hook up peer result locs to catch

```zig
export fn entry() void {
    var x = crap() catch bar();
}
```

```llvm
define void @entry() #2 !dbg !40 {
Entry:
  %0 = alloca { i16, %Foo }, align 4
  %x = alloca %Foo, align 4
  call fastcc void @crap({ i16, %Foo }* sret %0), !dbg !50
  %1 = getelementptr inbounds { i16, %Foo }, { i16, %Foo }* %0, i32 0, i32 0, !dbg !51
  %2 = load i16, i16* %1, align 2, !dbg !51
  %3 = icmp ne i16 %2, 0, !dbg !51
  br i1 %3, label %UnwrapErrError, label %UnwrapErrOk, !dbg !51

UnwrapErrError:                                   ; preds = %Entry
  call fastcc void @bar(%Foo* sret %x), !dbg !52
  br label %UnwrapErrEnd, !dbg !51

UnwrapErrOk:                                      ; preds = %Entry
  %4 = getelementptr inbounds { i16, %Foo }, { i16, %Foo }* %0, i32 0, i32 1, !dbg !51
  %5 = bitcast %Foo* %4 to i8*, !dbg !51
  %6 = bitcast %Foo* %x to i8*, !dbg !51
  call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 4 %6, i8* align 4 %5, i64 4, i1 false), !dbg !51
  br label %UnwrapErrEnd, !dbg !51

UnwrapErrEnd:                                     ; preds = %UnwrapErrOk, %UnwrapErrError
  ret void, !dbg !53
}
```
b1efba0c70Andrew Kelley committed on 6/7/2019, 9:37:29 PMparent2b0a1b7
2 files changedLine totals unavailable