| Issue |
173148
|
| Summary |
[InstCombine] opt hangs at O3
|
| Labels |
llvm:instcombine,
llvm:hang,
generated by fuzzer
|
| Assignees |
dtcxzyw
|
| Reporter |
dtcxzyw
|
Reproducer: https://godbolt.org/z/WGhzqnh64
```
; bin/opt -passes=instcombine test.ll -S
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
define fastcc i8 @func_125() {
entry:
br label %for.cond1826
for.cond1826: ; preds = %for.cond1826, %entry
%dec1838653 = phi i16 [ %spec.select, %for.cond1826 ], [ 0, %entry ]
%cmp1827 = phi i1 [ %spec.select663, %for.cond1826 ], [ false, %entry ]
%dec1838 = add i16 %dec1838653, -1
%spec.select = select i1 %cmp1827, i16 %dec1838653, i16 %dec1838
%spec.select663 = select i1 %cmp1827, i1 false, i1 true
br label %for.cond1826
}
```
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