[Analysis] Support aligned new/delete functions.
Summary:
Clang's __builtin_operator_new/delete was recently taught about the aligned allocation overloads (r328134). This patch makes LLVM aware of them as well.
This allows the compiler to perform certain optimizations including eliding new/delete calls.
Reviewers: rsmith, majnemer, dblaikie, vsk, bkramer
Reviewed By: bkramer
Subscribers: ckennelly, llvm-commits
Differential Revision: https://reviews.llvm.org/D44769
llvm-svn: 329218
diff --git a/llvm/lib/Analysis/MemoryBuiltins.cpp b/llvm/lib/Analysis/MemoryBuiltins.cpp
index 8c0c374..2e5197a 100644
--- a/llvm/lib/Analysis/MemoryBuiltins.cpp
+++ b/llvm/lib/Analysis/MemoryBuiltins.cpp
@@ -75,12 +75,24 @@
{LibFunc_valloc, {MallocLike, 1, 0, -1}},
{LibFunc_Znwj, {OpNewLike, 1, 0, -1}}, // new(unsigned int)
{LibFunc_ZnwjRKSt9nothrow_t, {MallocLike, 2, 0, -1}}, // new(unsigned int, nothrow)
+ {LibFunc_ZnwjSt11align_val_t, {OpNewLike, 2, 0, -1}}, // new(unsigned int, align_val_t)
+ {LibFunc_ZnwjSt11align_val_tRKSt9nothrow_t, // new(unsigned int, align_val_t, nothrow)
+ {MallocLike, 3, 0, -1}},
{LibFunc_Znwm, {OpNewLike, 1, 0, -1}}, // new(unsigned long)
{LibFunc_ZnwmRKSt9nothrow_t, {MallocLike, 2, 0, -1}}, // new(unsigned long, nothrow)
+ {LibFunc_ZnwmSt11align_val_t, {OpNewLike, 2, 0, -1}}, // new(unsigned long, align_val_t)
+ {LibFunc_ZnwmSt11align_val_tRKSt9nothrow_t, // new(unsigned long, align_val_t, nothrow)
+ {MallocLike, 3, 0, -1}},
{LibFunc_Znaj, {OpNewLike, 1, 0, -1}}, // new[](unsigned int)
{LibFunc_ZnajRKSt9nothrow_t, {MallocLike, 2, 0, -1}}, // new[](unsigned int, nothrow)
+ {LibFunc_ZnajSt11align_val_t, {OpNewLike, 2, 0, -1}}, // new[](unsigned int, align_val_t)
+ {LibFunc_ZnajSt11align_val_tRKSt9nothrow_t, // new[](unsigned int, align_val_t, nothrow)
+ {MallocLike, 3, 0, -1}},
{LibFunc_Znam, {OpNewLike, 1, 0, -1}}, // new[](unsigned long)
{LibFunc_ZnamRKSt9nothrow_t, {MallocLike, 2, 0, -1}}, // new[](unsigned long, nothrow)
+ {LibFunc_ZnamSt11align_val_t, {OpNewLike, 2, 0, -1}}, // new[](unsigned long, align_val_t)
+ {LibFunc_ZnamSt11align_val_tRKSt9nothrow_t, // new[](unsigned long, align_val_t, nothrow)
+ {MallocLike, 3, 0, -1}},
{LibFunc_msvc_new_int, {OpNewLike, 1, 0, -1}}, // new(unsigned int)
{LibFunc_msvc_new_int_nothrow, {MallocLike, 2, 0, -1}}, // new(unsigned int, nothrow)
{LibFunc_msvc_new_longlong, {OpNewLike, 1, 0, -1}}, // new(unsigned long long)
@@ -372,9 +384,11 @@
else if (TLIFn == LibFunc_ZdlPvj || // delete(void*, uint)
TLIFn == LibFunc_ZdlPvm || // delete(void*, ulong)
TLIFn == LibFunc_ZdlPvRKSt9nothrow_t || // delete(void*, nothrow)
+ TLIFn == LibFunc_ZdlPvSt11align_val_t || // delete(void*, align_val_t)
TLIFn == LibFunc_ZdaPvj || // delete[](void*, uint)
TLIFn == LibFunc_ZdaPvm || // delete[](void*, ulong)
TLIFn == LibFunc_ZdaPvRKSt9nothrow_t || // delete[](void*, nothrow)
+ TLIFn == LibFunc_ZdaPvSt11align_val_t || // delete[](void*, align_val_t)
TLIFn == LibFunc_msvc_delete_ptr32_int || // delete(void*, uint)
TLIFn == LibFunc_msvc_delete_ptr64_longlong || // delete(void*, ulonglong)
TLIFn == LibFunc_msvc_delete_ptr32_nothrow || // delete(void*, nothrow)
@@ -384,6 +398,9 @@
TLIFn == LibFunc_msvc_delete_array_ptr32_nothrow || // delete[](void*, nothrow)
TLIFn == LibFunc_msvc_delete_array_ptr64_nothrow) // delete[](void*, nothrow)
ExpectedNumParams = 2;
+ else if (TLIFn == LibFunc_ZdaPvSt11align_val_tRKSt9nothrow_t || // delete(void*, align_val_t, nothrow)
+ TLIFn == LibFunc_ZdlPvSt11align_val_tRKSt9nothrow_t) // delete[](void*, align_val_t, nothrow)
+ ExpectedNumParams = 3;
else
return nullptr;