fix: #395, check if loop body is a block and warp it if not

[wangl-cc]

There are four macros which will generate loop whose body is not a block. The gen_loop_issue395 and gen_A_mul_B macro cause StackOverflowError in current master while the gen_single_loop and gen_nest_loop cause LoadError: TypeError: in typeassert, expected Int64, got a value of type Static.StaticInt{1}. I have no idea about these errors, but warp those loop body as a block that fixes all of these error.

[chriselrod]

Mind bumping the patch version?

[wangl-cc]

@chriselrod Should I squash?

[chriselrod]

@chriselrod Should I squash?

I enabled auto-merge squash, so it'll automatically merge once tests pass.
I'll have to re-enable it if you push any new commits, though.

[codecov]

Codecov Report

Merging #396 (07c702c) into master (77d0efb) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #396      +/-   ##
==========================================
+ Coverage   87.19%   87.21%   +0.01%     
==========================================
  Files          38       38              
  Lines        9499     9508       +9     
==========================================
+ Hits         8283     8292       +9     
  Misses       1216     1216              

Impacted Files	Coverage Δ
src/constructors.jl	98.36% <100.00%> (+0.13%)	⬆️

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[wangl-cc]

I don't know reason, it seams that Meta.isexpr break the fix. The != works see https://github.com/wangl-cc/LoopVectorization.jl/runs/5955789898?check_suite_focus=true.

I'm sorry, I forget a !.

[chriselrod]

I don't know reason, it seams that Meta.isexpr break the fix. The != works see https://github.com/wangl-cc/LoopVectorization.jl/runs/5955789898?check_suite_focus=true.

I'm sorry, I forget a !.

My bad, I think I didn't have it in my comment.

[chriselrod]

Thanks!