[NVPTX] Add a clang builtin for the warpsize intrinsic
#110316
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Summary: There's an intrinsic for the warp size, we want to expose this to make the interface proposed in llvm#110179 more generic.
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@llvm/pr-subscribers-clang Author: Joseph Huber (jhuber6) ChangesSummary: Full diff: https://github.com/llvm/llvm-project/pull/110316.diff 2 Files Affected:
diff --git a/clang/include/clang/Basic/BuiltinsNVPTX.def b/clang/include/clang/Basic/BuiltinsNVPTX.def
index 6fff562165080a..6b7bce5bc00d4f 100644
--- a/clang/include/clang/Basic/BuiltinsNVPTX.def
+++ b/clang/include/clang/Basic/BuiltinsNVPTX.def
@@ -139,6 +139,7 @@ TARGET_BUILTIN(__nvvm_is_explicit_cluster, "b", "nc", AND(SM_90, PTX78))
BUILTIN(__nvvm_read_ptx_sreg_laneid, "i", "nc")
BUILTIN(__nvvm_read_ptx_sreg_warpid, "i", "nc")
BUILTIN(__nvvm_read_ptx_sreg_nwarpid, "i", "nc")
+BUILTIN(__nvvm_read_ptx_sreg_warpsize, "i", "nc")
BUILTIN(__nvvm_read_ptx_sreg_smid, "i", "nc")
BUILTIN(__nvvm_read_ptx_sreg_nsmid, "i", "nc")
diff --git a/clang/test/CodeGen/builtins-nvptx.c b/clang/test/CodeGen/builtins-nvptx.c
index bfa72e8bd69454..0d0e3ecdb90c9e 100644
--- a/clang/test/CodeGen/builtins-nvptx.c
+++ b/clang/test/CodeGen/builtins-nvptx.c
@@ -114,6 +114,7 @@ __device__ int read_ids() {
// CHECK: call i32 @llvm.nvvm.read.ptx.sreg.smid()
// CHECK: call i32 @llvm.nvvm.read.ptx.sreg.nsmid()
// CHECK: call i32 @llvm.nvvm.read.ptx.sreg.gridid()
+// CHECK: call i32 @llvm.nvvm.read.ptx.sreg.warpsize()
int a = __nvvm_read_ptx_sreg_laneid();
int b = __nvvm_read_ptx_sreg_warpid();
@@ -121,8 +122,9 @@ __device__ int read_ids() {
int d = __nvvm_read_ptx_sreg_smid();
int e = __nvvm_read_ptx_sreg_nsmid();
int f = __nvvm_read_ptx_sreg_gridid();
+ int g = __nvvm_read_ptx_sreg_warpsize();
- return a + b + c + d + e + f;
+ return a + b + c + d + e + f + g;
}
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Summary:
There's an intrinsic for the warp size, we want to expose this to make
the interface proposed in
#110179 more generic.