ubsan: Pass floating-point arguments to the runtime by value if they fit the
value argument.
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@177689 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/ubsan/ubsan_value.cc b/lib/ubsan/ubsan_value.cc
index f17c589..5d77350 100644
--- a/lib/ubsan/ubsan_value.cc
+++ b/lib/ubsan/ubsan_value.cc
@@ -13,6 +13,8 @@
//===----------------------------------------------------------------------===//
#include "ubsan_value.h"
+#include "sanitizer_common/sanitizer_common.h"
+#include "sanitizer_common/sanitizer_libc.h"
using namespace __ubsan;
@@ -66,16 +68,34 @@
/// them to be passed in floating-point registers, so this has little cost).
FloatMax Value::getFloatValue() const {
CHECK(getType().isFloatTy());
- switch (getType().getFloatBitWidth()) {
+ if (isInlineFloat()) {
+ switch (getType().getFloatBitWidth()) {
#if 0
- // FIXME: OpenCL / NEON 'half' type. LLVM can't lower the conversion
- // from this to 'long double'.
- case 16: return *reinterpret_cast<__fp16*>(Val);
+ // FIXME: OpenCL / NEON 'half' type. LLVM can't lower the conversion
+ // from '__fp16' to 'long double'.
+ case 16: {
+ __fp16 Value;
+ internal_memcpy(&Value, &Val, 4);
+ return Value;
+ }
#endif
- case 32: return *reinterpret_cast<float*>(Val);
- case 64: return *reinterpret_cast<double*>(Val);
- case 80: return *reinterpret_cast<long double*>(Val);
- case 128: return *reinterpret_cast<long double*>(Val);
+ case 32: {
+ float Value;
+ internal_memcpy(&Value, &Val, 4);
+ return Value;
+ }
+ case 64: {
+ double Value;
+ internal_memcpy(&Value, &Val, 8);
+ return Value;
+ }
+ }
+ } else {
+ switch (getType().getFloatBitWidth()) {
+ case 64: return *reinterpret_cast<double*>(Val);
+ case 80: return *reinterpret_cast<long double*>(Val);
+ case 128: return *reinterpret_cast<long double*>(Val);
+ }
}
UNREACHABLE("unexpected floating point bit width");
}