llvm/test/CodeGen/PowerPC/remove-redundant-moves.ll
Nemanja Ivanovic fe4ad6d3ea [PowerPC] Remove redundant direct moves when extracting integers and converting to FP
This patch corresponds to review:
https://reviews.llvm.org/D21354

We use direct moves for extracting integer elements from vectors. We also use
direct moves when converting integers to FP. When these operations are chained,
we get a direct move out of a VSR followed by a direct move back into a VSR.
These are redundant - all we need to do is line up the element and convert.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@275796 91177308-0d34-0410-b5e6-96231b3b80d8
2016-07-18 15:30:00 +00:00

108 lines
2.7 KiB
LLVM

; RUN: llc -mcpu=pwr8 -mtriple=powerpc64le-unknown-linux-gnu \
; RUN: -verify-machineinstrs < %s | FileCheck %s
; RUN: llc -mcpu=pwr8 -mtriple=powerpc64-unknown-linux-gnu \
; RUN: -verify-machineinstrs < %s | FileCheck %s --check-prefix=CHECK-BE
define double @test1(<2 x i64> %a) {
entry:
; CHECK-LABEL: test1
; CHECK: xxswapd [[SW:[0-9]+]], 34
; CHECK: xscvsxddp 1, [[SW]]
; CHECK-BE-LABEL: test1
; CHECK-BE: xxlor [[CP:[0-9]+]], 34, 34
; CHECK-BE: xscvsxddp 1, [[CP]]
%0 = extractelement <2 x i64> %a, i32 0
%1 = sitofp i64 %0 to double
ret double %1
}
define double @test2(<2 x i64> %a) {
entry:
; CHECK-LABEL: test2
; CHECK: xxlor [[CP:[0-9]+]], 34, 34
; CHECK: xscvsxddp 1, [[CP]]
; CHECK-BE-LABEL: test2
; CHECK-BE: xxswapd [[SW:[0-9]+]], 34
; CHECK-BE: xscvsxddp 1, [[SW]]
%0 = extractelement <2 x i64> %a, i32 1
%1 = sitofp i64 %0 to double
ret double %1
}
define float @test1f(<2 x i64> %a) {
entry:
; CHECK-LABEL: test1f
; CHECK: xxswapd [[SW:[0-9]+]], 34
; CHECK: xscvsxdsp 1, [[SW]]
; CHECK-BE-LABEL: test1f
; CHECK-BE: xxlor [[CP:[0-9]+]], 34, 34
; CHECK-BE: xscvsxdsp 1, [[CP]]
%0 = extractelement <2 x i64> %a, i32 0
%1 = sitofp i64 %0 to float
ret float %1
}
define float @test2f(<2 x i64> %a) {
entry:
; CHECK-LABEL: test2f
; CHECK: xxlor [[CP:[0-9]+]], 34, 34
; CHECK: xscvsxdsp 1, [[CP]]
; CHECK-BE-LABEL: test2f
; CHECK-BE: xxswapd [[SW:[0-9]+]], 34
; CHECK-BE: xscvsxdsp 1, [[SW]]
%0 = extractelement <2 x i64> %a, i32 1
%1 = sitofp i64 %0 to float
ret float %1
}
define double @test1u(<2 x i64> %a) {
entry:
; CHECK-LABEL: test1u
; CHECK: xxswapd [[SW:[0-9]+]], 34
; CHECK: xscvuxddp 1, [[SW]]
; CHECK-BE-LABEL: test1u
; CHECK-BE: xxlor [[CP:[0-9]+]], 34, 34
; CHECK-BE: xscvuxddp 1, [[CP]]
%0 = extractelement <2 x i64> %a, i32 0
%1 = uitofp i64 %0 to double
ret double %1
}
define double @test2u(<2 x i64> %a) {
entry:
; CHECK-LABEL: test2u
; CHECK: xxlor [[CP:[0-9]+]], 34, 34
; CHECK: xscvuxddp 1, [[CP]]
; CHECK-BE-LABEL: test2u
; CHECK-BE: xxswapd [[SW:[0-9]+]], 34
; CHECK-BE: xscvuxddp 1, [[SW]]
%0 = extractelement <2 x i64> %a, i32 1
%1 = uitofp i64 %0 to double
ret double %1
}
define float @test1fu(<2 x i64> %a) {
entry:
; CHECK-LABEL: test1fu
; CHECK: xxswapd [[SW:[0-9]+]], 34
; CHECK: xscvuxdsp 1, [[SW]]
; CHECK-BE-LABEL: test1fu
; CHECK-BE: xxlor [[CP:[0-9]+]], 34, 34
; CHECK-BE: xscvuxdsp 1, [[CP]]
%0 = extractelement <2 x i64> %a, i32 0
%1 = uitofp i64 %0 to float
ret float %1
}
define float @test2fu(<2 x i64> %a) {
entry:
; CHECK-LABEL: test2fu
; CHECK: xxlor [[CP:[0-9]+]], 34, 34
; CHECK: xscvuxdsp 1, [[CP]]
; CHECK-BE-LABEL: test2fu
; CHECK-BE: xxswapd [[SW:[0-9]+]], 34
; CHECK-BE: xscvuxdsp 1, [[SW]]
%0 = extractelement <2 x i64> %a, i32 1
%1 = uitofp i64 %0 to float
ret float %1
}