Add Om1 lowering with no optimizations

tests_lit/llvm2ice_tests/cmp-opt.ll

Index: tests_lit/llvm2ice_tests/cmp-opt.ll
diff --git a/tests_lit/llvm2ice_tests/cmp-opt.ll b/tests_lit/llvm2ice_tests/cmp-opt.ll
index 15aee2a44ad8b0cae316e046b3ad556b7df33eac..4636b1a202db3f7004c8f85de1eccc9121bbcbfa 100644
--- a/tests_lit/llvm2ice_tests/cmp-opt.ll
+++ b/tests_lit/llvm2ice_tests/cmp-opt.ll
@@ -1,5 +1,8 @@
-; RUIN: %llvm2ice %s | FileCheck %s
-; RUIN: %llvm2ice --verbose none %s | FileCheck --check-prefix=ERRORS %s
+; Simple test of non-fused compare/branch.
+
+; RUIN: %llvm2ice -O2 --verbose none %s | FileCheck %s
+; RUN: %llvm2ice -Om1 --verbose none %s | FileCheck --check-prefix=OPTM1 %s
+; RUN: %llvm2ice --verbose none %s | FileCheck --check-prefix=ERRORS %s
 ; RUN: %szdiff --llvm2ice=%llvm2ice %s | FileCheck --check-prefix=DUMP %s
 
 define void @testBool(i32 %a, i32 %b) {
@@ -25,8 +28,6 @@ if.end7:                                          ; preds = %if.then5, %if.end
 
 declare void @use(i1 zeroext)
 
-; ERRORS-NOT: ICE translation error
-
 ; CHECK:      .globl testBool
 ; Two bool computations
 ; CHECK:      cmp
@@ -38,4 +39,18 @@ declare void @use(i1 zeroext)
 ; CHECK:      cmp
 ; CHECK:      call
 ; CHECK:      ret
+;
+; OPTM1:      .globl testBool
+; Two bool computations
+; OPTM1:      cmp
+; OPTM1:      cmp
+; Test first bool
+; OPTM1:      cmp
+; OPTM1:      call
+; Test second bool
+; OPTM1:      cmp
+; OPTM1:      call
+; OPTM1:      ret
+
+; ERRORS-NOT: ICE translation error
 ; DUMP-NOT: SZ