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6471f6664d
Pre-instrumentation inline (pre-inliner) greatly improves the IR instrumentation code performance, among other benefits. One issue of the pre-inliner is it can introduce CFG-mismatch for COMDAT functions. This is due to the fact that the same COMDAT function may have different early inline decisions across different modules -- that means different copies of COMDAT functions will have different CFG checksum. In this patch, we propose a partially renaming the COMDAT group and its member function/variable so we have different profile counter for each version. We will post-fix the COMDAT function and the group name with its FunctionHash. Differential Revision: http://reviews.llvm.org/D22600 llvm-svn: 276673
60 lines
2.0 KiB
LLVM
60 lines
2.0 KiB
LLVM
; RUN: opt < %s -mtriple=x86_64-unknown-linux -pgo-instr-gen -S | FileCheck --check-prefixes COMMON,ELFONLY %s
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; RUN: opt < %s -mtriple=x86_64-unknown-linux -passes=pgo-instr-gen -S | FileCheck --check-prefixes COMMON,ELFONLY %s
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; RUN: opt < %s -mtriple=x86_64-pc-win32-coff -pgo-instr-gen -S | FileCheck --check-prefixes COMMON,COFFONLY %s
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; RUN: opt < %s -mtriple=x86_64-pc-win32-coff -passes=pgo-instr-gen -S | FileCheck --check-prefixes COMMON,COFFONLY %s
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; Rename Comdat group and its function.
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$f = comdat any
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; COMMON: $f.[[SINGLEBB_HASH:[0-9]+]] = comdat any
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define linkonce_odr void @f() comdat($f) {
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ret void
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}
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; Not rename Comdat with right linkage.
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$nf = comdat any
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; COMMON: $nf = comdat any
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define void @nf() comdat($nf) {
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ret void
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}
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; Not rename Comdat with variable members.
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$f_with_var = comdat any
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; COMMON: $f_with_var = comdat any
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@var = global i32 0, comdat($f_with_var)
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define linkonce_odr void @f_with_var() comdat($f_with_var) {
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%tmp = load i32, i32* @var, align 4
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%inc = add nsw i32 %tmp, 1
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store i32 %inc, i32* @var, align 4
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ret void
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}
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; Not rename Comdat with multiple functions.
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$tf = comdat any
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; COMMON: $tf = comdat any
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define linkonce void @tf() comdat($tf) {
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ret void
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}
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define linkonce void @tf2() comdat($tf) {
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ret void
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}
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; Renaming Comdat with aliases.
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$f_with_alias = comdat any
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; COMMON: $f_with_alias.[[SINGLEBB_HASH]] = comdat any
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@af = alias void (...), bitcast (void ()* @f_with_alias to void (...)*)
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; COFFONLY: @af.[[SINGLEBB_HASH]] = alias void (...), bitcast (void ()* @f_with_alias.[[SINGLEBB_HASH]] to
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; ELFONLY-DAG: @af.[[SINGLEBB_HASH]] = alias void (...), bitcast (void ()* @f_with_alias.[[SINGLEBB_HASH]] to
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define linkonce_odr void @f_with_alias() comdat($f_with_alias) {
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ret void
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}
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; Rename AvailableExternallyLinkage functions
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; ELFONLY-DAG: $aef.[[SINGLEBB_HASH]] = comdat any
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define available_externally void @aef() {
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; ELFONLY: define linkonce_odr void @aef.[[SINGLEBB_HASH]]() comdat {
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; COFFONLY: define available_externally void @aef() {
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ret void
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}
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