Subzero: Delete szdiff.py tests and ERRORS tests.

tests_lit/llvm2ice_tests/phi.ll

 ; This tests some of the subtleties of Phi lowering.  In particular,
 ; it tests that it does the right thing when it tries to enable
 ; compare/branch fusing.
 
 ; TODO(kschimpf) Find out why lc2i must be used.
 ; REQUIRES: allow_llvm_ir_as_input
 ; RUN: %lc2i -i %s --args -O2 --verbose none --phi-edge-split=0 \
 ; RUN:   | llvm-mc -triple=i686-none-nacl -filetype=obj \
 ; RUN:   | llvm-objdump -d -symbolize -x86-asm-syntax=intel - | FileCheck %s
-; RUN: %lc2i -i %s --args --verbose none | FileCheck --check-prefix=ERRORS %s
-; RUN: %lc2i -i %s --insts | %szdiff %s | FileCheck --check-prefix=DUMP %s
 
 define internal i32 @testPhi1(i32 %arg) {
 entry:
   %cmp1 = icmp sgt i32 %arg, 0
   br i1 %cmp1, label %next, label %target
 next:
   br label %target
 target:
   %merge = phi i1 [ %cmp1, %entry ], [ false, %next ]
   %result = zext i1 %merge to i32
@@ skipping 23 matching lines @@
   ret i32 %merge
 }
 ; Test that compare/branch fusing and Phi lowering happens as expected.
 ; CHECK-LABEL: testPhi2
 ; CHECK: mov {{.*}}, 12345
 ; CHECK: cmp {{.*}}, 0
 ; CHECK-NEXT: jle
 ; CHECK: mov [[PHI:.*]], 54321
 ; CHECK: mov {{.*}}, [[PHI]]
 
-; ERRORS-NOT: ICE translation error
-; DUMP-NOT: SZ
-
 ; Test that address mode inference doesn't extend past
 ; multi-definition, non-SSA Phi temporaries.
 define internal i32 @testPhi3(i32 %arg) {
 entry:
   br label %body
 body:
   %merge = phi i32 [ %arg, %entry ], [ %elt, %body ]
   %interior = add i32 %merge, 1000
   %__4 = inttoptr i32 %interior to i32*
   %elt = load i32* %__4, align 1
@@ skipping 27 matching lines @@
 
 ; CHECK-LABEL: testPhi3
 ; CHECK: push [[EBX:.*]]
 ; CHECK: mov {{.*}}, dword ptr [esp
 ; CHECK: mov
 ; CHECK: mov {{.*}}[[ADDR:.*1000]]
 ; CHECK: cmp {{.*}}, 0
 ; CHECK: jne
 ; CHECK: mov {{.*}}[[ADDR]]
 ; CHECK: pop [[EBX]]