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| author | Andrew Kelley <andrew@ziglang.org> | 2019-06-03 21:53:32 -0400 |
|---|---|---|
| committer | Andrew Kelley <andrew@ziglang.org> | 2019-06-03 21:53:32 -0400 |
| commit | a32abcd365f0a019d3f858c4ee769a8348f0f4a2 (patch) | |
| tree | 02dac2de864ba1d4f37bf32e01ecb8ca09130098 /src/parser.cpp | |
| parent | 143d6ada8f93872b94a8f20927e11cae243028d9 (diff) | |
| download | zig-a32abcd365f0a019d3f858c4ee769a8348f0f4a2.tar.gz zig-a32abcd365f0a019d3f858c4ee769a8348f0f4a2.zip | |
no-copy semantics for if optional and if error union
if expressions no longer introduce a stack allocation.
```zig
export fn entry() void {
var x: anyerror!i32 = 1234;
if (x) |i| {} else |e| {}
}
```
```llvm
define void @entry() #2 !dbg !39 {
Entry:
%x = alloca { i16, i32 }, align 4
%0 = bitcast { i16, i32 }* %x to i8*, !dbg !52
call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 4 %0, i8* align 4 bitcast ({ i16, i32 }* @0 to i8*), i64 8, i1 false), !dbg !52
call void @llvm.dbg.declare(metadata { i16, i32 }* %x, metadata !43, metadata !DIExpression()), !dbg !52
%1 = getelementptr inbounds { i16, i32 }, { i16, i32 }* %x, i32 0, i32 0, !dbg !53
%2 = load i16, i16* %1, align 2, !dbg !53
%3 = icmp ne i16 %2, 0, !dbg !53
br i1 %3, label %TryElse, label %TryOk, !dbg !53
TryOk: ; preds = %Entry
%4 = getelementptr inbounds { i16, i32 }, { i16, i32 }* %x, i32 0, i32 1, !dbg !53
call void @llvm.dbg.declare(metadata i32* %4, metadata !50, metadata !DIExpression()), !dbg !53
br label %TryEnd, !dbg !53
TryElse: ; preds = %Entry
%5 = getelementptr inbounds { i16, i32 }, { i16, i32 }* %x, i32 0, i32 0, !dbg !53
call void @llvm.dbg.declare(metadata i16* %5, metadata !51, metadata !DIExpression()), !dbg !53
br label %TryEnd, !dbg !53
TryEnd: ; preds = %TryElse, %TryOk
ret void, !dbg !54
}
```
Diffstat (limited to 'src/parser.cpp')
0 files changed, 0 insertions, 0 deletions