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[VP] Add test to show optimization opportunities 

Add vp.add test cases that can are optimized with D92086 to show the
potential of generalized pattern rewriting.

Reviewed By: frasercrmck

Differential Revision: https://reviews.llvm.org/D129746
This commit is contained in:
Simon Moll 2022-07-14 12:36:22 +02:00
parent c164efb006
commit 173d4b84f6
1 changed files with 91 additions and 0 deletions
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91
llvm/test/Transforms/InstSimplify/add_vp.ll Normal file
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -instsimplify -S | FileCheck %s
declare <2 x i32> @llvm.vp.add.v2i32(<2 x i32>, <2 x i32>, <2 x i1>, i32)
declare <2 x i32> @llvm.vp.sub.v2i32(<2 x i32>, <2 x i32>, <2 x i1>, i32)
declare <2 x i8> @llvm.vp.add.v2i8(<2 x i8>, <2 x i8>, <2 x i1>, i32)
declare <2 x i8> @llvm.vp.sub.v2i8(<2 x i8>, <2 x i8>, <2 x i1>, i32)
; Constant folding should just work.
define <2 x i32> @constant_vp_add(<2 x i1> %mask, i32 %evl) {
; CHECK-LABEL: @constant_vp_add(
; CHECK-NEXT: [[Q:%.*]] = call <2 x i32> @llvm.vp.add.v2i32(<2 x i32> <i32 3, i32 3>, <2 x i32> <i32 7, i32 7>, <2 x i1> [[MASK:%.*]], i32 [[EVL:%.*]])
; CHECK-NEXT: ret <2 x i32> [[Q]]
;
%Q = call <2 x i32> @llvm.vp.add.v2i32(<2 x i32> <i32 3, i32 3>, <2 x i32> <i32 7, i32 7>, <2 x i1> %mask, i32 %evl)
ret <2 x i32> %Q
}
; Simplifying pure VP intrinsic patterns.
define <2 x i32> @common_sub_operand(<2 x i32> %X, <2 x i32> %Y, <2 x i1> %mask, i32 %evl) {
; CHECK-LABEL: @common_sub_operand(
; CHECK-NEXT: [[Z:%.*]] = call <2 x i32> @llvm.vp.sub.v2i32(<2 x i32> [[X:%.*]], <2 x i32> [[Y:%.*]], <2 x i1> [[MASK:%.*]], i32 [[EVL:%.*]])
; CHECK-NEXT: [[Q:%.*]] = call <2 x i32> @llvm.vp.add.v2i32(<2 x i32> [[Z]], <2 x i32> [[Y]], <2 x i1> [[MASK]], i32 [[EVL]])
; CHECK-NEXT: ret <2 x i32> [[Q]]
;
; %Z = sub i32 %X, %Y, vp(%mask, %evl)
%Z = call <2 x i32> @llvm.vp.sub.v2i32(<2 x i32> %X, <2 x i32> %Y, <2 x i1> %mask, i32 %evl)
; %Q = add i32 %Z, %Y, vp(%mask, %evl)
%Q = call <2 x i32> @llvm.vp.add.v2i32(<2 x i32> %Z, <2 x i32> %Y, <2 x i1> %mask, i32 %evl)
ret <2 x i32> %Q
}
; Mixing regular SIMD with vp intrinsics (vp add match root).
define <2 x i32> @common_sub_operand_vproot(<2 x i32> %X, <2 x i32> %Y, <2 x i1> %mask, i32 %evl) {
; CHECK-LABEL: @common_sub_operand_vproot(
; CHECK-NEXT: [[Z:%.*]] = sub <2 x i32> [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[Q:%.*]] = call <2 x i32> @llvm.vp.add.v2i32(<2 x i32> [[Z]], <2 x i32> [[Y]], <2 x i1> [[MASK:%.*]], i32 [[EVL:%.*]])
; CHECK-NEXT: ret <2 x i32> [[Q]]
;
%Z = sub <2 x i32> %X, %Y
; %Q = add i32 %Z, %Y, vp(%mask, %evl)
%Q = call <2 x i32> @llvm.vp.add.v2i32(<2 x i32> %Z, <2 x i32> %Y, <2 x i1> %mask, i32 %evl)
ret <2 x i32> %Q
}
; Mixing regular SIMD with vp intrinsics (vp inside pattern, regular instruction root).
define <2 x i32> @common_sub_operand_vpinner(<2 x i32> %X, <2 x i32> %Y, <2 x i1> %mask, i32 %evl) {
; CHECK-LABEL: @common_sub_operand_vpinner(
; CHECK-NEXT: [[Z:%.*]] = call <2 x i32> @llvm.vp.sub.v2i32(<2 x i32> [[X:%.*]], <2 x i32> [[Y:%.*]], <2 x i1> [[MASK:%.*]], i32 [[EVL:%.*]])
; CHECK-NEXT: [[Q:%.*]] = add <2 x i32> [[Z]], [[Y]]
; CHECK-NEXT: ret <2 x i32> [[Q]]
;
; %Z = sub i32 %X, %Y, vp(%mask, %evl)
%Z = call <2 x i32> @llvm.vp.sub.v2i32(<2 x i32> %X, <2 x i32> %Y, <2 x i1> %mask, i32 %evl)
%Q = add <2 x i32> %Z, %Y
ret <2 x i32> %Q
}
define <2 x i32> @negated_operand(<2 x i32> %x, <2 x i1> %mask, i32 %evl) {
; CHECK-LABEL: @negated_operand(
; CHECK-NEXT: [[NEGX:%.*]] = call <2 x i32> @llvm.vp.sub.v2i32(<2 x i32> zeroinitializer, <2 x i32> [[X:%.*]], <2 x i1> [[MASK:%.*]], i32 [[EVL:%.*]])
; CHECK-NEXT: [[R:%.*]] = call <2 x i32> @llvm.vp.add.v2i32(<2 x i32> [[NEGX]], <2 x i32> [[X]], <2 x i1> [[MASK]], i32 [[EVL]])
; CHECK-NEXT: ret <2 x i32> [[R]]
;
; %negx = sub i32 0, %x
%negx = call <2 x i32> @llvm.vp.sub.v2i32(<2 x i32> zeroinitializer, <2 x i32> %x, <2 x i1> %mask, i32 %evl)
; %r = add i32 %negx, %x
%r = call <2 x i32> @llvm.vp.add.v2i32(<2 x i32> %negx, <2 x i32> %x, <2 x i1> %mask, i32 %evl)
ret <2 x i32> %r
}
; TODO Lift InstSimplify::SimplifyAdd to the trait framework to optimize this.
define <2 x i8> @knownnegation(<2 x i8> %x, <2 x i8> %y, <2 x i1> %mask, i32 %evl) {
; TODO-CHECK-LABEL: @knownnegation(
; TODO-XHECK-NEXT: ret i8 <2 x i8> zeroinitializer
;
; %xy = sub i8 %x, %y
; CHECK-LABEL: @knownnegation(
; CHECK-NEXT: [[XY:%.*]] = call <2 x i8> @llvm.vp.sub.v2i8(<2 x i8> [[X:%.*]], <2 x i8> [[Y:%.*]], <2 x i1> [[MASK:%.*]], i32 [[EVL:%.*]])
; CHECK-NEXT: [[YX:%.*]] = call <2 x i8> @llvm.vp.sub.v2i8(<2 x i8> [[Y]], <2 x i8> [[X]], <2 x i1> [[MASK]], i32 [[EVL]])
; CHECK-NEXT: [[R:%.*]] = call <2 x i8> @llvm.vp.add.v2i8(<2 x i8> [[XY]], <2 x i8> [[YX]], <2 x i1> [[MASK]], i32 [[EVL]])
; CHECK-NEXT: ret <2 x i8> [[R]]
;
%xy = call <2 x i8> @llvm.vp.sub.v2i8(<2 x i8> %x, <2 x i8> %y, <2 x i1> %mask, i32 %evl)
; %yx = sub i8 %y, %x
%yx = call <2 x i8> @llvm.vp.sub.v2i8(<2 x i8> %y, <2 x i8> %x, <2 x i1> %mask, i32 %evl)
; %r = add i8 %xy, %yx
%r = call <2 x i8> @llvm.vp.add.v2i8(<2 x i8> %xy, <2 x i8> %yx, <2 x i1> %mask, i32 %evl)
ret <2 x i8> %r
}