[llvm-bugs] [Bug 37934] New: Invalid wasm signature for varargs functions that that fp128

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Mon Jun 25 17:31:58 PDT 2018


            Bug ID: 37934
           Summary: Invalid wasm signature for varargs functions that that
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Backend: WebAssembly
          Assignee: unassignedbugs at nondot.org
          Reporter: sbc at chromium.org
                CC: llvm-bugs at lists.llvm.org

The following C code produces an invalid wasm object file:

void test1(long double h, ...);

int main () {
  test1 (0.0L, 1);
  return 0;

pr44942.o:00000b8: error: type mismatch in call, expected [i64, i64, i32] but
got [i64, i32]

With the follow bitcode (that looks correct to me):

; Function Attrs: noinline nounwind optnone
define hidden i32 @main() #0 {
  %retval = alloca i32, align 4
  store i32 0, i32* %retval, align 4
  call void (fp128, ...) @test1(fp128 0xL00000000000000000000000000000000, i32
  ret i32 0

declare void @test1(fp128, ...) #1

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