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| author | Thomas Lively <tlively@google.com> | 2019-10-15 01:11:51 +0000 |
|---|---|---|
| committer | Thomas Lively <tlively@google.com> | 2019-10-15 01:11:51 +0000 |
| commit | 837a96eec129835f1c498b92c33037704a13bd91 (patch) | |
| tree | 0535179c46d24d920525d31015918f0e63270edc /include | |
| parent | cadc5f347808151935a6306afe20055dee34d42e (diff) | |
| download | clang-837a96eec129835f1c498b92c33037704a13bd91.tar.gz | |
[WebAssembly] Trapping fptoint builtins and intrinsics
Summary:
The WebAssembly backend lowers fptoint instructions to a code sequence
that checks for overflow to avoid traps because fptoint is supposed to
be speculatable. These new builtins and intrinsics give users a way to
depend on the trapping semantics of the underlying instructions and
avoid the extra code generated normally.
Patch by coffee and tlively.
Reviewers: aheejin
Subscribers: dschuff, sbc100, jgravelle-google, hiraditya, sunfish, cfe-commits, llvm-commits
Tags: #clang, #llvm
Differential Revision: https://reviews.llvm.org/D68902
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@374856 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'include')
| -rw-r--r-- | include/clang/Basic/BuiltinsWebAssembly.def | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/include/clang/Basic/BuiltinsWebAssembly.def b/include/clang/Basic/BuiltinsWebAssembly.def index 7e80e91c56..7fed9d2e43 100644 --- a/include/clang/Basic/BuiltinsWebAssembly.def +++ b/include/clang/Basic/BuiltinsWebAssembly.def @@ -49,6 +49,16 @@ BUILTIN(__builtin_wasm_atomic_wait_i32, "ii*iLLi", "n") BUILTIN(__builtin_wasm_atomic_wait_i64, "iLLi*LLiLLi", "n") BUILTIN(__builtin_wasm_atomic_notify, "Uii*Ui", "n") +// Trapping fp-to-int conversions +BUILTIN(__builtin_wasm_trunc_s_i32_f32, "if", "nc") +BUILTIN(__builtin_wasm_trunc_u_i32_f32, "if", "nc") +BUILTIN(__builtin_wasm_trunc_s_i32_f64, "id", "nc") +BUILTIN(__builtin_wasm_trunc_u_i32_f64, "id", "nc") +BUILTIN(__builtin_wasm_trunc_s_i64_f32, "LLif", "nc") +BUILTIN(__builtin_wasm_trunc_u_i64_f32, "LLif", "nc") +BUILTIN(__builtin_wasm_trunc_s_i64_f64, "LLid", "nc") +BUILTIN(__builtin_wasm_trunc_u_i64_f64, "LLid", "nc") + // Saturating fp-to-int conversions TARGET_BUILTIN(__builtin_wasm_trunc_saturate_s_i32_f32, "if", "nc", "nontrapping-fptoint") TARGET_BUILTIN(__builtin_wasm_trunc_saturate_u_i32_f32, "if", "nc", "nontrapping-fptoint") |