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release/18.x: [AIX] Add a dummy variable in the __llvm_orderfile section (#81968) #82148

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Merged
merged 1 commit into from
Feb 20, 2024
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release/18.x: [AIX] Add a dummy variable in the __llvm_orderfile section (#81968) #82148

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4 changes: 3 additions & 1 deletion compiler-rt/lib/profile/InstrProfilingPlatformAIX.c
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Original file line number Diff line number Diff line change
Expand Up @@ -195,6 +195,8 @@ static const int dummy_name[0] COMPILER_RT_SECTION(
COMPILER_RT_SEG INSTR_PROF_NAME_SECT_NAME);
static int dummy_vnds[0] COMPILER_RT_SECTION(
COMPILER_RT_SEG INSTR_PROF_VNODES_SECT_NAME);
static int dummy_orderfile[0] COMPILER_RT_SECTION(
COMPILER_RT_SEG INSTR_PROF_ORDERFILE_SECT_NAME);

// To avoid GC'ing of the dummy variables by the linker, reference them in an
// array and reference the array in the runtime registration code
Expand All @@ -206,7 +208,7 @@ static int dummy_vnds[0] COMPILER_RT_SECTION(
COMPILER_RT_VISIBILITY
void *__llvm_profile_keep[] = {(void *)&dummy_cnts, (void *)&dummy_bits,
(void *)&dummy_data, (void *)&dummy_name,
(void *)&dummy_vnds};
(void *)&dummy_vnds, (void *)&dummy_orderfile};
#ifdef __GNUC__
#pragma GCC diagnostic pop
#endif
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7 changes: 7 additions & 0 deletions compiler-rt/test/profile/AIX/bexpfull-pgo.c
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@@ -0,0 +1,7 @@
// RUN: %clang_pgogen %s -bexpall
// RUN: %clang_pgogen %s -bexpfull

#include <string.h>
int ar[10];
int n;
int main() { memcpy(ar, ar + 1, n); };