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author | Timm Baeder <tbaeder@redhat.com> | 2023-11-16 07:30:54 +0100 |
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committer | GitHub <noreply@github.com> | 2023-11-16 07:30:54 +0100 |
commit | bffa8e1d1aeebdcfca935f7b998e8e100bca08a4 (patch) | |
tree | 953d9d19d3fef3f28d793a201436902dbc0b8fa5 /clang | |
parent | c3b9c36f3ab4d9021951a00c9a6798e3fe0a48a5 (diff) | |
download | llvm-bffa8e1d1aeebdcfca935f7b998e8e100bca08a4.zip llvm-bffa8e1d1aeebdcfca935f7b998e8e100bca08a4.tar.gz llvm-bffa8e1d1aeebdcfca935f7b998e8e100bca08a4.tar.bz2 |
[clang][Interp] Implement __builtin_clrsb (#72243)
Diffstat (limited to 'clang')
-rw-r--r-- | clang/lib/AST/Interp/InterpBuiltin.cpp | 16 | ||||
-rw-r--r-- | clang/test/AST/Interp/builtin-functions.cpp | 14 |
2 files changed, 30 insertions, 0 deletions
diff --git a/clang/lib/AST/Interp/InterpBuiltin.cpp b/clang/lib/AST/Interp/InterpBuiltin.cpp index 0536fe4..8c5efe2 100644 --- a/clang/lib/AST/Interp/InterpBuiltin.cpp +++ b/clang/lib/AST/Interp/InterpBuiltin.cpp @@ -448,6 +448,15 @@ static bool interp__builtin_parity(InterpState &S, CodePtr OpPC, return true; } +static bool interp__builtin_clrsb(InterpState &S, CodePtr OpPC, + const InterpFrame *Frame, + const Function *Func, const CallExpr *Call) { + PrimType ArgT = *S.getContext().classify(Call->getArg(0)->getType()); + APSInt Val = peekToAPSInt(S.Stk, ArgT); + pushInt(S, Val.getBitWidth() - Val.getSignificantBits()); + return true; +} + bool InterpretBuiltin(InterpState &S, CodePtr OpPC, const Function *F, const CallExpr *Call) { InterpFrame *Frame = S.Current; @@ -592,6 +601,13 @@ bool InterpretBuiltin(InterpState &S, CodePtr OpPC, const Function *F, return retInt(S, OpPC, Dummy); break; + case Builtin::BI__builtin_clrsb: + case Builtin::BI__builtin_clrsbl: + case Builtin::BI__builtin_clrsbll: + if (interp__builtin_clrsb(S, OpPC, Frame, F, Call)) + return retInt(S, OpPC, Dummy); + break; + default: return false; } diff --git a/clang/test/AST/Interp/builtin-functions.cpp b/clang/test/AST/Interp/builtin-functions.cpp index 14604a2b..acc2dc3 100644 --- a/clang/test/AST/Interp/builtin-functions.cpp +++ b/clang/test/AST/Interp/builtin-functions.cpp @@ -310,3 +310,17 @@ namespace parity { char parity10[__builtin_parityll(1LL << (BITSIZE(long long) - 1)) == 1 ? 1 : -1]; } +namespace clrsb { + char clrsb1[__builtin_clrsb(0) == BITSIZE(int) - 1 ? 1 : -1]; + char clrsb2[__builtin_clrsbl(0L) == BITSIZE(long) - 1 ? 1 : -1]; + char clrsb3[__builtin_clrsbll(0LL) == BITSIZE(long long) - 1 ? 1 : -1]; + char clrsb4[__builtin_clrsb(~0) == BITSIZE(int) - 1 ? 1 : -1]; + char clrsb5[__builtin_clrsbl(~0L) == BITSIZE(long) - 1 ? 1 : -1]; + char clrsb6[__builtin_clrsbll(~0LL) == BITSIZE(long long) - 1 ? 1 : -1]; + char clrsb7[__builtin_clrsb(1) == BITSIZE(int) - 2 ? 1 : -1]; + char clrsb8[__builtin_clrsb(~1) == BITSIZE(int) - 2 ? 1 : -1]; + char clrsb9[__builtin_clrsb(1 << (BITSIZE(int) - 1)) == 0 ? 1 : -1]; + char clrsb10[__builtin_clrsb(~(1 << (BITSIZE(int) - 1))) == 0 ? 1 : -1]; + char clrsb11[__builtin_clrsb(0xf) == BITSIZE(int) - 5 ? 1 : -1]; + char clrsb12[__builtin_clrsb(~0x1f) == BITSIZE(int) - 6 ? 1 : -1]; +} |