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[Polly] Do not introduce address space cast 

Do not introduce address space cast in IslNodeBuilder::preloadUnconditionally.

Differential Revision: https://reviews.llvm.org/D32581

llvm-svn: 301519
This commit is contained in:
Hongbin Zheng 2017-04-27 06:42:14 +00:00
parent 6f08789d30
commit 0f8f177682
2 changed files with 42 additions and 1 deletions
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3
polly/lib/CodeGen/IslNodeBuilder.cpp
View File

@ -1028,7 +1028,8 @@ Value *IslNodeBuilder::preloadUnconditionally(isl_set *AccessRange,
auto *Ptr = AddressValue;
auto Name = Ptr->getName();
Ptr = Builder.CreatePointerCast(Ptr, Ty->getPointerTo(), Name + ".cast");
auto AS = Ptr->getType()->getPointerAddressSpace();
Ptr = Builder.CreatePointerCast(Ptr, Ty->getPointerTo(AS), Name + ".cast");
PreloadVal = Builder.CreateLoad(Ptr, Name + ".load");
if (LoadInst *PreloadInst = dyn_cast<LoadInst>(PreloadVal))
PreloadInst->setAlignment(dyn_cast<LoadInst>(AccInst)->getAlignment());

40
polly/test/Isl/CodeGen/invariant_load_address_space.ll Normal file
View File

@ -0,0 +1,40 @@
; RUN: opt %loadPolly -polly-codegen -polly-invariant-load-hoisting=true -S < %s | FileCheck %s
;
; CHECK-LABEL: polly.preload.begin:
; CHECK-NEXT: %polly.access.B = getelementptr i32, i32 addrspace(1)* %B, i64 0
; CHECK-NOT: addrspacecast
; CHECK-NEXT: %polly.access.B.load = load i32, i32 addrspace(1)* %polly.access.B
;
; CHECK-LABEL: polly.stmt.bb2:
; CHECK-NEXT: %scevgep = getelementptr i32, i32* %A, i64 %polly.indvar
; CHECK-NEXT: store i32 %polly.access.B.load, i32* %scevgep, align 4
;
; void f(int *restrict A, int *restrict B) {
; for (int i = 0; i < 1024; i++)
; A[i] = *B;
; }
;
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
define void @f(i32* noalias %A, i32 addrspace(1)* noalias %B) {
bb:
br label %bb1
bb1: ; preds = %bb4, %bb
%indvars.iv = phi i64 [ %indvars.iv.next, %bb4 ], [ 0, %bb ]
%exitcond = icmp ne i64 %indvars.iv, 1024
br i1 %exitcond, label %bb2, label %bb5
bb2: ; preds = %bb1
%tmp = load i32, i32 addrspace(1)* %B, align 4
%tmp3 = getelementptr inbounds i32, i32* %A, i64 %indvars.iv
store i32 %tmp, i32* %tmp3, align 4
br label %bb4
bb4: ; preds = %bb2
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
br label %bb1
bb5: ; preds = %bb1
ret void
}