6,7,8,9,10,11,12,13,14,15],zero,zero
; CHECK-YONAH-NEXT: pslldq {{.*#+}} xmm1 = zero,zero,zero,zero,zero,zero,zero,zero,zero,zero,zero,zero,zero,zero,xmm1[0,1]
; CHECK-YONAH-NEXT: por %xmm0, %xmm1
; CHECK-YONAH-NEXT: movdqa %xmm1, %xmm0
; CHECK-YONAH-NEXT: retl
%C = shufflevector <8 x i16> %B, <8 x i16> %A, <8 x i32> < i32 undef, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 0 >
ret <8 x i16> %C
}
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