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llvm-project/llvm/test/Transforms/Inline/last-call-no-bonus.ll

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[Inliner] Do not apply any bonus for cold callsites. Summary: Inlining threshold is increased by application of bonuses when the callee has a single reachable basic block or is rich in vector instructions. Similarly, inlining cost is reduced by applying a large bonus when the last call to a static function is considered for inlining. This patch disables the application of these bonuses when the callsite or the callee is cold. The intention here is to prevent a large cold callsite from being inlined to a non-cold caller that could prevent the caller from being inlined. This is especially important when the cold callsite is a last call to a static since the associated bonus is very high. Reviewers: chandlerc, davidxl Subscribers: danielcdh, llvm-commits Differential Revision: https://reviews.llvm.org/D35823 llvm-svn: 309441
2017-07-29 05:47:36 +08:00
; This code is virtually identical to last-call-bonus.ll, but the callsites
; to the internal functions are cold, thereby preventing the last call to
; static bonus from being applied.
[PM] Split LoopUnrollPass and make partial unroller a function pass 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
2017-08-03 04:35:29 +08:00
; RUN: opt < %s -passes='function(require<opt-remark-emit>,unroll),require<profile-summary>,cgscc(inline)' -unroll-threshold=15000 -inline-threshold=250 -S | FileCheck %s
[Inliner] Do not apply any bonus for cold callsites. Summary: Inlining threshold is increased by application of bonuses when the callee has a single reachable basic block or is rich in vector instructions. Similarly, inlining cost is reduced by applying a large bonus when the last call to a static function is considered for inlining. This patch disables the application of these bonuses when the callsite or the callee is cold. The intention here is to prevent a large cold callsite from being inlined to a non-cold caller that could prevent the caller from being inlined. This is especially important when the cold callsite is a last call to a static since the associated bonus is very high. Reviewers: chandlerc, davidxl Subscribers: danielcdh, llvm-commits Differential Revision: https://reviews.llvm.org/D35823 llvm-svn: 309441
2017-07-29 05:47:36 +08:00
; CHECK-LABEL: define internal i32 @baz
define internal i32 @baz() {
entry:
br label %bb1
bb1:
%ind = phi i32 [ 0, %entry ], [ %inc, %bb1 ]
call void @extern()
%inc = add nsw i32 %ind, 1
%cmp = icmp sgt i32 %inc, 510
br i1 %cmp, label %ret, label %bb1
ret:
ret i32 0
}
; CHECK-LABEL: define internal i32 @bar
define internal i32 @bar(i1 %b) {
entry:
br label %bb1
bb1:
%ind = phi i32 [ 0, %entry ], [ %inc, %bb1 ]
call void @extern()
%inc = add nsw i32 %ind, 1
%cmp = icmp sgt i32 %inc, 510
br i1 %cmp, label %for.exit, label %bb1
for.exit:
br i1 %b, label %bb2, label %ret, !prof !0
bb2:
; CHECK: call i32 @baz
call i32 @baz()
br label %ret
ret:
ret i32 0
}
; CHECK-LABEL: define i32 @foo
define i32 @foo(i1 %b) {
entry:
br i1 %b, label %bb1, label %ret, !prof !0
bb1:
; CHECK: call i32 @bar
call i32 @bar(i1 %b)
br label %ret
ret:
ret i32 0
}
declare void @extern()
!0 = !{!"branch_weights", i32 1, i32 2500}