bf6124580d
Add options -[no-]offload-lto and -foffload-lto=[thin,full] for controlling LTO for offload compilation. Allow LTO for AMDGPU target. AMDGPU target does not support codegen of object files containing call of external functions, therefore the LLVM module passed to AMDGPU backend needs to contain definitions of all the callees. An LLVM option is added to allow function importer to import functions with noinline attribute. HIP toolchain passes proper LLVM options to lld to make sure function importer imports definitions of all the callees. Reviewed by: Teresa Johnson, Artem Belevich Differential Revision: https://reviews.llvm.org/D99683
40 lines
1.6 KiB
LLVM
40 lines
1.6 KiB
LLVM
; Do setup work for all below tests: generate bitcode and combined index
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; RUN: opt -module-summary %s -o %t.bc
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; RUN: opt -module-summary %p/Inputs/adjustable_threshold.ll -o %t2.bc
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; RUN: llvm-lto -thinlto -o %t3 %t.bc %t2.bc
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; Test import with default progressive instruction factor
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; RUN: opt -function-import -summary-file %t3.thinlto.bc %t.bc -import-instr-limit=10 -S | FileCheck %s --check-prefix=INSTLIM-DEFAULT
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; INSTLIM-DEFAULT: call void @staticfunc2.llvm.
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; Test import with a reduced progressive instruction factor
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; RUN: opt -function-import -summary-file %t3.thinlto.bc %t.bc -import-instr-limit=10 -import-instr-evolution-factor=0.5 -S | FileCheck %s --check-prefix=INSTLIM-PROGRESSIVE
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; INSTLIM-PROGRESSIVE-NOT: call void @staticfunc
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; Test force import all
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; RUN: opt -function-import -summary-file %t3.thinlto.bc %t.bc \
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; RUN: -import-instr-limit=1 -force-import-all -S \
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; RUN: | FileCheck %s --check-prefix=IMPORTALL
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; IMPORTALL-DAG: define available_externally void @globalfunc1()
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; IMPORTALL-DAG: define available_externally void @trampoline()
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; IMPORTALL-DAG: define available_externally void @largefunction()
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; IMPORTALL-DAG: define available_externally hidden void @staticfunc2.llvm.0()
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; IMPORTALL-DAG: define available_externally void @globalfunc2()
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declare void @globalfunc1()
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declare void @globalfunc2()
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define void @entry() {
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entry:
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; Call site are processed in reversed order!
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; On the direct call, we reconsider @largefunction with a higher threshold and
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; import it
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call void @globalfunc2()
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; When importing globalfunc1, the threshold was limited and @largefunction was
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; not imported.
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call void @globalfunc1()
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ret void
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}
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