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llvm-project/llvm/test/ThinLTO/X86/index-const-prop2.ll

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[ThinLTO] Internalize readonly globals An attempt to recommit r346584 after failure on OSX build bot. Fixed cache key computation in ThinLTOCodeGenerator and added test case llvm-svn: 347033
2018-11-16 15:08:00 +08:00
; Check constant propagation in thinlto combined summary. This allows us to do 2 things:
; 1. Internalize global definition which is not used externally if all accesses to it are read-only
; 2. Make a local copy of internal definition if all accesses to it are readonly. This allows constant
; folding it during optimziation phase.
; RUN: opt -module-summary %s -o %t1.bc
; RUN: opt -module-summary %p/Inputs/index-const-prop.ll -o %t2.bc
; RUN: llvm-lto2 run %t1.bc %t2.bc -save-temps \
; RUN: -r=%t2.bc,foo,pl \
; RUN: -r=%t2.bc,bar,pl \
; RUN: -r=%t2.bc,baz,pl \
; RUN: -r=%t2.bc,rand, \
; RUN: -r=%t2.bc,gBar,pl \
; RUN: -r=%t1.bc,main,plx \
[ThinLTO] Attempt to recommit r365188 after alignment fix llvm-svn: 365215
2019-07-05 23:25:05 +08:00
; RUN: -r=%t1.bc,main2,pl \
[ThinLTO] Internalize readonly globals An attempt to recommit r346584 after failure on OSX build bot. Fixed cache key computation in ThinLTOCodeGenerator and added test case llvm-svn: 347033
2018-11-16 15:08:00 +08:00
; RUN: -r=%t1.bc,foo, \
; RUN: -r=%t1.bc,bar, \
[ThinLTO] Attempt to recommit r365188 after alignment fix llvm-svn: 365215
2019-07-05 23:25:05 +08:00
; RUN: -r=%t1.bc,baz, \
[ThinLTO] Internalize readonly globals An attempt to recommit r346584 after failure on OSX build bot. Fixed cache key computation in ThinLTOCodeGenerator and added test case llvm-svn: 347033
2018-11-16 15:08:00 +08:00
; RUN: -r=%t1.bc,gBar, \
; RUN: -o %t3
; RUN: llvm-dis %t3.1.3.import.bc -o - | FileCheck %s --check-prefix=IMPORT
; RUN: llvm-dis %t3.1.5.precodegen.bc -o - | FileCheck %s --check-prefix=CODEGEN
; Now check that we won't internalize global (gBar) if it's externally referenced
; RUN: llvm-lto2 run %t1.bc %t2.bc -save-temps \
; RUN: -r=%t2.bc,foo,pl \
; RUN: -r=%t2.bc,bar,pl \
; RUN: -r=%t2.bc,baz,pl \
; RUN: -r=%t2.bc,rand, \
; RUN: -r=%t2.bc,gBar,plx \
; RUN: -r=%t1.bc,main,plx \
[ThinLTO] Attempt to recommit r365188 after alignment fix llvm-svn: 365215
2019-07-05 23:25:05 +08:00
; RUN: -r=%t1.bc,main2,pl \
[ThinLTO] Internalize readonly globals An attempt to recommit r346584 after failure on OSX build bot. Fixed cache key computation in ThinLTOCodeGenerator and added test case llvm-svn: 347033
2018-11-16 15:08:00 +08:00
; RUN: -r=%t1.bc,foo, \
; RUN: -r=%t1.bc,bar, \
[ThinLTO] Attempt to recommit r365188 after alignment fix llvm-svn: 365215
2019-07-05 23:25:05 +08:00
; RUN: -r=%t1.bc,baz, \
[ThinLTO] Internalize readonly globals An attempt to recommit r346584 after failure on OSX build bot. Fixed cache key computation in ThinLTOCodeGenerator and added test case llvm-svn: 347033
2018-11-16 15:08:00 +08:00
; RUN: -r=%t1.bc,gBar, \
[ThinLTO] Attempt to recommit r365188 after alignment fix llvm-svn: 365215
2019-07-05 23:25:05 +08:00
; RUN: -o %t4
; RUN: llvm-dis %t4.1.3.import.bc -o - | FileCheck %s --check-prefix=IMPORT2
[ThinLTO] Fix importing of writeonly variables in distributed ThinLTO Summary: D69561/dde5893 enabled importing of readonly variables with references, however, it introduced a bug relating to importing/internalization of writeonly variables with references. A fix for this was added in D70006/7f92d66. But this didn't work in distributed ThinLTO mode. The reason is that the fix (importing the writeonly var with a zeroinitializer) was only applied when there were references on the writeonly var summary. In distributed ThinLTO mode, where we only have a small slice of the index, we will not have the references on the importing side if we are not importing those referenced values. Rather than changing this handshaking (which will require a lot of other changes, since that's how we know what to import in the distributed backend clang invocation), we can simply always give the writeonly variable a zero initializer. Reviewers: evgeny777, steven_wu Subscribers: mehdi_amini, inglorion, hiraditya, dexonsmith, arphaman, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D70977
2019-12-04 04:22:51 +08:00
; Run again but with main2 exported instead of main to check that write only
; variables are optimized out.
[ThinLTO] Attempt to recommit r365188 after alignment fix llvm-svn: 365215
2019-07-05 23:25:05 +08:00
; RUN: llvm-lto2 run %t1.bc %t2.bc -save-temps \
; RUN: -r=%t2.bc,foo,pl \
; RUN: -r=%t2.bc,bar,pl \
; RUN: -r=%t2.bc,baz,pl \
; RUN: -r=%t2.bc,rand, \
; RUN: -r=%t2.bc,gBar,pl \
; RUN: -r=%t1.bc,main,pl \
; RUN: -r=%t1.bc,main2,plx \
; RUN: -r=%t1.bc,foo, \
; RUN: -r=%t1.bc,bar, \
; RUN: -r=%t1.bc,baz, \
; RUN: -r=%t1.bc,gBar, \
; RUN: -o %t5
[ThinLTO] Fix importing of writeonly variables in distributed ThinLTO Summary: D69561/dde5893 enabled importing of readonly variables with references, however, it introduced a bug relating to importing/internalization of writeonly variables with references. A fix for this was added in D70006/7f92d66. But this didn't work in distributed ThinLTO mode. The reason is that the fix (importing the writeonly var with a zeroinitializer) was only applied when there were references on the writeonly var summary. In distributed ThinLTO mode, where we only have a small slice of the index, we will not have the references on the importing side if we are not importing those referenced values. Rather than changing this handshaking (which will require a lot of other changes, since that's how we know what to import in the distributed backend clang invocation), we can simply always give the writeonly variable a zero initializer. Reviewers: evgeny777, steven_wu Subscribers: mehdi_amini, inglorion, hiraditya, dexonsmith, arphaman, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D70977
2019-12-04 04:22:51 +08:00
; RUN: llvm-dis %t5.1.3.import.bc -o - | FileCheck %s --check-prefix=IMPORT-WRITEONLY
[ThinLTO] Attempt to recommit r365188 after alignment fix llvm-svn: 365215
2019-07-05 23:25:05 +08:00
; RUN: llvm-dis %t5.1.5.precodegen.bc -o - | FileCheck %s --check-prefix=CODEGEN2
; Check that gFoo and gBar were eliminated from source module together
; with corresponsing stores
; RUN: llvm-dis %t5.2.5.precodegen.bc -o - | FileCheck %s --check-prefix=CODEGEN2-SRC
[ThinLTO] Internalize readonly globals An attempt to recommit r346584 after failure on OSX build bot. Fixed cache key computation in ThinLTOCodeGenerator and added test case llvm-svn: 347033
2018-11-16 15:08:00 +08:00
; IMPORT: @gFoo.llvm.0 = internal unnamed_addr global i32 1, align 4
; IMPORT-NEXT: @gBar = internal local_unnamed_addr global i32 2, align 4
ThinLTO: Do not import debug info for imported global constants It looks like this isn't necessary (in any tests I've done, it results in the global being described with no location or value in the imported side - while it's still fully described in the place it's imported from) & results in significant/pathological debug info growth to home these location-less global variable descriptions on the import side. This is a rather pressing/important issue to address - this regressed executable size for one example I'm looking at by 15%, object size is probably similar though I haven't measured it, and a 22x increase in the number of CUs in the cu_index in split DWARF DWP files, creating a similarly large regression in the time it takes llvm-symbolizer to run on such binaries. Reviewers: tejohnson, evgeny777 Differential Revision: https://reviews.llvm.org/D55309 llvm-svn: 348416
2018-12-06 05:42:17 +08:00
; IMPORT: !DICompileUnit({{.*}})
[ThinLTO] Internalize readonly globals An attempt to recommit r346584 after failure on OSX build bot. Fixed cache key computation in ThinLTOCodeGenerator and added test case llvm-svn: 347033
2018-11-16 15:08:00 +08:00
[ThinLTO] Fix importing of writeonly variables in distributed ThinLTO Summary: D69561/dde5893 enabled importing of readonly variables with references, however, it introduced a bug relating to importing/internalization of writeonly variables with references. A fix for this was added in D70006/7f92d66. But this didn't work in distributed ThinLTO mode. The reason is that the fix (importing the writeonly var with a zeroinitializer) was only applied when there were references on the writeonly var summary. In distributed ThinLTO mode, where we only have a small slice of the index, we will not have the references on the importing side if we are not importing those referenced values. Rather than changing this handshaking (which will require a lot of other changes, since that's how we know what to import in the distributed backend clang invocation), we can simply always give the writeonly variable a zero initializer. Reviewers: evgeny777, steven_wu Subscribers: mehdi_amini, inglorion, hiraditya, dexonsmith, arphaman, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D70977
2019-12-04 04:22:51 +08:00
; Write only variables are imported with a zero initializer.
; IMPORT-WRITEONLY: @gFoo.llvm.0 = internal unnamed_addr global i32 0
; IMPORT-WRITEONLY: @gBar = internal local_unnamed_addr global i32 0
[ThinLTO] Internalize readonly globals An attempt to recommit r346584 after failure on OSX build bot. Fixed cache key computation in ThinLTOCodeGenerator and added test case llvm-svn: 347033
2018-11-16 15:08:00 +08:00
; CODEGEN: i32 @main()
; CODEGEN-NEXT: ret i32 3
[ThinLTO] Drop dso_local if a GlobalVariable satisfies isDeclarationForLinker() dso_local leads to direct access even if the definition is not within this compilation unit (it is still in the same linkage unit). On ELF, such a relocation (e.g. R_X86_64_PC32) referencing a STB_GLOBAL STV_DEFAULT object can cause a linker error in a -shared link. If the linkage is changed to available_externally, the dso_local flag should be dropped, so that no direct access will be generated. The current behavior is benign, because -fpic does not assume dso_local (clang/lib/CodeGen/CodeGenModule.cpp:shouldAssumeDSOLocal). If we do that for -fno-semantic-interposition (D73865), there will be an R_X86_64_PC32 linker error without this patch. Reviewed By: tejohnson Differential Revision: https://reviews.llvm.org/D74751
2020-02-16 09:23:18 +08:00
; IMPORT2: @gBar = available_externally local_unnamed_addr global i32 2, align 4
[ThinLTO] Internalize readonly globals An attempt to recommit r346584 after failure on OSX build bot. Fixed cache key computation in ThinLTOCodeGenerator and added test case llvm-svn: 347033
2018-11-16 15:08:00 +08:00
[ThinLTO] Attempt to recommit r365188 after alignment fix llvm-svn: 365215
2019-07-05 23:25:05 +08:00
; CODEGEN2: i32 @main2
; CODEGEN2-NEXT: %1 = tail call i32 @rand()
; CODEGEN2-NEXT: %2 = tail call i32 @rand()
; CODEGEN2-NEXT: ret i32 0
; CODEGEN2-SRC: void @baz()
; CODEGEN2-SRC-NEXT: %1 = tail call i32 @rand()
; CODEGEN2-SRC-NEXT: %2 = tail call i32 @rand()
; CODEGEN2-SRC-NEXT: ret void
Reland "Change the X86 datalayout to add three address spaces for 32 bit signed, 32 bit unsigned, and 64 bit pointers." This reverts 57076d3199fc2b0af4a3736b7749dd5462cacda5. Original review at https://reviews.llvm.org/D64931. Review for added fix at https://reviews.llvm.org/D66843. llvm-svn: 371568
2019-09-11 07:15:38 +08:00
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
[ThinLTO] Internalize readonly globals An attempt to recommit r346584 after failure on OSX build bot. Fixed cache key computation in ThinLTOCodeGenerator and added test case llvm-svn: 347033
2018-11-16 15:08:00 +08:00
target triple = "x86_64-pc-linux-gnu"
; We should be able to link external definition of gBar to its declaration
@gBar = external global i32
define i32 @main() local_unnamed_addr {
%call = tail call i32 bitcast (i32 (...)* @foo to i32 ()*)()
%call1 = tail call i32 bitcast (i32 (...)* @bar to i32 ()*)()
%add = add nsw i32 %call1, %call
ret i32 %add
}
[ThinLTO] Attempt to recommit r365188 after alignment fix llvm-svn: 365215
2019-07-05 23:25:05 +08:00
define i32 @main2() local_unnamed_addr {
tail call void @baz()
ret i32 0
}
[ThinLTO] Internalize readonly globals An attempt to recommit r346584 after failure on OSX build bot. Fixed cache key computation in ThinLTOCodeGenerator and added test case llvm-svn: 347033
2018-11-16 15:08:00 +08:00
declare i32 @foo(...) local_unnamed_addr
declare i32 @bar(...) local_unnamed_addr
[ThinLTO] Attempt to recommit r365188 after alignment fix llvm-svn: 365215
2019-07-05 23:25:05 +08:00
declare void @baz() local_unnamed_addr