| Issue |
129394
|
| Summary |
Crash related to `half` with `aarch64-unknown-none` and `-fp-armv8`
|
| Labels |
|
| Assignees |
|
| Reporter |
tgross35
|
I haven't yet been able to reduce this any further, but the following hits an unreachable:
```llvm
; ModuleID = 'compiler_builtins.5353b839e5b95b34-cgu.22'
source_filename = "compiler_builtins.5353b839e5b95b34-cgu.22"
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128-Fn32"
target triple = "aarch64-unknown-none"
; compiler_builtins::math::libm::generic::rint::rint_round
; Function Attrs: mustprogress nofree norecurse noredzone nosync nounwind willreturn memory(none)
define hidden range(i32 0, 65536) i32 @problem(i16 %0, i8 noundef range(i8 0, 4) %_round) unnamed_addr #1 {
start:
%1 = and i16 %0, 31744
%_7 = icmp samesign ugt i16 %1, 24576
br i1 %_7, label %bb17, label %bb5
bb5: ; preds = %start
%_0.i.i2 = icmp sgt i16 %0, -1
%.0.self.sroa.0.0.copyload.cast.i34 = bitcast i16 %0 to half
%.40 = select i1 %_0.i.i2, half 0xH6400, half 0xHE400
%.41 = select i1 %_0.i.i2, half 0xHE400, half 0xH6400
%.42 = and i16 %0, -32768
%2 = fadd half %.40, %.0.self.sroa.0.0.copyload.cast.i34
%3 = fadd half %.41, %2
%_0.i = fcmp oeq half %3, 0xH0000
%y.0..cast = bitcast half %3 to i16
%4 = select i1 %_0.i, i16 %.42, i16 %y.0..cast
br label %bb17
bb17: ; preds = %bb5, %start
%5 = phi i16 [ %4, %bb5 ], [ %0, %start ]
%_0.sroa.0.0.insert.ext = zext i16 %5 to i32
ret i32 %_0.sroa.0.0.insert.ext
}
attributes #1 = { "target-features"="-fp-armv8" }
```
https://llvm.godbolt.org/z/j16aove8Y
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