Andarwinux wrote:
```
target datalayout =
"e-m:w-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-pc-windows-gnu"
define ptr @__gdtoa(ptr %0, i32 %1, ptr %2, ptr %3, i32 %4, i32 %5, i32 %6) {
%8 = call ptr @bitstob(ptr null)
%9 = sub i32 0, %6
%10 = icmp sge i32 %6, 0
%11 = sub i32 %9, 1
%12 = sub i32 0, %11
%.0 = select i1 %10, i32 0, i32 %12
switch i32 %4, label %15 [
i32 0, label %13
i32 1, label %13
i32 2, label %common.ret1
i32 4, label %common.ret1
i32 3, label %14
i32 5, label %14
]
13: ; preds = %7, %7
store i32 0, ptr %3, align 4
br label %15
common.ret1: ; preds = %15, %7, %7
%common.ret1.op = phi ptr [ null, %15 ], [ null, %7 ], [ null, %7 ]
ret ptr %common.ret1.op
14: ; preds = %7, %7
store i32 %5, ptr %3, align 4
br label %15
15: ; preds = %14, %13, %7
%16 = call ptr @__rv_alloc_D2A()
store i32 0, ptr %2, align 4
%17 = sub i32 %.0, %5
store i32 %17, ptr %0, align 4
%18 = load volatile ptr, ptr null, align 8
%19 = sub i32 %9, %17
%20 = sub i32 0, %19
store i32 %20, ptr %0, align 4
call void @__Bfree_D2A()
store i32 %1, ptr %0, align 4
br label %common.ret1
}
declare ptr @bitstob(ptr)
declare void @__Bfree_D2A()
declare ptr @__rv_alloc_D2A()
```
```
clang -march=novalake reduced.ll --target=x86_64-pc-windows-gnu -O3 -c -o
/dev/null
fatal error: error in backend: Cannot emit physreg copy instruction
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and
include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0. Program arguments: clang -march=novalake reduced.ll
--target=x86_64-pc-windows-gnu -O3 -c -o /dev/null
1. Code generation
2. Running pass 'Function Pass Manager' on module 'reduced.ll'.
3. Running pass 'Post-RA pseudo instruction expansion pass' on function
'@__gdtoa'
#0 0x000064e9254c4936 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int)
Signals.cpp:0:0
clang: error: clang frontend command failed with exit code 70 (use -v to see
invocation)
```
https://github.com/llvm/llvm-project/pull/191368
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