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2d3eb26eeb
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 llvm-svn: 300464
143 lines
4.8 KiB
LLVM
143 lines
4.8 KiB
LLVM
; Test to check both the callgraph and refgraph in summary
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; RUN: opt -module-summary %s -o %t.o
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; RUN: llvm-bcanalyzer -dump %t.o | FileCheck %s
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; CHECK: <SOURCE_FILENAME
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; "bar"
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; CHECK-NEXT: <GLOBALVAR {{.*}} op0=0 op1=3
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; "globalvar"
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; CHECK-NEXT: <GLOBALVAR {{.*}} op0=3 op1=9
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; "func"
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; CHECK-NEXT: <FUNCTION op0=12 op1=4
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; "func2"
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; CHECK-NEXT: <FUNCTION op0=16 op1=5
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; "foo"
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; CHECK-NEXT: <FUNCTION op0=21 op1=3
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; "func3"
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; CHECK-NEXT: <FUNCTION op0=24 op1=5
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; "W"
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; CHECK-NEXT: <FUNCTION op0=29 op1=1
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; "X"
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; CHECK-NEXT: <FUNCTION op0=30 op1=1
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; "Y"
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; CHECK-NEXT: <FUNCTION op0=31 op1=1
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; "Z"
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; CHECK-NEXT: <FUNCTION op0=32 op1=1
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; "llvm.ctpop.i8"
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; CHECK-NEXT: <FUNCTION op0=33 op1=13
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; "main"
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; CHECK-NEXT: <FUNCTION op0=46 op1=4
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; See if the calls and other references are recorded properly using the
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; expected value id and other information as appropriate (callsite cout
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; for calls). Use different linkage types for the various test cases to
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; distinguish the test cases here (op1 contains the linkage type).
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; Note that op3 contains the # non-call references.
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; This also ensures that we didn't include a call or reference to intrinsic
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; llvm.ctpop.i8.
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; CHECK: <GLOBALVAL_SUMMARY_BLOCK
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; Function main contains call to func, as well as address reference to func:
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; op0=main op4=func op5=func
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; CHECK-DAG: <PERMODULE {{.*}} op0=11 op1=0 {{.*}} op3=1 op4=2 op5=2/>
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; Function W contains a call to func3 as well as a reference to globalvar:
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; op0=W op4=globalvar op5=func3
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; CHECK-DAG: <PERMODULE {{.*}} op0=6 op1=5 {{.*}} op3=1 op4=1 op5=5/>
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; Function X contains call to foo, as well as address reference to foo
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; which is in the same instruction as the call:
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; op0=X op4=foo op5=foo
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; CHECK-DAG: <PERMODULE {{.*}} op0=7 op1=1 {{.*}} op3=1 op4=4 op5=4/>
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; Function Y contains call to func2, and ensures we don't incorrectly add
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; a reference to it when reached while earlier analyzing the phi using its
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; return value:
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; op0=Y op4=func2
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; CHECK-DAG: <PERMODULE {{.*}} op0=8 op1=8 {{.*}} op3=0 op4=3/>
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; Function Z contains call to func2, and ensures we don't incorrectly add
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; a reference to it when reached while analyzing subsequent use of its return
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; value:
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; op0=Z op4=func2
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; CHECK-DAG: <PERMODULE {{.*}} op0=9 op1=3 {{.*}} op3=0 op4=3/>
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; Variable bar initialization contains address reference to func:
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; op0=bar op2=func
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; CHECK-DAG: <PERMODULE_GLOBALVAR_INIT_REFS {{.*}} op0=0 op1=0 op2=2/>
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; CHECK: </GLOBALVAL_SUMMARY_BLOCK>
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; CHECK: <STRTAB_BLOCK
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; CHECK-NEXT: blob data = 'barglobalvarfuncfunc2foofunc3WXYZllvm.ctpop.i8main'
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; ModuleID = 'thinlto-function-summary-refgraph.ll'
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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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@bar = global void (...)* bitcast (void ()* @func to void (...)*), align 8
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@globalvar = global i32 0, align 4
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declare void @func() #0
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declare i32 @func2(...) #1
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declare void @foo(i8* %F) #0
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declare i32 @func3(i32* dereferenceable(4)) #2
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; Function Attrs: nounwind uwtable
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define weak_odr void @W() #0 {
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entry:
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%call = tail call i32 @func3(i32* nonnull dereferenceable(4) @globalvar)
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ret void
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}
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; Function Attrs: nounwind uwtable
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define available_externally void @X() #0 {
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entry:
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call void @foo(i8* bitcast (void (i8*)* @foo to i8*))
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ret void
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}
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; Function Attrs: nounwind uwtable
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define private i32 @Y(i32 %i) #0 {
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entry:
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%cmp3 = icmp slt i32 %i, 10
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br i1 %cmp3, label %while.body.preheader, label %while.end
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while.body.preheader: ; preds = %entry
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br label %while.body
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while.body: ; preds = %while.body.preheader, %while.body
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%j.05 = phi i32 [ %add, %while.body ], [ 0, %while.body.preheader ]
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%i.addr.04 = phi i32 [ %inc, %while.body ], [ %i, %while.body.preheader ]
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%inc = add nsw i32 %i.addr.04, 1
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%call = tail call i32 (...) @func2() #2
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%add = add nsw i32 %call, %j.05
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%exitcond = icmp eq i32 %inc, 10
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br i1 %exitcond, label %while.end.loopexit, label %while.body
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while.end.loopexit: ; preds = %while.body
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%add.lcssa = phi i32 [ %add, %while.body ]
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br label %while.end
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while.end: ; preds = %while.end.loopexit, %entry
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%j.0.lcssa = phi i32 [ 0, %entry ], [ %add.lcssa, %while.end.loopexit ]
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ret i32 %j.0.lcssa
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}
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; Function Attrs: nounwind uwtable
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define linkonce_odr i32 @Z() #0 {
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entry:
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%call = tail call i32 (...) @func2() #2
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ret i32 %call
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}
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declare i8 @llvm.ctpop.i8(i8)
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; Function Attrs: nounwind uwtable
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define i32 @main() #0 {
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entry:
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%retval = alloca i32, align 4
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%foo = alloca void (...)*, align 8
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store i32 0, i32* %retval, align 4
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store void (...)* bitcast (void ()* @func to void (...)*), void (...)** %foo, align 8
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%0 = load void (...)*, void (...)** %foo, align 8
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call void (...) %0()
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call void @func()
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call i8 @llvm.ctpop.i8( i8 10 )
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ret i32 0
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}
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