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6163b4af73
Add a top-level STRTAB block containing a string table blob, and start storing strings for module codes FUNCTION, GLOBALVAR, ALIAS, IFUNC and COMDAT in the string table. This change allows us to share names between globals and comdats as well as between modules, and improves the efficiency of loading bitcode files by no longer using a bit encoding for symbol names. Once we start writing the irsymtab to the bitcode file we will also be able to share strings between it and the module. On my machine, link time for Chromium for Linux with ThinLTO decreases by about 7% for no-op incremental builds or about 1% for full builds. Total bitcode file size decreases by about 3%. As discussed on llvm-dev: http://lists.llvm.org/pipermail/llvm-dev/2017-April/111732.html Differential Revision: https://reviews.llvm.org/D31838 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300464 91177308-0d34-0410-b5e6-96231b3b80d8
73 lines
2.0 KiB
LLVM
73 lines
2.0 KiB
LLVM
; RUN: opt -name-anon-globals -module-summary < %s | llvm-bcanalyzer -dump | FileCheck %s -check-prefix=BC
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; RUN: opt -passes=name-anon-globals -module-summary < %s | llvm-bcanalyzer -dump | FileCheck %s -check-prefix=BC
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; Check for summary block/records.
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; BC: <SOURCE_FILENAME
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; "h"
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; BC-NEXT: <GLOBALVAR {{.*}} op0=0 op1=1
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; "foo"
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; BC-NEXT: <FUNCTION op0=1 op1=3
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; "bar"
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; BC-NEXT: <FUNCTION op0=4 op1=3
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; "anon.[32 chars].0"
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; BC-NEXT: <FUNCTION op0=7 op1=39
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; "variadic"
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; BC-NEXT: <FUNCTION op0=46 op1=8
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; "f"
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; BC-NEXT: <ALIAS op0=54 op1=1
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; BC: <GLOBALVAL_SUMMARY_BLOCK
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; BC-NEXT: <VERSION
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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=3 op1=7
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; BC-NEXT: <PERMODULE {{.*}} op0=4 op1=16
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; BC-NEXT: <ALIAS {{.*}} op0=5 op1=0 op2=3
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; BC-NEXT: </GLOBALVAL_SUMMARY_BLOCK
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; BC: <STRTAB_BLOCK
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; BC-NEXT: blob data = 'hfoobaranon.{{................................}}.0variadicf'
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; RUN: opt -name-anon-globals -module-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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; FIXME: Anonymous function and alias not currently in summary until
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; follow on fixes to rename anonymous globals and emit alias summary
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; entries are committed.
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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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define i32 @variadic(...) {
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ret i32 42
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}
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