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1bbf72b069
32-bit indices. Instead of shuffling each element out of the index vector, when all indices are needed, just store the input vector to the stack and load the elements out. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98588 91177308-0d34-0410-b5e6-96231b3b80d8
40 lines
1.4 KiB
LLVM
40 lines
1.4 KiB
LLVM
; RUN: llc -march=x86-64 < %s | FileCheck %s
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; When doing vector gather-scatter index calculation with 32-bit indices,
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; bounce the vector off of cache rather than shuffling each individual
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; element out of the index vector.
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; CHECK: pand (%rdx), %xmm0
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; CHECK: movaps %xmm0, -24(%rsp)
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; CHECK: movslq -24(%rsp), %rax
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; CHECK: movsd (%rdi,%rax,8), %xmm0
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; CHECK: movslq -20(%rsp), %rax
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; CHECK: movhpd (%rdi,%rax,8), %xmm0
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; CHECK: movslq -16(%rsp), %rax
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; CHECK: movsd (%rdi,%rax,8), %xmm1
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; CHECK: movslq -12(%rsp), %rax
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; CHECK: movhpd (%rdi,%rax,8), %xmm1
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define <4 x double> @foo(double* %p, <4 x i32>* %i, <4 x i32>* %h) nounwind {
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%a = load <4 x i32>* %i
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%b = load <4 x i32>* %h
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%j = and <4 x i32> %a, %b
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%d0 = extractelement <4 x i32> %j, i32 0
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%d1 = extractelement <4 x i32> %j, i32 1
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%d2 = extractelement <4 x i32> %j, i32 2
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%d3 = extractelement <4 x i32> %j, i32 3
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%q0 = getelementptr double* %p, i32 %d0
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%q1 = getelementptr double* %p, i32 %d1
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%q2 = getelementptr double* %p, i32 %d2
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%q3 = getelementptr double* %p, i32 %d3
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%r0 = load double* %q0
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%r1 = load double* %q1
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%r2 = load double* %q2
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%r3 = load double* %q3
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%v0 = insertelement <4 x double> undef, double %r0, i32 0
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%v1 = insertelement <4 x double> %v0, double %r1, i32 1
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%v2 = insertelement <4 x double> %v1, double %r2, i32 2
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%v3 = insertelement <4 x double> %v2, double %r3, i32 3
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ret <4 x double> %v3
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}
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