motiejus/zig
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4 Commits

Author SHA1 Message Date
Andrew Kelley
30a824cb9e astgen: eliminate rlWrapPtr and all its callsites 
The following AST avoids unnecessary derefs now:
 * error set decl
 * field access
 * array access
 * for loops: replace ensure_indexable and deref on the len_ptr with a
   special purpose ZIR instruction called indexable_ptr_len.

Added an error note when for loop operand is the wrong type.

I also accidentally implemented `@field`.
 2021-01-19 00:38:53 -07:00
Timon Kruiper
e1d8073d2f stage2: add support for loops in LLVM backend 
A simple `while(true) {}` loop generates the following LLVMIR:
```
define i32 @main() {
Entry:
  br label %Loop

Loop:                                 ; preds = %Loop, %Entry
  br label %Loop
}
```

Also implement TZIR printing for loops and add a corresponding test.
 2021-01-10 17:47:34 -08:00
Timon Kruiper
56c059077c stage2: add initial impl of control flow in LLVM backend 
The following TZIR instrutions have been implemented in the backend:
- all cmp operators (lt, lte, gt, gte, eq, neq)
- block
- br
- condbr

The following LLVMIR is generated for a simple assert function:
```
define void @assert(i1 %0) {
Entry:
  %1 = alloca i1, align 1
  store i1 %0, i1* %1, align 1
  %2 = load i1, i1* %1, align 1
  %3 = xor i1 %2, true
  br i1 %3, label %Then, label %Else

Then:                                             ; preds = %Entry
  call void @llvm.debugtrap()
  unreachable

Else:                                             ; preds = %Entry
  br label %Block

Block:                                            ; preds = %Else
  ret void
}
```

See tests for more examples.
 2021-01-08 19:30:52 +01:00
Timon Kruiper
b1cfa923be stage2: rename and move files related to LLVM backend 2021-01-06 10:52:20 +01:00