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llvm-project/polly/test/ScopInfo/variant_base_pointer.ll

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[ScopDetection] Require LoadInst base pointers to be hoisted. Only when load-hoisted we can be sure the base pointer is invariant during the SCoP's execution. Most of the time it would be added to the required hoists for the alias checks anyway, except with -polly-ignore-aliasing, -polly-use-runtime-alias-checks=0 or if AliasAnalysis is already sure it doesn't alias with anything (for instance if there is no other pointer to alias with). Two more parts in Polly assume that this load-hoisting took place: - setNewAccessRelation() which contains an assert which tests this. - BlockGenerator which would use to the base ptr from the original code if not load-hoisted (if the access expression is regenerated) Differential Revision: https://reviews.llvm.org/D30694 llvm-svn: 297195
2017-03-08 04:28:43 +08:00
; RUN: opt %loadPolly -polly-ignore-aliasing -polly-invariant-load-hoisting=true -polly-scops -analyze < %s | FileCheck %s
; RUN: opt %loadPolly -polly-ignore-aliasing -polly-invariant-load-hoisting=true -polly-codegen -analyze < %s
[FIX] Do not hoist nested variant base pointers This fixes bug 25249. llvm-svn: 250958
2015-10-22 06:14:57 +08:00
;
[ScopDetection] Require LoadInst base pointers to be hoisted. Only when load-hoisted we can be sure the base pointer is invariant during the SCoP's execution. Most of the time it would be added to the required hoists for the alias checks anyway, except with -polly-ignore-aliasing, -polly-use-runtime-alias-checks=0 or if AliasAnalysis is already sure it doesn't alias with anything (for instance if there is no other pointer to alias with). Two more parts in Polly assume that this load-hoisting took place: - setNewAccessRelation() which contains an assert which tests this. - BlockGenerator which would use to the base ptr from the original code if not load-hoisted (if the access expression is regenerated) Differential Revision: https://reviews.llvm.org/D30694 llvm-svn: 297195
2017-03-08 04:28:43 +08:00
; %tmp is added to the list of required hoists by -polly-scops and just
; assumed to be hoisted. Only -polly-scops recognizes it to be unhoistable
; because ir depends on %call which cannot be executed speculatively.
;
; CHECK-NOT: Invariant Accesses:
[FIX] Do not hoist nested variant base pointers This fixes bug 25249. llvm-svn: 250958
2015-10-22 06:14:57 +08:00
;
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
; Function Attrs: nounwind uwtable
define void @cli_hex2int() {
entry:
br label %if.end
if.end: ; preds = %entry
%call = call i16** @__ctype_b_loc() #0
%tmp = load i16*, i16** %call, align 8
%arrayidx = getelementptr inbounds i16, i16* %tmp, i64 0
%tmp1 = load i16, i16* %arrayidx, align 2
Remove read-only statements from the SCoP We do not need to model read-only statements in the SCoP as they will not cause any side effects that are visible to the outside anyway. Removing them should safe us time and might even simplify the ASTs we generate. Differential Revision: http://reviews.llvm.org/D14272 llvm-svn: 251948
2015-11-04 00:54:49 +08:00
store i16 3, i16 *%arrayidx, align 2
[FIX] Do not hoist nested variant base pointers This fixes bug 25249. llvm-svn: 250958
2015-10-22 06:14:57 +08:00
br i1 false, label %if.then.2, label %if.end.3
if.then.2: ; preds = %if.end
br label %cleanup
if.end.3: ; preds = %if.end
br label %cleanup
cleanup: ; preds = %if.end.3, %if.then.2
ret void
}
; Function Attrs: nounwind readnone
declare i16** @__ctype_b_loc() #0
attributes #0 = { nounwind readnone }