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[CIR][CIRGen][Builtin][X86] lower stmx and ldmx intrinsics #1776

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Merged
merged 1 commit into from
Aug 25, 2025
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[CIR][CIRGen][Builtin][X86] lower stmx and ldmx intrinsics #1776

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17 changes: 15 additions & 2 deletions clang/lib/CIR/CodeGen/CIRGenBuiltinX86.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -359,11 +359,24 @@ mlir::Value CIRGenFunction::emitX86BuiltinExpr(unsigned BuiltinID,
}
case X86::BI_mm_setcsr:
case X86::BI__builtin_ia32_ldmxcsr: {
llvm_unreachable("mm_setcsr NYI");
Address tmp =
CreateMemTemp(E->getArg(0)->getType(), getLoc(E->getExprLoc()));
builder.createStore(getLoc(E->getExprLoc()), Ops[0], tmp);
return builder
.create<cir::LLVMIntrinsicCallOp>(
getLoc(E->getExprLoc()), builder.getStringAttr("x86.sse.ldmxcsr"),
builder.getVoidTy(), tmp.getPointer())
.getResult();
}
case X86::BI_mm_getcsr:
case X86::BI__builtin_ia32_stmxcsr: {
llvm_unreachable("mm_getcsr NYI");
Address tmp = CreateMemTemp(E->getType(), getLoc(E->getExprLoc()));
builder
.create<cir::LLVMIntrinsicCallOp>(
getLoc(E->getExprLoc()), builder.getStringAttr("x86.sse.stmxcsr"),
builder.getVoidTy(), tmp.getPointer())
.getResult();
return builder.createLoad(getLoc(E->getExprLoc()), tmp);
}

case X86::BI__builtin_ia32_xsave:
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23 changes: 23 additions & 0 deletions clang/test/CIR/CodeGen/X86/sse-builtins.c
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Expand Up @@ -42,3 +42,26 @@ __m128 test_mm_undefined_ps(void) {
// LLVM: ret <4 x float> %{{.*}}
return _mm_undefined_ps();
}

void test_mm_setcsr(unsigned int A) {
// CIR-LABEL: test_mm_setcsr
// CIR: cir.store {{.*}}, {{.*}} : !u32i
// CIR: cir.llvm.intrinsic "x86.sse.ldmxcsr" {{.*}} : (!cir.ptr<!u32i>) -> !void

// LLVM-LABEL: test_mm_setcsr
// LLVM: store i32
// LLVM: call void @llvm.x86.sse.ldmxcsr(ptr {{.*}})
_mm_setcsr(A);
}

unsigned int test_mm_getcsr(void) {
// CIR-LABEL: test_mm_getcsr
// CIR: cir.llvm.intrinsic "x86.sse.stmxcsr" %{{.*}} : (!cir.ptr<!u32i>) -> !void
// CIR: cir.load {{.*}} : !cir.ptr<!u32i>, !u32i

// LLVM-LABEL: test_mm_getcsr
// LLVM: call void @llvm.x86.sse.stmxcsr(ptr %{{.*}})
// LLVM: load i32
return _mm_getcsr();
}

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