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Mark the prefetch intrinsic as IntrWriteArgMem, instead of the
default of IntrWriteMem, to at least indicate that it doesn't "capture" the argument pointer. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42768 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -153,8 +153,12 @@ def int_stacksave : Intrinsic<[llvm_ptr_ty], [IntrReadMem]>,
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GCCBuiltin<"__builtin_stack_save">;
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def int_stackrestore : Intrinsic<[llvm_void_ty, llvm_ptr_ty]>,
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GCCBuiltin<"__builtin_stack_restore">;
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// IntrWriteArgMem is more pessimistic than strictly necessary for prefetch,
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// however it does conveniently prevent the prefetch from being reordered
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// with respect to nearby accesses to the same memory.
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def int_prefetch : Intrinsic<[llvm_void_ty, llvm_ptr_ty,
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llvm_i32_ty, llvm_i32_ty]>;
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llvm_i32_ty, llvm_i32_ty],
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[IntrWriteArgMem]>;
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def int_pcmarker : Intrinsic<[llvm_void_ty, llvm_i32_ty]>;
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def int_readcyclecounter : Intrinsic<[llvm_i64_ty]>;
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