gather-addresses.ll   [plain text]

; RUN: llc -mtriple=x86_64-linux -mcpu=nehalem < %s | FileCheck %s
; RUN: llc -mtriple=x86_64-win32 -mcpu=nehalem < %s | FileCheck %s
; rdar://7398554

; When doing vector gather-scatter index calculation with 32-bit indices,
; bounce the vector off of cache rather than shuffling each individual
; element out of the index vector.

; CHECK: andps    ([[H:%rdx|%r8]]), %xmm0
; CHECK: movaps   %xmm0, {{(-24)?}}(%rsp)
; CHECK: movslq   {{(-24)?}}(%rsp), %rax
; CHECK: movsd    ([[P:%rdi|%rcx]],%rax,8), %xmm0
; CHECK: movslq   {{-20|4}}(%rsp), %rax
; CHECK: movhpd   ([[P]],%rax,8), %xmm0
; CHECK: movslq   {{-16|8}}(%rsp), %rax
; CHECK: movsd    ([[P]],%rax,8), %xmm1
; CHECK: movslq   {{-12|12}}(%rsp), %rax
; CHECK: movhpd   ([[P]],%rax,8), %xmm1

define <4 x double> @foo(double* %p, <4 x i32>* %i, <4 x i32>* %h) nounwind {
  %a = load <4 x i32>* %i
  %b = load <4 x i32>* %h
  %j = and <4 x i32> %a, %b
  %d0 = extractelement <4 x i32> %j, i32 0
  %d1 = extractelement <4 x i32> %j, i32 1
  %d2 = extractelement <4 x i32> %j, i32 2
  %d3 = extractelement <4 x i32> %j, i32 3
  %q0 = getelementptr double* %p, i32 %d0
  %q1 = getelementptr double* %p, i32 %d1
  %q2 = getelementptr double* %p, i32 %d2
  %q3 = getelementptr double* %p, i32 %d3
  %r0 = load double* %q0
  %r1 = load double* %q1
  %r2 = load double* %q2
  %r3 = load double* %q3
  %v0 = insertelement <4 x double> undef, double %r0, i32 0
  %v1 = insertelement <4 x double> %v0, double %r1, i32 1
  %v2 = insertelement <4 x double> %v1, double %r2, i32 2
  %v3 = insertelement <4 x double> %v2, double %r3, i32 3
  ret <4 x double> %v3
}