| Issue |
75714
|
| Summary |
i128: "Unexpected truncation" failure in SystemZDAGToDAGISel::getAddressOperands()
|
| Labels |
backend:SystemZ
|
| Assignees |
uweigand
|
| Reporter |
JonPsson1
|
Another test case with problem truncating from i128:
```
@safe_rshift_func_uint8_t_u_u_left = dso_local local_unnamed_addr global i8 0, align 2
@func_54_p_58 = dso_local local_unnamed_addr global i32 0, align 4
@g_38_0_0 = internal global i32 0, align 4
@g_76 = internal unnamed_addr global i128 6, align 8
define dso_local void @main() {
entry:
%g_76.promoted13.i.i.i = load i128, ptr @g_76, align 8
%0 = add i128 %g_76.promoted13.i.i.i, 5
store i128 %0, ptr @g_76, align 8
store i32 6, ptr @func_54_p_58, align 4
%cmp6.i.i = icmp ugt i128 %0, 7
%1 = load i8, ptr @safe_rshift_func_uint8_t_u_u_left, align 2
%conv8.i.i = zext i8 %1 to i32
%sh_prom.i.i = trunc i128 %0 to i32
%shr.i.i = lshr i32 %conv8.i.i, %sh_prom.i.i
%conv10.i.i = select i1 %cmp6.i.i, i32 0, i32 %shr.i.i
store i32 %conv10.i.i, ptr @g_38_0_0, align 4
ret void
}
```
llc -mtriple=s390x-linux-gnu -mcpu=z13 tcAM.ll
SystemZDAGToDAGISel::getAddressOperands(const {anonymous}::SystemZAddressingMode&, llvm::EVT, llvm::SDValue&, llvm::SDValue&) const: Assertion `VT == MVT::i32 && Base.getValueType() == MVT::i64 && "Unexpected truncation"' failed.
SelectCode(Node):
```
(gdb) p CurDAG->dump()
SelectionDAG has 30 nodes:
t0: ch,glue = EntryToken
t45: i64 = SystemZISD::PCREL_WRAPPER TargetGlobalAddress:i64<ptr @g_76> 0
t41: i64 = SystemZISD::PCREL_WRAPPER TargetGlobalAddress:i64<ptr @safe_rshift_func_uint8_t_u_u_left> 0
t28: i32,ch = load<(dereferenceable load (s8) from @safe_rshift_func_uint8_t_u_u_left, align 2), zext from i8> t0, t41, undef:i64
t4: i128,ch = load<(dereferenceable load (s128) from @g_76, align 8)> t0, t45, undef:i64
t6: i128 = add t4, Constant:i128<5>
t46: i32 = TargetConstant<0>
t17: i32 = truncate t6
t18: i32 = srl t28, t17
t34: i32 = SystemZISD::UCMP128HI t6, Constant:i128<7>
t49: ch,glue = CopyToReg t0, Register:i32 $cc, t34
t37: i32 = LOCHIMux t18, TargetConstant:i64<0>, TargetConstant:i32<15>, TargetConstant:i32<4>, t49:1
t24: ch = STRL<Mem:(store (s32) into @g_38_0_0)> t37, TargetGlobalAddress:i64<ptr @g_38_0_0> 0, t0
t7: ch = store<(store (s128) into @g_76, align 8)> t4:1, t6, t45, undef:i64
t43: i64 = SystemZISD::PCREL_WRAPPER TargetGlobalAddress:i64<ptr @func_54_p_58> 0
t31: ch = store<(store (s32) into @func_54_p_58)> t0, Constant:i32<6>, t43, undef:i64
t33: ch = TokenFactor t24, t28:1, t7, t31
t23: ch = Return t33
$233 = void
(gdb) p Node->dump()
t18: i32 = srl t28, t17
```
![]()
_______________________________________________
llvm-bugs mailing list
[email protected]
https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-bugs
