mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-11-12 15:05:06 +00:00
1d02acb7a0
This trades a (register-renamer-friendly) movaps for a floating point / integer domain cross. That is a very bad trade, even on architectures where domain crossing is relatively fast. On any chip where there is even a cycle stall, this is a Very Bad Idea. It doesn't even seem likely to cause a spill to be introduced because the reason for the copy is to destructively shuffle in place. Thanks to Ben Kramer for fixing a bug in this code that my new shuffle lowering exposed and highlighting that perhaps it should just go away. =] git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219090 91177308-0d34-0410-b5e6-96231b3b80d8
95 lines
2.4 KiB
LLVM
95 lines
2.4 KiB
LLVM
; RUN: llc < %s -mtriple=x86_64-linux -mcpu=penryn -o - | FileCheck %s --check-prefix=X64
|
|
; RUN: llc < %s -mcpu=yonah -march=x86 -mtriple=i386-linux-gnu -o - | FileCheck %s --check-prefix=X32
|
|
|
|
; PR7518
|
|
define void @test1(<2 x float> %Q, float *%P2) nounwind {
|
|
; X64-LABEL: test1:
|
|
; X64: # BB#0:
|
|
; X64-NEXT: movaps %xmm0, %xmm1
|
|
; X64-NEXT: shufps {{.*#+}} xmm1 = xmm1[1,1,2,3]
|
|
; X64-NEXT: addss %xmm0, %xmm1
|
|
; X64-NEXT: movss %xmm1, (%rdi)
|
|
; X64-NEXT: retq
|
|
;
|
|
; X32-LABEL: test1:
|
|
; X32: # BB#0:
|
|
; X32-NEXT: movl {{[0-9]+}}(%esp), %eax
|
|
; X32-NEXT: movaps %xmm0, %xmm1
|
|
; X32-NEXT: shufps {{.*#+}} xmm1 = xmm1[1,1,2,3]
|
|
; X32-NEXT: addss %xmm0, %xmm1
|
|
; X32-NEXT: movss %xmm1, (%eax)
|
|
; X32-NEXT: retl
|
|
%a = extractelement <2 x float> %Q, i32 0
|
|
%b = extractelement <2 x float> %Q, i32 1
|
|
%c = fadd float %a, %b
|
|
store float %c, float* %P2
|
|
ret void
|
|
}
|
|
|
|
define <2 x float> @test2(<2 x float> %Q, <2 x float> %R, <2 x float> *%P) nounwind {
|
|
; X64-LABEL: test2:
|
|
; X64: # BB#0:
|
|
; X64-NEXT: addps %xmm1, %xmm0
|
|
; X64-NEXT: retq
|
|
;
|
|
; X32-LABEL: test2:
|
|
; X32: # BB#0:
|
|
; X32-NEXT: addps %xmm1, %xmm0
|
|
; X32-NEXT: retl
|
|
%Z = fadd <2 x float> %Q, %R
|
|
ret <2 x float> %Z
|
|
}
|
|
|
|
define <2 x float> @test3(<4 x float> %A) nounwind {
|
|
; X64-LABEL: test3:
|
|
; X64: # BB#0:
|
|
; X64-NEXT: addps %xmm0, %xmm0
|
|
; X64-NEXT: retq
|
|
;
|
|
; X32-LABEL: test3:
|
|
; X32: # BB#0:
|
|
; X32-NEXT: addps %xmm0, %xmm0
|
|
; X32-NEXT: retl
|
|
%B = shufflevector <4 x float> %A, <4 x float> undef, <2 x i32> <i32 0, i32 1>
|
|
%C = fadd <2 x float> %B, %B
|
|
ret <2 x float> %C
|
|
}
|
|
|
|
define <2 x float> @test4(<2 x float> %A) nounwind {
|
|
; X64-LABEL: test4:
|
|
; X64: # BB#0:
|
|
; X64-NEXT: addps %xmm0, %xmm0
|
|
; X64-NEXT: retq
|
|
;
|
|
; X32-LABEL: test4:
|
|
; X32: # BB#0:
|
|
; X32-NEXT: addps %xmm0, %xmm0
|
|
; X32-NEXT: retl
|
|
%C = fadd <2 x float> %A, %A
|
|
ret <2 x float> %C
|
|
}
|
|
|
|
define <4 x float> @test5(<4 x float> %A) nounwind {
|
|
; X64-LABEL: test5:
|
|
; X64: # BB#0:
|
|
; X64-NEXT: addps %xmm0, %xmm0
|
|
; X64-NEXT: addps %xmm0, %xmm0
|
|
; X64-NEXT: retq
|
|
;
|
|
; X32-LABEL: test5:
|
|
; X32: # BB#0:
|
|
; X32-NEXT: addps %xmm0, %xmm0
|
|
; X32-NEXT: addps %xmm0, %xmm0
|
|
; X32-NEXT: retl
|
|
%B = shufflevector <4 x float> %A, <4 x float> undef, <2 x i32> <i32 0, i32 1>
|
|
%C = fadd <2 x float> %B, %B
|
|
br label %BB
|
|
|
|
BB:
|
|
%D = fadd <2 x float> %C, %C
|
|
%E = shufflevector <2 x float> %D, <2 x float> undef, <4 x i32> <i32 0, i32 1, i32 undef, i32 undef>
|
|
ret <4 x float> %E
|
|
}
|
|
|
|
|