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from Souper IR to WASM #13

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Sep 16, 2019
Merged

from Souper IR to WASM #13

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397c2af
basic solution for souper2wasm
Sep 11, 2019
e3bef03
minor improvements
Sep 16, 2019
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19 changes: 19 additions & 0 deletions utils/souper2wasm/README.md
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# from Souper IR to WASM

__Souper IR → LLVM IR__
Souper's [souper-check.cpp](https://github.com/google/souper/blob/master/tools/souper-check.cpp) and [souper2llvm.in](https://github.com/google/souper/blob/master/utils/souper2llvm.in)

__LLVM IR → WASM__
`llc -mtriple=wasm32-unknown-unknown` ([blog](https://medium.com/@richardanaya/write-web-assembly-with-llvm-fbee788b2817))

## run demo
```
zsh run.sh
```

## requirements
Python >= 3.6
LLVM >= 8.0

## existing issues
- In some cases (like `demo/negate.opt`), width info can not be identified correctly
11 changes: 11 additions & 0 deletions utils/souper2wasm/demo/infer.ll
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"


define i1 @foo(i1 %x1, i64 %x2) {
entry:
%0 = icmp ult i64 135637824071393761, %x2
%1 = or i1 %x1, %0
%2 = select i1 %1, i64 135637824071393761, i64 %x2
%3 = icmp ult i64 135637824071393761, %2
ret i1 %3
}
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20 changes: 20 additions & 0 deletions utils/souper2wasm/demo/infer.opt
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; REQUIRES: solver

; RUN: %souper-check %solver -infer-rhs -print-replacement %s > %t1
; RUN: %FileCheck %s -check-prefix=SUCCESS < %t1
; RUN: %parser-test < %t1
; RUN: %souper-check %solver < %t1 | %FileCheck -check-prefix=LGTM %s
; RUN: %souper-check %solver -infer-rhs %s > %t2
; RUN: cat %s %t2 | %souper-check %solver | %FileCheck -check-prefix=LGTM %s

; SUCCESS: RHS inferred successfully
; LGTM: LGTM

%0:i1 = var
%1:i64 = var
%2:i1 = ult 135637824071393761:i64, %1
%3:i1 = or %0, %2
%4:i64 = select %3, 135637824071393761:i64, %1
%5:i1 = ult 135637824071393761:i64, %4
infer %5

19 changes: 19 additions & 0 deletions utils/souper2wasm/demo/negate.opt
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; REQUIRES: solver

; RUN: %souper-check %solver -print-replacement %s > %t1
; RUN: %FileCheck %s < %t1
; RUN: %parser-test < %t1
; RUN: %souper-check %solver %t1 | %FileCheck %s

; RUN: %souper-check %solver -print-replacement-split %s > %t2
; RUN: %FileCheck %s < %t2
; RUN: %parser-test < %t2
; RUN: %souper-check %solver %t2 | %FileCheck %s

; CHECK: LGTM

%0:i64 = var
%1:i64 = xor %0, -1:i64
%2:i64 = add %1, 1:i64
%3:i64 = sub 0:i64, %0
cand %2 %3
7 changes: 7 additions & 0 deletions utils/souper2wasm/run.sh
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echo "py ... \c"
python3 souper2llvm.py demo/infer.opt
echo "okay"

echo "llc ... \c"
llc -mtriple=wasm32-unknown-unknown -O3 -filetype=obj demo/infer.ll -o demo/infer.o
echo "okay"
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