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hanchenye-llvm-project/polly/test/ScopInfo/invariant_load_ptr_ptr_noal...

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Do not detect Scops with only one loop. If a region does not have more than one loop, we do not identify it as a Scop in ScopDetection. The main optimizations Polly is currently performing (tiling, preparation for outer-loop vectorization and loop fusion) are unlikely to have a positive impact on individual loops. In some cases, Polly's run-time alias checks or conditional hoisting may still have a positive impact, but those are mostly enabling transformations which LLVM already performs for individual loops. As we do not focus on individual loops, we leave them untouched to not introduce compile time regressions and execution time noise. This results in good compile time reduction (oourafft: -73.99%, smg2000: -56.25%). Contributed-by: Pratik Bhatu <cs12b1010@iith.ac.in> Reviewers: grosser Differential Revision: http://reviews.llvm.org/D12268 llvm-svn: 246161
2015-08-28 00:55:18 +08:00
; RUN: opt %loadPolly -tbaa -polly-scops -polly-ignore-aliasing \
; RUN: -polly-detect-unprofitable -analyze < %s | FileCheck %s
Link ScopArrayInfo objects We will record if a SAI is the base of another SAI or derived from it. This will allow to reason about indirect base pointers later on and allows a clearer picture of indirection also in the SCoP dump. llvm-svn: 245584
2015-08-21 02:04:22 +08:00
;
; CHECK: Arrays {
; CHECK: i32** MemRef_A[*][8]
; CHECK: i32* MemRef_tmp3[*][8] [BasePtrOrigin: MemRef_A]
; CHECK: i32 MemRef_tmp5[*][4] [BasePtrOrigin: MemRef_tmp3]
; CHECK: }
;
; CHECK: Arrays (Bounds as pw_affs) {
; CHECK: i32** MemRef_A[*][ { [] -> [(8)] } ]
; CHECK: i32* MemRef_tmp3[*][ { [] -> [(8)] } ] [BasePtrOrigin: MemRef_A]
; CHECK: i32 MemRef_tmp5[*][ { [] -> [(4)] } ] [BasePtrOrigin: MemRef_tmp3]
; CHECK: }
;
; void f(int ***A) {
; for (int i = 0; i < 1024; i++)
; A[42][32][i] = 0;
; }
;
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
define void @f(i32*** %A) {
bb:
br label %bb1
bb1: ; preds = %bb7, %bb
%indvars.iv = phi i64 [ %indvars.iv.next, %bb7 ], [ 0, %bb ]
%exitcond = icmp ne i64 %indvars.iv, 1024
br i1 %exitcond, label %bb2, label %bb8
bb2: ; preds = %bb1
%tmp = getelementptr inbounds i32**, i32*** %A, i64 42
%tmp3 = load i32**, i32*** %tmp, align 8, !tbaa !1
%tmp4 = getelementptr inbounds i32*, i32** %tmp3, i64 32
%tmp5 = load i32*, i32** %tmp4, align 8, !tbaa !1
%tmp6 = getelementptr inbounds i32, i32* %tmp5, i64 %indvars.iv
store i32 0, i32* %tmp6, align 4, !tbaa !5
br label %bb7
bb7: ; preds = %bb2
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
br label %bb1
bb8: ; preds = %bb1
ret void
}
!0 = !{!"clang version 3.8.0 (http://llvm.org/git/clang.git 9e282ff441e7a367dc711e41fd19d27ffc0f78d6)"}
!1 = !{!2, !2, i64 0}
!2 = !{!"any pointer", !3, i64 0}
!3 = !{!"omnipotent char", !4, i64 0}
!4 = !{!"Simple C/C++ TBAA"}
!5 = !{!6, !6, i64 0}
!6 = !{!"int", !3, i64 0}