cf112382dd
This completes the circle, complementing -lto-embed-bitcode (specifically, post-merge-pre-opt). Using -thinlto-assume-merged skips function importing. The index file is still needed for the other data it contains. Differential Revision: https://reviews.llvm.org/D87949
38 lines
2.2 KiB
LLVM
38 lines
2.2 KiB
LLVM
; REQUIRES: x86-registered-target
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; check the -lto-embed-bitcode=post-thinlto-merge does not perform optimizations
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; we expect 't1' - i.e start-lib1.ll's products - have both foo and bar defined,
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; but the bar call is still made from foo.
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; RUN: opt -module-summary %p/Inputs/start-lib1.ll -o %t1.bc
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; RUN: opt -module-summary %p/Inputs/start-lib2.ll -o %t2.bc
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; RUN: llvm-lto -thinlto -o %t.o %t1.bc %t2.bc
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; For the optimized case, we expect the inlining of foo into bar to happen.
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; RUN: %clang -target x86_64-unknown-linux-gnu -O2 -o %t-opt.o -x ir %t1.bc -c -fthinlto-index=%t.o.thinlto.bc -mllvm -lto-embed-bitcode=optimized
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; RUN: llvm-readelf -S %t-opt.o | FileCheck %s --check-prefixes=CHECK-ELF,CHECK-NO-CMD
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; RUN: llvm-objcopy --dump-section=.llvmbc=%t-embedded.bc %t-opt.o /dev/null
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; RUN: llvm-dis %t-embedded.bc -o - | FileCheck %s --check-prefixes=CHECK,CHECK-OPT
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; For the post-merge case, perform the embedded bitcode extraction, then
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; round-trip through compilation and ensure the objects are the same.
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; RUN: %clang -target x86_64-unknown-linux-gnu -O2 -o %t.o -x ir %t1.bc -c -fthinlto-index=%t.o.thinlto.bc -mllvm -lto-embed-bitcode=post-merge-pre-opt
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; RUN: llvm-readelf -S %t.o | FileCheck %s --check-prefixes=CHECK-ELF,CHECK-CMD
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; RUN: llvm-objcopy --dump-section=.llvmbc=%t-embedded.bc %t.o /dev/null
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; RUN: llvm-dis %t-embedded.bc -o - | FileCheck %s --check-prefixes=CHECK,CHECK-NOOPT
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; We should only need the index and the post-thinlto merged module to generate
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; the exact same .o as we originally did.
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; RUN: rm %t1.bc %t2.bc
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; RUN: %clang -target x86_64-unknown-linux-gnu -O2 -o %t-redo.o -x ir %t-embedded.bc -c -fthinlto-index=%t.o.thinlto.bc -mllvm -lto-embed-bitcode=post-merge-pre-opt -mllvm -thinlto-assume-merged
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; RUN: diff %t-redo.o %t.o
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; CHECK-ELF: .text PROGBITS 0000000000000000 [[#%x,OFF:]] [[#%x,SIZE:]] 00 AX 0
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; CHECK-ELF-NEXT: .llvmbc PROGBITS 0000000000000000 [[#%x,OFF:]] [[#%x,SIZE:]] 00 0
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; CHECK-ELF-CMD: .llvmcmd
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; CHECK-ELF-NO-CMD-NOT: .llvmcmd
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; CHECK: define void @foo()
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; CHECK-OPT-NEXT: ret void
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; CHECK-NOOPT-NEXT: call void @bar()
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; CHECK-NOOPT: define available_externally void @bar()
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; CHECK-NOOPT-NEXT: ret void
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