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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
27 lines
1.3 KiB
LLVM
27 lines
1.3 KiB
LLVM
; RUN: opt < %s -pgo-instr-gen -instrprof -S | FileCheck %s
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; RUN: opt < %s -passes=pgo-instr-gen,instrprof -S | FileCheck %s
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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$foo = comdat any
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; CHECK: $foo.[[FOO_HASH:[0-9]+]] = comdat any
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; CHECK: $__llvm_profile_raw_version = comdat any
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; CHECK: $__profv__stdin__foo.[[FOO_HASH]] = comdat any
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@bar = global i32 ()* @foo, align 8
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; CHECK: @__llvm_profile_raw_version = constant i64 {{[0-9]+}}, comdat
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; CHECK: @__profn__stdin__foo.[[FOO_HASH]] = private constant [23 x i8] c"<stdin>:foo.[[FOO_HASH]]"
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; CHECK: @__profc__stdin__foo.[[FOO_HASH]] = private global [1 x i64] zeroinitializer, section "__llvm_prf_cnts", comdat($__profv__stdin__foo.[[FOO_HASH]]), align 8
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; CHECK: @__profd__stdin__foo.[[FOO_HASH]] = private global { i64, i64, i64*, i8*, i8*, i32, [1 x i16] } { i64 6965568665848889497, i64 [[FOO_HASH]], i64* getelementptr inbounds ([1 x i64], [1 x i64]* @__profc__stdin__foo.[[FOO_HASH]], i32 0, i32 0), i8* null
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; CHECK-NOT: bitcast (i32 ()* @foo to i8*)
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; CHECK-SAME: , i8* null, i32 1, [1 x i16] zeroinitializer }, section "__llvm_prf_data", comdat($__profv__stdin__foo.[[FOO_HASH]]), align 8
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; CHECK: @__llvm_prf_nm
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; CHECK: @llvm.used
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define internal i32 @foo() comdat {
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entry:
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ret i32 1
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}
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