| ; Diff file with itself, assert no difference by return code |
| ; RUN: llvm-diff %s %s |
| |
| ; Replace %newvar1 with %newvar2 in the phi node. This can only |
| ; be detected to be different once BB1 has been processed. |
| ; RUN: rm -f %t.ll |
| ; RUN: cat %s | sed -e 's/ %newvar1, %BB1 / %newvar2, %BB1 /' > %t.ll |
| ; RUN: not llvm-diff %s %t.ll 2>&1 | FileCheck --check-prefix DIFFERENT-VAR %s |
| |
| ; DIFFERENT-VAR: in function func: |
| ; DIFFERENT-VAR-NEXT: in block %BB0: |
| ; DIFFERENT-VAR-NEXT: > %var = phi i32 [ 0, %ENTRY ], [ %newvar2, %BB1 ] |
| ; DIFFERENT-VAR-NEXT: < %var = phi i32 [ 0, %ENTRY ], [ %newvar1, %BB1 ] |
| define i32 @func() { |
| ENTRY: |
| br label %BB0 |
| |
| BB0: |
| ; When diffing this phi node, we need to detect whether |
| ; %newvar1 is equivalent, which is not known until BB1 has been processed. |
| %var = phi i32 [ 0, %ENTRY ], [ %newvar1, %BB1 ] |
| %cnd = icmp eq i32 %var, 0 |
| br i1 %cnd, label %BB1, label %END |
| |
| BB1: |
| %newvar1 = add i32 %var, 1 |
| %newvar2 = add i32 %var, 2 |
| br label %BB0 |
| |
| END: |
| ; Equivalence of the ret depends on equivalence of %var. |
| ; Even if %var differs, we do not report a diff here, because |
| ; this is an indirect diff caused by another diff. |
| ret i32 %var |
| } |