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9e5d6805dd
Summary: Currently the block frequency analysis is an approximation for irreducible loops. The new irreducible loop metadata is used to annotate the irreducible loop headers with their header weights based on the PGO profile (currently this is approximated to be evenly weighted) and to help improve the accuracy of the block frequency analysis for irreducible loops. This patch is a basic support for this. Reviewers: davidxl Reviewed By: davidxl Subscribers: mehdi_amini, llvm-commits, eraman Differential Revision: https://reviews.llvm.org/D39028 llvm-svn: 317278
59 lines
2.0 KiB
LLVM
59 lines
2.0 KiB
LLVM
; Do setup work for all below tests: generate bitcode and combined index
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; RUN: opt -module-summary %s -o %t.bc -bitcode-mdindex-threshold=0
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; RUN: opt -module-summary %p/Inputs/lazyload_metadata.ll -o %t2.bc -bitcode-mdindex-threshold=0
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; RUN: llvm-lto -thinlto-action=thinlink -o %t3.bc %t.bc %t2.bc
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; REQUIRES: asserts
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; Check that importing @globalfunc1 does not trigger loading all the global
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; metadata for @globalfunc2 and @globalfunc3
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; RUN: llvm-lto -thinlto-action=import %t2.bc -thinlto-index=%t3.bc \
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; RUN: -o /dev/null -stats \
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; RUN: 2>&1 | FileCheck %s -check-prefix=LAZY
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; LAZY: 55 bitcode-reader - Number of Metadata records loaded
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; LAZY: 2 bitcode-reader - Number of MDStrings loaded
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; RUN: llvm-lto -thinlto-action=import %t2.bc -thinlto-index=%t3.bc \
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; RUN: -o /dev/null -disable-ondemand-mds-loading -stats \
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; RUN: 2>&1 | FileCheck %s -check-prefix=NOTLAZY
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; NOTLAZY: 64 bitcode-reader - Number of Metadata records loaded
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; NOTLAZY: 7 bitcode-reader - Number of MDStrings loaded
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx10.11.0"
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define void @globalfunc1(i32 %arg) {
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%x = call i1 @llvm.type.test(i8* undef, metadata !"typeid1")
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%tmp = add i32 %arg, 0, !metadata !2
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ret void
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}
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; We need two functions here that will both reference the same metadata.
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; This is to force the metadata to be emitted in the global metadata block and
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; not in the function specific metadata.
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; These function are not imported and so we don't want to load their metadata.
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define void @globalfunc2(i32 %arg) {
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%x = call i1 @llvm.type.test(i8* undef, metadata !"typeid1")
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%tmp = add i32 %arg, 0, !metadata !1
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ret void
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}
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define void @globalfunc3(i32 %arg) {
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%tmp = add i32 %arg, 0, !metadata !1
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ret void
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}
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declare i1 @llvm.type.test(i8* %ptr, metadata %bitset) nounwind readnone
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!1 = !{!2, !3, !4, !5, !6, !7, !8, !9}
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!2 = !{!"Hello World"}
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!3 = !{!"3"}
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!4 = !{!"4"}
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!5 = !{!"5"}
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!6 = !{!9}
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!7 = !{!"7"}
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!8 = !{!"8"}
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!9 = !{!6}
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