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authorRafael Espindola <rafael.espindola@gmail.com>2014-01-16 04:50:58 +0000
committerRafael Espindola <rafael.espindola@gmail.com>2014-01-16 04:50:58 +0000
commit59c2fe1af1bc2b3107140668c9237aef9d3ad392 (patch)
tree4743f59cc417f6951f8a12b541ccc23889892521 /lib/ExecutionEngine/RuntimeDyld/GDBRegistrar.cpp
parent6a8151dba16a2315e1b2a7daf27ff454c26d0ad5 (diff)
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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.cpp6
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");
+ }
}