https://llvm.org/bugs/show_bug.cgi?id=27559
Bug ID: 27559
Summary: Generate conjunction or disjunction condition to
reduce ISL Ast duplication
Product: Polly
Version: unspecified
Hardware: PC
OS: Windows NT
Status: NEW
Severity: normal
Priority: P
Component: isl
Assignee: polly-...@googlegroups.com
Reporter: zi...@codeaurora.org
CC: llvm-bugs@lists.llvm.org
Classification: Unclassified
The testcase is a unit test:
test/Isl/CodeGen/pointer-type-pointer-type-comparison.ll
produced Isl AST:
; CHECK: if (Q >= P + 1) {
; CHECK: for (int c0 = 0; c0 < N; c0 += 1)
; CHECK: Stmt_store(c0);
; CHECK: } else if (P >= Q + 1)
; CHECK: for (int c0 = 0; c0 < N; c0 += 1)
; CHECK: Stmt_store(c0);
; CHECK: }
In some cases the duplication is severe and it end up impacting compile-time
and code size (LLVM optimization will not CSE the code).
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