mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-24 03:33:20 +01:00
f4af38fa5f
Summary: This is largely NFC*, in preparation for utilizing ProfileSummaryInfo and BranchFrequencyInfo analyses. In this patch I am only doing the splitting for the New PM, but I can do the same for the legacy PM as a follow-on if this looks good. *Not NFC since for partial unrolling we lose the updates done to the loop traversal (adding new sibling and child loops) - according to Chandler this is not very useful for partial unrolling, but it also means that the debugging flag -unroll-revisit-child-loops no longer works for partial unrolling. Reviewers: chandlerc Subscribers: mehdi_amini, mzolotukhin, eraman, llvm-commits Differential Revision: https://reviews.llvm.org/D36157 llvm-svn: 309886
49 lines
1.3 KiB
LLVM
49 lines
1.3 KiB
LLVM
; RUN: opt < %s -loop-unroll -S | FileCheck %s
|
|
; RUN: opt < %s -passes='require<opt-remark-emit>,unroll' -S | FileCheck %s
|
|
|
|
|
|
; This should not unroll since the address of the loop header is taken.
|
|
|
|
; CHECK-LABEL: @test1(
|
|
; CHECK: store i8* blockaddress(@test1, %l1), i8** %P
|
|
; CHECK: l1:
|
|
; CHECK-NEXT: phi i32
|
|
; rdar://8287027
|
|
define i32 @test1(i8** %P) nounwind ssp {
|
|
entry:
|
|
store i8* blockaddress(@test1, %l1), i8** %P
|
|
br label %l1
|
|
|
|
l1: ; preds = %l1, %entry
|
|
%x.0 = phi i32 [ 0, %entry ], [ %inc, %l1 ]
|
|
%inc = add nsw i32 %x.0, 1
|
|
%exitcond = icmp eq i32 %inc, 3
|
|
br i1 %exitcond, label %l2, label %l1
|
|
|
|
l2: ; preds = %l1
|
|
ret i32 0
|
|
}
|
|
|
|
; This should not unroll since the call is 'noduplicate'.
|
|
|
|
; CHECK-LABEL: @test2(
|
|
define i32 @test2(i8** %P) nounwind ssp {
|
|
entry:
|
|
br label %l1
|
|
|
|
l1: ; preds = %l1, %entry
|
|
%x.0 = phi i32 [ 0, %entry ], [ %inc, %l1 ]
|
|
; CHECK: call void @f()
|
|
; CHECK-NOT: call void @f()
|
|
call void @f() noduplicate
|
|
%inc = add nsw i32 %x.0, 1
|
|
%exitcond = icmp eq i32 %inc, 3
|
|
br i1 %exitcond, label %l2, label %l1
|
|
|
|
l2: ; preds = %l1
|
|
ret i32 0
|
|
; CHECK: }
|
|
}
|
|
|
|
declare void @f()
|