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llvm-mirror/test/CodeGen/X86/palignr.ll
Simon Pilgrim d654e7d40c [X86] Handle COPYs of physregs better (regalloc hints) 
Enable enableMultipleCopyHints() on X86.

Original Patch by @jonpa:

While enabling the mischeduler for SystemZ, it was discovered that for some reason a test needed one extra seemingly needless COPY (test/CodeGen/SystemZ/call-03.ll). The handling for that is resulted in this patch, which improves the register coalescing by providing not just one copy hint, but a sorted list of copy hints. On SystemZ, this gives ~12500 less register moves on SPEC, as well as marginally less spilling.

Instead of improving just the SystemZ backend, the improvement has been implemented in common-code (calculateSpillWeightAndHint(). This gives a lot of test failures, but since this should be a general improvement I hope that the involved targets will help and review the test updates.

Differential Revision: https://reviews.llvm.org/D38128

llvm-svn: 342578
2018-09-19 18:59:08 +00:00

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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=i686-unknown -mattr=+sse2 | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-SSE --check-prefix=CHECK-SSE2
; RUN: llc < %s -mtriple=i686-unknown -mattr=+ssse3 | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-SSE --check-prefix=CHECK-SSSE3
; RUN: llc < %s -mtriple=i686-unknown -mattr=+avx | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-AVX
define <4 x i32> @test1(<4 x i32> %A, <4 x i32> %B) nounwind {
; CHECK-SSE-LABEL: test1:
; CHECK-SSE: # %bb.0:
; CHECK-SSE-NEXT: pshufd {{.*#+}} xmm0 = xmm0[1,2,3,0]
; CHECK-SSE-NEXT: retl
;
; CHECK-AVX-LABEL: test1:
; CHECK-AVX: # %bb.0:
; CHECK-AVX-NEXT: vpermilps {{.*#+}} xmm0 = xmm0[1,2,3,0]
; CHECK-AVX-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-SSE2-LABEL: test2:
; CHECK-SSE2: # %bb.0:
; CHECK-SSE2-NEXT: shufps {{.*#+}} xmm1 = xmm1[0,0],xmm0[3,0]
; CHECK-SSE2-NEXT: shufps {{.*#+}} xmm0 = xmm0[1,2],xmm1[2,0]
; CHECK-SSE2-NEXT: retl
;
; CHECK-SSSE3-LABEL: test2:
; CHECK-SSSE3: # %bb.0:
; CHECK-SSSE3-NEXT: palignr {{.*#+}} xmm1 = xmm0[4,5,6,7,8,9,10,11,12,13,14,15],xmm1[0,1,2,3]
; CHECK-SSSE3-NEXT: movdqa %xmm1, %xmm0
; CHECK-SSSE3-NEXT: retl
;
; CHECK-AVX-LABEL: test2:
; CHECK-AVX: # %bb.0:
; CHECK-AVX-NEXT: vpalignr {{.*#+}} xmm0 = xmm0[4,5,6,7,8,9,10,11,12,13,14,15],xmm1[0,1,2,3]
; CHECK-AVX-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-SSE2-LABEL: test3:
; CHECK-SSE2: # %bb.0:
; CHECK-SSE2-NEXT: shufps {{.*#+}} xmm0 = xmm0[1,2],xmm1[2,0]
; CHECK-SSE2-NEXT: retl
;
; CHECK-SSSE3-LABEL: test3:
; CHECK-SSSE3: # %bb.0:
; CHECK-SSSE3-NEXT: palignr {{.*#+}} xmm1 = xmm0[4,5,6,7,8,9,10,11,12,13,14,15],xmm1[0,1,2,3]
; CHECK-SSSE3-NEXT: movdqa %xmm1, %xmm0
; CHECK-SSSE3-NEXT: retl
;
; CHECK-AVX-LABEL: test3:
; CHECK-AVX: # %bb.0:
; CHECK-AVX-NEXT: vpalignr {{.*#+}} xmm0 = xmm0[4,5,6,7,8,9,10,11,12,13,14,15],xmm1[0,1,2,3]
; CHECK-AVX-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-SSE2-LABEL: test4:
; CHECK-SSE2: # %bb.0:
; CHECK-SSE2-NEXT: shufpd {{.*#+}} xmm1 = xmm1[1],xmm0[0]
; CHECK-SSE2-NEXT: movapd %xmm1, %xmm0
; CHECK-SSE2-NEXT: retl
;
; CHECK-SSSE3-LABEL: test4:
; CHECK-SSSE3: # %bb.0:
; CHECK-SSSE3-NEXT: palignr {{.*#+}} xmm0 = xmm1[8,9,10,11,12,13,14,15],xmm0[0,1,2,3,4,5,6,7]
; CHECK-SSSE3-NEXT: retl
;
; CHECK-AVX-LABEL: test4:
; CHECK-AVX: # %bb.0:
; CHECK-AVX-NEXT: vpalignr {{.*#+}} xmm0 = xmm1[8,9,10,11,12,13,14,15],xmm0[0,1,2,3,4,5,6,7]
; CHECK-AVX-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-SSE-LABEL: test5:
; CHECK-SSE: # %bb.0:
; CHECK-SSE-NEXT: shufpd {{.*#+}} xmm1 = xmm1[1],xmm0[0]
; CHECK-SSE-NEXT: movapd %xmm1, %xmm0
; CHECK-SSE-NEXT: retl
;
; CHECK-AVX-LABEL: test5:
; CHECK-AVX: # %bb.0:
; CHECK-AVX-NEXT: vshufpd {{.*#+}} xmm0 = xmm1[1],xmm0[0]
; CHECK-AVX-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-SSE2-LABEL: test6:
; CHECK-SSE2: # %bb.0:
; CHECK-SSE2-NEXT: psrldq {{.*#+}} xmm0 = xmm0[6,7,8,9,10,11,12,13,14,15],zero,zero,zero,zero,zero,zero
; CHECK-SSE2-NEXT: pslldq {{.*#+}} xmm1 = zero,zero,zero,zero,zero,zero,zero,zero,zero,zero,xmm1[0,1,2,3,4,5]
; CHECK-SSE2-NEXT: por %xmm1, %xmm0
; CHECK-SSE2-NEXT: retl
;
; CHECK-SSSE3-LABEL: test6:
; CHECK-SSSE3: # %bb.0:
; CHECK-SSSE3-NEXT: palignr {{.*#+}} xmm1 = xmm0[6,7,8,9,10,11,12,13,14,15],xmm1[0,1,2,3,4,5]
; CHECK-SSSE3-NEXT: movdqa %xmm1, %xmm0
; CHECK-SSSE3-NEXT: retl
;
; CHECK-AVX-LABEL: test6:
; CHECK-AVX: # %bb.0:
; CHECK-AVX-NEXT: vpalignr {{.*#+}} xmm0 = xmm0[6,7,8,9,10,11,12,13,14,15],xmm1[0,1,2,3,4,5]
; CHECK-AVX-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-SSE2-LABEL: test7:
; CHECK-SSE2: # %bb.0:
; CHECK-SSE2-NEXT: psrldq {{.*#+}} xmm0 = xmm0[10,11,12,13,14,15],zero,zero,zero,zero,zero,zero,zero,zero,zero,zero
; CHECK-SSE2-NEXT: pslldq {{.*#+}} xmm1 = zero,zero,zero,zero,zero,zero,xmm1[0,1,2,3,4,5,6,7,8,9]
; CHECK-SSE2-NEXT: por %xmm1, %xmm0
; CHECK-SSE2-NEXT: retl
;
; CHECK-SSSE3-LABEL: test7:
; CHECK-SSSE3: # %bb.0:
; CHECK-SSSE3-NEXT: palignr {{.*#+}} xmm1 = xmm0[10,11,12,13,14,15],xmm1[0,1,2,3,4,5,6,7,8,9]
; CHECK-SSSE3-NEXT: movdqa %xmm1, %xmm0
; CHECK-SSSE3-NEXT: retl
;
; CHECK-AVX-LABEL: test7:
; CHECK-AVX: # %bb.0:
; CHECK-AVX-NEXT: vpalignr {{.*#+}} xmm0 = xmm0[10,11,12,13,14,15],xmm1[0,1,2,3,4,5,6,7,8,9]
; CHECK-AVX-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-SSE2-LABEL: test8:
; CHECK-SSE2: # %bb.0:
; CHECK-SSE2-NEXT: psrldq {{.*#+}} xmm0 = xmm0[5,6,7,8,9,10,11,12,13,14,15],zero,zero,zero,zero,zero
; CHECK-SSE2-NEXT: pslldq {{.*#+}} xmm1 = zero,zero,zero,zero,zero,zero,zero,zero,zero,zero,zero,xmm1[0,1,2,3,4]
; CHECK-SSE2-NEXT: por %xmm1, %xmm0
; CHECK-SSE2-NEXT: retl
;
; CHECK-SSSE3-LABEL: test8:
; CHECK-SSSE3: # %bb.0:
; CHECK-SSSE3-NEXT: palignr {{.*#+}} xmm1 = xmm0[5,6,7,8,9,10,11,12,13,14,15],xmm1[0,1,2,3,4]
; CHECK-SSSE3-NEXT: movdqa %xmm1, %xmm0
; CHECK-SSSE3-NEXT: retl
;
; CHECK-AVX-LABEL: test8:
; CHECK-AVX: # %bb.0:
; CHECK-AVX-NEXT: vpalignr {{.*#+}} xmm0 = xmm0[5,6,7,8,9,10,11,12,13,14,15],xmm1[0,1,2,3,4]
; CHECK-AVX-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-SSE2-LABEL: test9:
; CHECK-SSE2: # %bb.0:
; CHECK-SSE2-NEXT: movdqa %xmm1, %xmm0
; CHECK-SSE2-NEXT: psrldq {{.*#+}} xmm1 = xmm1[2,3,4,5,6,7,8,9,10,11,12,13,14,15],zero,zero
; CHECK-SSE2-NEXT: pslldq {{.*#+}} xmm0 = zero,zero,zero,zero,zero,zero,zero,zero,zero,zero,zero,zero,zero,zero,xmm0[0,1]
; CHECK-SSE2-NEXT: por %xmm1, %xmm0
; CHECK-SSE2-NEXT: retl
;
; CHECK-SSSE3-LABEL: test9:
; CHECK-SSSE3: # %bb.0:
; CHECK-SSSE3-NEXT: movdqa %xmm1, %xmm0
; CHECK-SSSE3-NEXT: palignr {{.*#+}} xmm0 = xmm1[2,3,4,5,6,7,8,9,10,11,12,13,14,15],xmm0[0,1]
; CHECK-SSSE3-NEXT: retl
;
; CHECK-AVX-LABEL: test9:
; CHECK-AVX: # %bb.0:
; CHECK-AVX-NEXT: vpalignr {{.*#+}} xmm0 = xmm1[2,3,4,5,6,7,8,9,10,11,12,13,14,15,0,1]
; CHECK-AVX-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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