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Mark the prefetch intrinsic as IntrWriteArgMem, instead of the

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default of IntrWriteMem, to at least indicate that it doesn't
"capture" the argument pointer.

llvm-svn: 42768
This commit is contained in:
Dan Gohman 2007-10-08 21:15:07 +00:00
parent 9da3bddf43
commit a2ec0a3c2c
1 changed files with 5 additions and 1 deletions
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6
include/llvm/Intrinsics.td
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@ -153,8 +153,12 @@ def int_stacksave : Intrinsic<[llvm_ptr_ty], [IntrReadMem]>,
GCCBuiltin<"__builtin_stack_save">;
def int_stackrestore : Intrinsic<[llvm_void_ty, llvm_ptr_ty]>,
GCCBuiltin<"__builtin_stack_restore">;
// IntrWriteArgMem is more pessimistic than strictly necessary for prefetch,
// however it does conveniently prevent the prefetch from being reordered
// with respect to nearby accesses to the same memory.
def int_prefetch : Intrinsic<[llvm_void_ty, llvm_ptr_ty,
llvm_i32_ty, llvm_i32_ty]>;
llvm_i32_ty, llvm_i32_ty],
[IntrWriteArgMem]>;
def int_pcmarker : Intrinsic<[llvm_void_ty, llvm_i32_ty]>;
def int_readcyclecounter : Intrinsic<[llvm_i64_ty]>;