[Test] Underscored fieldsensitive_multidefuse_liverange.

Use underscores rather than hyphens so that text editors understand the
name as a single word.

Author: nate-chandler

lib/SIL/Utils/FieldSensitivePrunedLiveness.cpp

@@ -1212,7 +1212,7 @@ namespace swift::test {
 // locations. In that case, the def nodes may be stores and the uses may be
 // destroy_addrs.
 static FunctionTest FieldSensitiveMultiDefUseLiveRangeTest(
-    "fieldsensitive-multidefuse-liverange",
+    "fieldsensitive_multidefuse_liverange",
     [](auto &function, auto &arguments, auto &test) {
       SmallVector<SILBasicBlock *, 8> discoveredBlocks;
       auto value = arguments.takeValue();

test/SILOptimizer/field_sensitive_liverange_unit.sil

@@ -9,7 +9,7 @@ sil @getC : $@convention(thin) () -> (@owned C)
 //
 // This live range is not dominated by the original borrow.
 //
-// CHECK-LABEL: testReborrow: fieldsensitive-multidefuse-liverange
+// CHECK-LABEL: testReborrow: fieldsensitive_multidefuse_liverange
 // CHECK: FieldSensitive MultiDef lifetime analysis:
 // CHECK:   def in range [0, 1) value:   [[B:%.*]] = load_borrow %0 : $*C
 // CHECK:   def in range [0, 1) value:   [[RB:%.*]] = borrowed {{.*}} from
@@ -23,7 +23,7 @@ sil @getC : $@convention(thin) () -> (@owned C)
 sil [ossa] @testReborrow : $@convention(thin) () -> () {
 bb0:
   specify_test """
-                     fieldsensitive-multidefuse-liverange
+                     fieldsensitive_multidefuse_liverange
                      @instruction
                      defs: 
                      @trace[0] 0 1
@@ -75,7 +75,7 @@ bb4:
 sil [ossa] @testMultiDefUseAddressReinit : $@convention(thin) (@owned C) -> () {
 bb0(%0: @owned $C):
   specify_test """
-                     fieldsensitive-multidefuse-liverange
+                     fieldsensitive_multidefuse_liverange
                      @instruction
                      defs: 
                      @instruction[+2] 0 1
@@ -110,7 +110,7 @@ bb3:
 // boundary. Once as a last use, and once as a dead def.
 // This is a particularly problematic corner case.
 //
-// CHECK-LABEL: testDeadSelfKill: fieldsensitive-multidefuse-liverange
+// CHECK-LABEL: testDeadSelfKill: fieldsensitive_multidefuse_liverange
 // CHECK: FieldSensitive MultiDef lifetime analysis:
 // CHECK: def in range [0, 1) instruction: store {{%[^,]+}} to [init] [[STACK:%[^,]+]] :
 // CHECK: def in range [0, 1) instruction: store {{%[^,]+}} to [assign] [[STACK]]
@@ -123,7 +123,7 @@ bb0:
 
 bb1(%1 : @owned $C, %2 : @owned $C):
   specify_test """
-                     fieldsensitive-multidefuse-liverange
+                     fieldsensitive_multidefuse_liverange
                      @instruction
                      defs: 
                      @instruction[+1] 0 1
@@ -144,7 +144,7 @@ bb3:
 // A dead-end block with a def can still be a boundary edge. This can
 // only happen in OSSA with incomplete lifetimes.
 //
-// CHECK-LABEL: testMultiDefDeadDefBoundaryEdge: fieldsensitive-multidefuse-liverange
+// CHECK-LABEL: testMultiDefDeadDefBoundaryEdge: fieldsensitive_multidefuse_liverange
 // CHECK: FieldSensitive MultiDef lifetime analysis:
 // CHECK:   def in range [0, 1) instruction: store {{%[^,]+}} to [init] [[STACK:%[^,]+]] :
 // CHECK:   def in range [0, 1) instruction: store {{%[^,]+}} to [assign] [[STACK]]
@@ -164,7 +164,7 @@ bb0:
   %c = apply %getC() : $@convention(thin) () -> (@owned C)
   store %c to [init] %stack : $*C
   specify_test """
-                     fieldsensitive-multidefuse-liverange
+                     fieldsensitive_multidefuse_liverange
                      @instruction[-3]
                      defs: 
                      @instruction[-1] 0 1