76a1c1d0ba
Summary: This patch adds support for including a full reference graph including call graph edges and other GV references in the summary. The reference graph edges can be used to make importing decisions without materializing any source modules, can be used in the plugin to make file staging decisions for distributed build systems, and is expected to have other uses. The call graph edges are recorded in each function summary in the bitcode via a list of <CalleeValueIds, StaticCount> tuples when no PGO data exists, or <CalleeValueId, StaticCount, ProfileCount> pairs when there is PGO, where the ValueId can be mapped to the function GUID via the ValueSymbolTable. In the function index in memory, the call graph edges reference the target via the CalleeGUID instead of the CalleeValueId. The reference graph edges are recorded in each summary record with a list of referenced value IDs, which can be mapped to value GUID via the ValueSymbolTable. Addtionally, a new summary record type is added to record references from global variable initializers. A number of bitcode records and data structures have been renamed to reflect the newly expanded scope of the summary beyond functions. More cleanup will follow. Reviewers: joker.eph, davidxl Subscribers: joker.eph, llvm-commits Differential Revision: http://reviews.llvm.org/D17212 llvm-svn: 263275
53 lines
1.6 KiB
LLVM
53 lines
1.6 KiB
LLVM
; RUN: llvm-as -function-summary < %s | llvm-bcanalyzer -dump | FileCheck %s -check-prefix=BC
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; Check for function summary block/records.
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; Check the value ids in the function summary entries against the
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; same in the ValueSumbolTable, to ensure the ordering is stable.
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; Also check the linkage field on the summary entries.
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; BC: <GLOBALVAL_SUMMARY_BLOCK
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; BC-NEXT: <PERMODULE {{.*}} op0=1 op1=0
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; BC-NEXT: <PERMODULE {{.*}} op0=2 op1=0
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; BC-NEXT: <PERMODULE {{.*}} op0=4 op1=3
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; BC-NEXT: </GLOBALVAL_SUMMARY_BLOCK
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; BC-NEXT: <VALUE_SYMTAB
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; BC-NEXT: <FNENTRY {{.*}} op0=1 {{.*}}> record string = 'foo'
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; BC-NEXT: <FNENTRY {{.*}} op0=2 {{.*}}> record string = 'bar'
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; BC-NEXT: <FNENTRY {{.*}} op0=4 {{.*}}> record string = 'f'
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; RUN: llvm-as -function-summary < %s | llvm-dis | FileCheck %s
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; Check that this round-trips correctly.
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; ModuleID = '<stdin>'
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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; CHECK: define i32 @foo()
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; Function Attrs: nounwind uwtable
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define i32 @foo() #0 {
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entry:
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ret i32 1
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}
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; CHECK: define i32 @bar(i32 %x)
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; Function Attrs: nounwind uwtable
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define i32 @bar(i32 %x) #0 {
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entry:
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ret i32 %x
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}
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; Check an anonymous function as well, since in that case only the alias
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; ends up in the value symbol table and having a summary.
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@f = alias void (), void ()* @0 ; <void ()*> [#uses=0]
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@h = external global void ()* ; <void ()*> [#uses=0]
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define internal void @0() nounwind {
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entry:
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store void()* @0, void()** @h
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br label %return
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return: ; preds = %entry
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ret void
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}
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