| Issue |
184133
|
| Summary |
llvm-diff fails with assert "structural differences second time around?"
|
| Labels |
llvm-tools,
crash-on-valid
|
| Assignees |
|
| Reporter |
arsenm
|
a.ll:
```
define { double, i32 } @func() {
entry:
%i = tail call double @llvm.maxnum.f64(double 0.000000e+00, double 0.000000e+00)
%i1 = tail call double @llvm.minnum.f64(double 0.000000e+00, double 0.000000e+00)
%i2 = tail call double @llvm.minnum.f64(double 0.000000e+00, double 0.000000e+00)
%i3 = tail call double @llvm.maxnum.f64(double %i1, double %i2)
%i4 = tail call { double, i32 } @llvm.frexp.f64.i32(double %i)
ret { double, i32 } %i4
}
declare { double, i32 } @llvm.frexp.f64.i32(double) #0
declare double @llvm.maxnum.f64(double, double) #0
declare double @llvm.minnum.f64(double, double) #0
attributes #0 = { nocallback nocreateundeforpoison nofree nosync nounwind speculatable willreturn memory(none) }
```
b.ll:
```
define double @func() {
entry:
%i = tail call double @llvm.fabs.f64(double 0.000000e+00)
%i1 = tail call double @llvm.fabs.f64(double 0.000000e+00)
%i2 = tail call double @llvm.maxnum.f64(double %i, double %i1)
%i3 = tail call double @llvm.maxnum.f64(double %i1, double 0.000000e+00)
%i4 = tail call double @llvm.minnum.f64(double 1.000000e+00, double 0.000000e+00)
%i5 = tail call double @llvm.maxnum.f64(double %i4, double 0.000000e+00)
ret double %i5
}
declare double @llvm.fabs.f64(double) #0
declare double @llvm.maxnum.f64(double, double) #0
declare double @llvm.minnum.f64(double, double) #0
attributes #0 = { nocallback nocreateundeforpoison nofree nosync nounwind speculatable willreturn memory(none) }
```
```
$ llvm-diff a.ll b.ll
function @llvm.frexp.f64.i32 exists only in left module
function @llvm.fabs.f64 exists only in right module
in function func:
in block %entry:
in instruction %i3 / %i2:
arguments %i1 and %i differ
Assertion failed: (!Result && "structural differences second time around?"), function unify, file DifferenceEngine.cpp, line 268.
[1] 30359 abort llvm-diff a.ll b.ll
```
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