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llvm-project/llvm/test/CodeGen/PowerPC/vsx-spill.ll

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[PowerPC] Add subregister classes for f64 VSX values We had stored both f64 values and v2f64, etc. values in the VSX registers. This worked, but was suboptimal because we would always spill 16-byte values even through we almost always had scalar 8-byte values. This resulted in an increase in stack-size use, extra memory bandwidth, etc. To fix this, I've added 64-bit subregisters of the Altivec registers, and combined those with the existing scalar floating-point registers to form a class of VSX scalar floating-point registers. The ABI code has also been enhanced to use this register class and some other necessary improvements have been made. llvm-svn: 205075
2014-03-29 13:29:01 +08:00
; RUN: llc -mcpu=pwr7 -mattr=+vsx < %s | FileCheck %s
target datalayout = "E-m:e-i64:64-n32:64"
target triple = "powerpc64-unknown-linux-gnu"
define double @foo1(double %a) nounwind {
entry:
call void asm sideeffect "", "~{f0},~{f1},~{f2},~{f3},~{f4},~{f5},~{f6},~{f7},~{f8},~{f9},~{f10},~{f11},~{f12},~{f13},~{f14},~{f15},~{f16},~{f17},~{f18},~{f19},~{f20},~{f21},~{f22},~{f23},~{f24},~{f25},~{f26},~{f27},~{f28},~{f29},~{f30},~{f31}"() nounwind
br label %return
; CHECK: @foo1
; CHECK: xxlor [[R1:[0-9]+]], 1, 1
; CHECK: xxlor 1, [[R1]], [[R1]]
; CHECK: blr
return: ; preds = %entry
ret double %a
}
define double @foo2(double %a) nounwind {
entry:
%b = fadd double %a, %a
call void asm sideeffect "", "~{f0},~{f1},~{f2},~{f3},~{f4},~{f5},~{f6},~{f7},~{f8},~{f9},~{f10},~{f11},~{f12},~{f13},~{f14},~{f15},~{f16},~{f17},~{f18},~{f19},~{f20},~{f21},~{f22},~{f23},~{f24},~{f25},~{f26},~{f27},~{f28},~{f29},~{f30},~{f31}"() nounwind
br label %return
; CHECK: @foo2
; CHECK: {{xxlor|xsadddp}} [[R1:[0-9]+]], 1, 1
; CHECK: {{xxlor|xsadddp}} 1, [[R1]], [[R1]]
; CHECK: blr
return: ; preds = %entry
ret double %b
}
define double @foo3(double %a) nounwind {
entry:
call void asm sideeffect "", "~{f0},~{f1},~{f2},~{f3},~{f4},~{f5},~{f6},~{f7},~{f8},~{f9},~{f10},~{f11},~{f12},~{f13},~{f14},~{f15},~{f16},~{f17},~{f18},~{f19},~{f20},~{f21},~{f22},~{f23},~{f24},~{f25},~{f26},~{f27},~{f28},~{f29},~{f30},~{f31},~{v0},~{v1},~{v2},~{v3},~{v4},~{v5},~{v6},~{v7},~{v8},~{v9},~{v10},~{v11},~{v12},~{v13},~{v14},~{v15},~{v16},~{v17},~{v18},~{v19},~{v20},~{v21},~{v22},~{v23},~{v24},~{v25},~{v26},~{v27},~{v28},~{v29},~{v30},~{v31}"() nounwind
br label %return
; CHECK: @foo3
; CHECK: stxsdx 1,
; CHECK: lxsdx [[R1:[0-9]+]],
; CHECK: xsadddp 1, [[R1]], [[R1]]
; CHECK: blr
return: ; preds = %entry
%b = fadd double %a, %a
ret double %b
}