67 lines
2.8 KiB
MLIR
67 lines
2.8 KiB
MLIR
// RUN: mlir-cpu-runner %s -e caller --entry-point-result=i32 | FileCheck %s
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// Varaidic argument list (va_list) and the extraction logics are ABI-specific.
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// REQUIRES: x86-native-target
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// Check if variadic functions can be called and the correct variadic argument
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// can be extracted.
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llvm.func @caller() -> i32 {
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%0 = llvm.mlir.constant(3 : i32) : i32
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%1 = llvm.mlir.constant(2 : i32) : i32
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%2 = llvm.mlir.constant(1 : i32) : i32
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%3 = llvm.call @foo(%2, %1, %0) : (i32, i32, i32) -> i32
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llvm.return %3 : i32
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}
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// Equivalent C code:
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// int foo(int X, ...) {
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// va_list args;
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// va_start(args, X);
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// int num = va_arg(args, int);
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// va_end(args);
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// return num;
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//}
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llvm.func @foo(%arg0: i32, ...) -> i32 {
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%0 = llvm.mlir.constant(8 : i64) : i64
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%1 = llvm.mlir.constant(2 : i32) : i32
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%2 = llvm.mlir.constant(0 : i64) : i64
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%3 = llvm.mlir.constant(0 : i64) : i64
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%4 = llvm.mlir.constant(8 : i32) : i32
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%5 = llvm.mlir.constant(3 : i32) : i32
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%6 = llvm.mlir.constant(0 : i64) : i64
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%7 = llvm.mlir.constant(0 : i64) : i64
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%8 = llvm.mlir.constant(41 : i32) : i32
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%9 = llvm.mlir.constant(0 : i32) : i32
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%10 = llvm.mlir.constant(0 : i64) : i64
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%11 = llvm.mlir.constant(0 : i64) : i64
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%12 = llvm.mlir.constant(1 : i32) : i32
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%13 = llvm.alloca %12 x !llvm.array<1 x struct<"struct.va_list", (i32, i32, ptr<i8>, ptr<i8>)>> {alignment = 8 : i64} : (i32) -> !llvm.ptr<array<1 x struct<"struct.va_list", (i32, i32, ptr<i8>, ptr<i8>)>>>
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%14 = llvm.bitcast %13 : !llvm.ptr<array<1 x struct<"struct.va_list", (i32, i32, ptr<i8>, ptr<i8>)>>> to !llvm.ptr<i8>
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llvm.intr.vastart %14
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%15 = llvm.getelementptr %13[%11, %10, 0] : (!llvm.ptr<array<1 x struct<"struct.va_list", (i32, i32, ptr<i8>, ptr<i8>)>>>, i64, i64) -> !llvm.ptr<i32>
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%16 = llvm.load %15 : !llvm.ptr<i32>
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%17 = llvm.icmp "ult" %16, %8 : i32
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llvm.cond_br %17, ^bb1, ^bb2
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^bb1: // pred: ^bb0
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%18 = llvm.getelementptr %13[%7, %6, 3] : (!llvm.ptr<array<1 x struct<"struct.va_list", (i32, i32, ptr<i8>, ptr<i8>)>>>, i64, i64) -> !llvm.ptr<ptr<i8>>
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%19 = llvm.load %18 : !llvm.ptr<ptr<i8>>
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%20 = llvm.zext %16 : i32 to i64
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%21 = llvm.getelementptr %19[%20] : (!llvm.ptr<i8>, i64) -> !llvm.ptr<i8>
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%22 = llvm.add %16, %4 : i32
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llvm.store %22, %15 : !llvm.ptr<i32>
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llvm.br ^bb3(%21 : !llvm.ptr<i8>)
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^bb2: // pred: ^bb0
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%23 = llvm.getelementptr %13[%3, %2, 2] : (!llvm.ptr<array<1 x struct<"struct.va_list", (i32, i32, ptr<i8>, ptr<i8>)>>>, i64, i64) -> !llvm.ptr<ptr<i8>>
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%24 = llvm.load %23 : !llvm.ptr<ptr<i8>>
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%25 = llvm.getelementptr %24[%0] : (!llvm.ptr<i8>, i64) -> !llvm.ptr<i8>
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llvm.store %25, %23 : !llvm.ptr<ptr<i8>>
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llvm.br ^bb3(%24 : !llvm.ptr<i8>)
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^bb3(%26: !llvm.ptr<i8>): // 2 preds: ^bb1, ^bb2
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%27 = llvm.bitcast %26 : !llvm.ptr<i8> to !llvm.ptr<i32>
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%28 = llvm.load %27 : !llvm.ptr<i32>
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llvm.intr.vaend %14
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llvm.return %28 : i32
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}
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// CHECK: 2
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