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Mark math lib intrinsics readonly, on the grounds

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that they read the rounding mode.  This is conservatively
correct, which they weren't before.  We can do more
optimization on these if we actually model the rounding
mode.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55860 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dale Johannesen 2008-09-05 21:49:30 +00:00
parent c94fe21a56
commit 54d9f98a56
1 changed files with 4 additions and 1 deletions
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5
include/llvm/Intrinsics.td
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@ -193,7 +193,10 @@ let Properties = [IntrWriteArgMem] in {
llvm_i64_ty, llvm_i32_ty]>;
}
let Properties = [IntrNoMem] in {
// These functions do not actually read memory, but they are sensitive to the
// rounding mode. This needs to be modelled separately; in the meantime
// declaring them as reading memory is conservatively correct.
let Properties = [IntrReadMem] in {
def int_sqrt : Intrinsic<[llvm_anyfloat_ty, LLVMMatchType<0>]>;
def int_powi : Intrinsic<[llvm_anyfloat_ty, LLVMMatchType<0>, llvm_i32_ty]>;
def int_sin : Intrinsic<[llvm_anyfloat_ty, LLVMMatchType<0>]>;