4684f824d4
Re-enable the code to rewrite main-function signatures into "int main(int argc, char *argv[])", but limited to only handling the case of "int main(void)", so that it doesn't silently strip an argument in the "int main(int argc, char *argv[], char *envp[])" case. This allows main to be called by C startup code, since WebAssembly requires caller and callee signatures to match, so it can't rely on passing main a different number of arguments than it expects. Differential Revision: https://reviews.llvm.org/D57323 llvm-svn: 352479
32 lines
1.1 KiB
LLVM
32 lines
1.1 KiB
LLVM
; RUN: llc < %s -asm-verbose=false -wasm-keep-registers | FileCheck %s
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; Test that function pointer casts casting away varargs are replaced with
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; wrappers.
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target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
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target triple = "wasm32-unknown-unknown"
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define void @callWithArgs() {
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entry:
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call void bitcast (void (...)* @underspecified to void (i32, i32)*)(i32 0, i32 1)
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call void(...) bitcast (void (i32, i32)* @specified to void (...)*)(i32 0, i32 1)
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ret void
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}
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declare void @underspecified(...)
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declare void @specified(i32, i32)
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; CHECK: callWithArgs:
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; CHECK: i32.const $push1=, 0
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; CHECK-NEXT: i32.const $push0=, 1
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; CHECK-NEXT: call .Lunderspecified_bitcast@FUNCTION, $pop1, $pop0
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; CHECK: call .Lspecified_bitcast@FUNCTION, $pop{{[0-9]+$}}
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; CHECK: .Lunderspecified_bitcast:
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; CHECK-NEXT: .functype .Lunderspecified_bitcast (i32, i32) -> (){{$}}
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; CHECK: call underspecified@FUNCTION, $pop{{[0-9]+$}}
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; CHECK: .Lspecified_bitcast:
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; CHECK-NEXT: .functype .Lspecified_bitcast (i32) -> (){{$}}
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; CHECK: call specified@FUNCTION, $pop{{[0-9]+}}, $pop{{[0-9]+$}}
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