maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity

[NFC] [Fortran Support] Fix findFADGlobalNonAlloc pattern match comment 

llvm-svn: 303052
This commit is contained in:
Siddharth Bhat 2017-05-15 11:49:19 +00:00
parent 958b01aa69
commit aed4b5682d
1 changed files with 9 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
polly/include/polly/ScopBuilder.h
View File

@ -83,18 +83,20 @@ class ScopBuilder {
Value *findFADGlobalAlloc(MemAccInst Inst);
/// Try to match for the descriptor of a Fortran Array that has been declared
/// global, and is being accessed across modules.
/// global, has not been allocated, and is being allocated here.
///
/// Pattern match for "@globaldescriptor":
/// 1. %mem = load double*, double** bitcast (%"struct.array1_real(kind=8)"*
/// @globaldescriptor to double**), align 32
/// 1. %untypedmem = i8* @malloc(...)
///
/// 2. [%slot = getelementptr inbounds i8, i8* %mem, i64 <index>]
/// 2 is optional because if you are writing to the 0th index, you don't
/// 2. %typedmem = bitcast i8* %untypedmem to <memtype>*
///
/// 3. [%slot = getelementptr inbounds
/// <memtype>, <memtype>* %typedmem, i64 <index>]
/// 3 is optional because if you are writing to the 0th index, you don't
/// need a GEP.
///
/// 3.1 store/load <memtype> <val>, <memtype>* %slot, align 8
/// 3.2 store/load <memtype> <val>, <memtype>* %mem, align 8
/// 4.1 store/load <memtype> <val>, <memtype>* %slot, align 8
/// 4.2 store/load <memtype> <val>, <memtype>* %mem, align 8
///
/// @see polly::MemoryAccess, polly::ScopArrayInfo
///