diff options
author | Rafael Espindola <rafael.espindola@gmail.com> | 2014-01-16 04:50:58 +0000 |
---|---|---|
committer | Rafael Espindola <rafael.espindola@gmail.com> | 2014-01-16 04:50:58 +0000 |
commit | 59c2fe1af1bc2b3107140668c9237aef9d3ad392 (patch) | |
tree | 4743f59cc417f6951f8a12b541ccc23889892521 /lib/ExecutionEngine/RuntimeDyld/GDBRegistrar.cpp | |
parent | 6a8151dba16a2315e1b2a7daf27ff454c26d0ad5 (diff) | |
download | llvm-59c2fe1af1bc2b3107140668c9237aef9d3ad392.tar.gz llvm-59c2fe1af1bc2b3107140668c9237aef9d3ad392.tar.bz2 llvm-59c2fe1af1bc2b3107140668c9237aef9d3ad392.tar.xz |
Prevent calls to __jit_debug_register_code from being optimized out.
Patch by Andrew MacPherson. I just tweaked the comment.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199350 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/ExecutionEngine/RuntimeDyld/GDBRegistrar.cpp')
-rw-r--r-- | lib/ExecutionEngine/RuntimeDyld/GDBRegistrar.cpp | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/lib/ExecutionEngine/RuntimeDyld/GDBRegistrar.cpp b/lib/ExecutionEngine/RuntimeDyld/GDBRegistrar.cpp index 603c526d06..60adc9b383 100644 --- a/lib/ExecutionEngine/RuntimeDyld/GDBRegistrar.cpp +++ b/lib/ExecutionEngine/RuntimeDyld/GDBRegistrar.cpp @@ -47,7 +47,11 @@ extern "C" { struct jit_descriptor __jit_debug_descriptor = { 1, 0, 0, 0 }; // Debuggers puts a breakpoint in this function. - LLVM_ATTRIBUTE_NOINLINE void __jit_debug_register_code() { } + LLVM_ATTRIBUTE_NOINLINE void __jit_debug_register_code() { + // The noinline and the asm prevent calls to this function from being + // optimized out. + asm volatile("":::"memory"); + } } |