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| author | Andrew Kelley <andrew@ziglang.org> | 2019-06-03 20:56:22 -0400 |
|---|---|---|
| committer | Andrew Kelley <andrew@ziglang.org> | 2019-06-03 20:56:22 -0400 |
| commit | d4054e35fe3a6ba4b4f0d1a0da0e0149f21b49a4 (patch) | |
| tree | 4318552d331be2a3b8465897dc5e18f52e18e501 /src/parser.cpp | |
| parent | b6108eed522b7a0122d305dc1a74de8f12f20d5b (diff) | |
| download | zig-d4054e35fe3a6ba4b4f0d1a0da0e0149f21b49a4.tar.gz zig-d4054e35fe3a6ba4b4f0d1a0da0e0149f21b49a4.zip | |
while loops
Note that neither the payload capture variable nor the error capture
variable require a stack allocation.
```zig
export fn entry() void {
var c: anyerror!i32 = 1234;
while (c) |hi| {} else |e| {}
}
```
```llvm
define void @entry() #2 !dbg !39 {
Entry:
%c = alloca { i16, i32 }, align 4
%0 = bitcast { i16, i32 }* %c 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 }* %c, metadata !43, metadata !DIExpression()), !dbg !52
br label %WhileCond, !dbg !53
WhileCond: ; preds = %WhileBody, %Entry
%1 = getelementptr inbounds { i16, i32 }, { i16, i32 }* %c, i32 0, i32 0, !dbg !54
%2 = load i16, i16* %1, align 2, !dbg !54
%3 = icmp ne i16 %2, 0, !dbg !54
br i1 %3, label %WhileElse, label %WhileBody, !dbg !54
WhileBody: ; preds = %WhileCond
%4 = getelementptr inbounds { i16, i32 }, { i16, i32 }* %c, i32 0, i32 1, !dbg !53
call void @llvm.dbg.declare(metadata i32* %4, metadata !50, metadata !DIExpression()), !dbg !53
br label %WhileCond, !dbg !53
WhileElse: ; preds = %WhileCond
%5 = getelementptr inbounds { i16, i32 }, { i16, i32 }* %c, i32 0, i32 0, !dbg !55
call void @llvm.dbg.declare(metadata i16* %5, metadata !51, metadata !DIExpression()), !dbg !55
ret void, !dbg !56
}
```
Diffstat (limited to 'src/parser.cpp')
0 files changed, 0 insertions, 0 deletions