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13f5c24893
Summary: Currently the ThinLTO minimized bitcode file only strip the debug info, but there is still a lot of information in the minimized bit code file that will be not used for thin linker. In this patch, most of the extra information is striped to reduce the minimized bitcode file. Now only ModuleVersion, ModuleInfo, ModuleGlobalValueSummary, ModuleHash, Symtab and Strtab are left. Now the minimized bitcode file size is reduced to 15%-30% of the debug info stripped bitcode file size. Reviewers: danielcdh, tejohnson, pcc Reviewed By: pcc Subscribers: mehdi_amini, aprantl, inglorion, eraman, llvm-commits Differential Revision: https://reviews.llvm.org/D35334 llvm-svn: 308760
45 lines
1.6 KiB
LLVM
45 lines
1.6 KiB
LLVM
; Generate bitcode files with summary, as well as minimized bitcode without
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; the debug metadata for the thin link.
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; RUN: opt -thinlto-bc -thin-link-bitcode-file=%t2 -o %t %s
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; RUN: llvm-modextract -b -n 0 -o %t0.bc %t
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; RUN: llvm-modextract -b -n 1 -o %t1.bc %t
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; RUN: llvm-modextract -b -n 0 -o %t0.thinlink.bc %t2
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; RUN: llvm-modextract -b -n 1 -o %t1.thinlink.bc %t2
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; RUN: not llvm-modextract -b -n 2 -o - %t 2>&1 | FileCheck --check-prefix=ERROR %s
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; RUN: llvm-dis -o - %t0.bc | FileCheck --check-prefix=M0 %s
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; RUN: llvm-dis -o - %t1.bc | FileCheck --check-prefix=M1 %s
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; RUN: llvm-bcanalyzer -dump %t0.bc | FileCheck --check-prefix=BCA0 %s
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; RUN: llvm-bcanalyzer -dump %t1.bc | FileCheck --check-prefix=BCA1 %s
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; Make sure the combined index files produced by both the normal and the
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; thin link bitcode files are identical
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; RUN: llvm-lto -thinlto -o %t3 %t0.bc
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; Copy the minimized bitcode to the regular bitcode path so the module
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; paths in the index are the same.
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; RUN: cp %t0.thinlink.bc %t0.bc
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; RUN: llvm-lto -thinlto -o %t4 %t0.bc
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; RUN: diff %t3.thinlto.bc %t4.thinlto.bc
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; ERROR: llvm-modextract: error: module index out of range; bitcode file contains 2 module(s)
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; BCA0: <GLOBALVAL_SUMMARY_BLOCK
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; BCA1: <FULL_LTO_GLOBALVAL_SUMMARY_BLOCK
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; 16 = not eligible to import
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; BCA1: <PERMODULE_GLOBALVAR_INIT_REFS {{.*}} op1=16
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; BCA1-NOT: <GLOBALVAL_SUMMARY_BLOCK
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$g = comdat any
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; M0: @g = external global i8{{$}}
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; M1: @g = global i8 42, comdat, !type !0
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@g = global i8 42, comdat, !type !0
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; M0: define i8* @f()
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; M1-NOT: @f()
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define i8* @f() {
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ret i8* @g
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}
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; M1: !0 = !{i32 0, !"typeid"}
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!0 = !{i32 0, !"typeid"}
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