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14e8a5a32d
This is an instrumentation flag that's similar to -finstrument-functions, but it only inserts calls on function entry, the calls are inserted post-inlining, and they don't take any arugments. This is intended for users who want to instrument function entry with minimal overhead. (-pg would be another alternative, but forces frame pointer emission and affects link flags, so is probably best left alone to be used for generating gcov data.) Differential revision: https://reviews.llvm.org/D40276 llvm-svn: 318785
35 lines
1.1 KiB
C
35 lines
1.1 KiB
C
// RUN: %clang_cc1 -S -debug-info-kind=standalone -emit-llvm -o - %s -finstrument-functions -disable-llvm-passes | FileCheck %s
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// RUN: %clang_cc1 -S -debug-info-kind=standalone -emit-llvm -o - %s -finstrument-function-entry-bare -disable-llvm-passes | FileCheck -check-prefix=BARE %s
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int test1(int x) {
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// CHECK: @test1(i32 {{.*}}%x) #[[ATTR1:[0-9]+]]
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// CHECK: ret
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// BARE: @test1(i32 {{.*}}%x) #[[ATTR1:[0-9]+]]
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// BARE: ret
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return x;
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}
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int test2(int) __attribute__((no_instrument_function));
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int test2(int x) {
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// CHECK: @test2(i32 {{.*}}%x) #[[ATTR2:[0-9]+]]
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// CHECK: ret
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// BARE: @test2(i32 {{.*}}%x) #[[ATTR2:[0-9]+]]
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// BARE: ret
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return x;
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}
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// CHECK: attributes #[[ATTR1]] =
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// CHECK-SAME: "instrument-function-entry"="__cyg_profile_func_enter"
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// CHECK-SAME: "instrument-function-exit"="__cyg_profile_func_exit"
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// BARE: attributes #[[ATTR1]] =
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// BARE-SAME: "instrument-function-entry-inlined"="__cyg_profile_func_enter_bare"
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// CHECK: attributes #[[ATTR2]] =
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// CHECK-NOT: "instrument-function-entry"
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// BARE: attributes #[[ATTR2]] =
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// BARE-NOT: "instrument-function-entry"
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