[PowerPC, test] Fix use of undef FileCheck var

[thopre]

Summary

LLVM test CodeGen/PowerPC/ctrloops-softfloat.ll tries to check for the
absence of sequences of instructions with several CHECK-NOT with one of
those directives using a variable defined in another. However CHECK-NOT
are checked independently so that is using a variable defined in a
pattern that should not occur in the input.

This commit changes occurence of the variable for the regex used in its
definition, thereby making each CHECK-NOT independent.

[nemanjai]

This makes sense. All the test really needs to check is that we are not producing a CTR loop, so probably a simple --implicit-check-not=mtctr would have sufficed. This change works though, thank you. LGTM.

llvm/test/CodeGen/PowerPC/ctrloops-softfloat.ll

; <label>:2                                       ; preds = %2, %0
   %3 = phi double [ 1.100000e+00, %0 ], [ %4, %2 ]
   %i.01 = phi i32 [ 0, %0 ], [ %5, %2 ]
   %4 = fadd double %3, 1.100000e+00
   %5 = add nuw nsw i32 %i.01, 1
   %exitcond = icmp eq i32 %5, 75
   br i1 %exitcond, label %1, label %2
   ; CHECK: bl __adddf3
   ; CHECK: cmplwi
-  ; CHECK-NOT: li [[REG1:[0-9]+]], 175
-  ; CHECK-NOT: mtctr [[REG1]]
+  ; CHECK-NOT: li {{[0-9]+}}, 175
+  ; CHECK-NOT: mtctr {{[0-9]+}}
 }
 
 define void @foo2() #0 {
   store double 1.100000e+00, double* @y, align 8
   store double 1.100000e+00, double* @x, align 8
   br label %2
 
 ; <label>:1                                       ; preds = %2
   %.lcssa = phi double [ %4, %2 ]
   store double %.lcssa, double* @y, align 8
   ret void
 
 ; <label>:2                                       ; preds = %2, %0
   %3 = phi double [ 1.100000e+00, %0 ], [ %4, %2 ]
   %i.01 = phi i32 [ 0, %0 ], [ %5, %2 ]
   %4 = fsub double 1.100000e+00, %3
   %5 = add nuw nsw i32 %i.01, 1
   %exitcond = icmp eq i32 %5, 75
   br i1 %exitcond, label %1, label %2
   ; CHECK: bl __subdf3
   ; CHECK: cmplwi
-  ; CHECK-NOT: li [[REG1:[0-9]+]], 175
-  ; CHECK-NOT: mtctr [[REG1]]
+  ; CHECK-NOT: li {{[0-9]+}}, 175
+  ; CHECK-NOT: mtctr {{[0-9]+}}
 }
 
 define void @foo3() #0 {
   store double 1.100000e+00, double* @y, align 8
   store double 1.100000e+00, double* @x, align 8
   br label %2
 
 ; <label>:1                                       ; preds = %2
   %.lcssa = phi double [ %4, %2 ]
   store double %.lcssa, double* @y, align 8
   ret void
 
 ; <label>:2                                       ; preds = %2, %0
   %3 = phi double [ 1.100000e+00, %0 ], [ %4, %2 ]
   %i.01 = phi i32 [ 0, %0 ], [ %5, %2 ]
   %4 = fmul double %3, 1.100000e+00
   %5 = add nuw nsw i32 %i.01, 1
   %exitcond = icmp eq i32 %5, 75
   br i1 %exitcond, label %1, label %2
   ; CHECK: bl __muldf3
   ; CHECK: cmplwi
-  ; CHECK-NOT: li [[REG1:[0-9]+]], 175
-  ; CHECK-NOT: mtctr [[REG1]]
+  ; CHECK-NOT: li {{[0-9]+}}, 175
+  ; CHECK-NOT: mtctr {{[0-9]+}}
 }
 
 define void @foo4() #0 {
   store double 1.100000e+00, double* @y, align 8
   store double 1.100000e+00, double* @x, align 8
   br label %2
 
 ; <label>:1                                       ; preds = %2
   %.lcssa = phi double [ %4, %2 ]
   store double %.lcssa, double* @y, align 8
   ret void
 
 ; <label>:2                                       ; preds = %2, %0
   %3 = phi double [ 1.100000e+00, %0 ], [ %4, %2 ]
   %i.01 = phi i32 [ 0, %0 ], [ %5, %2 ]
   %4 = fdiv double 1.100000e+00, %3
   %5 = add nuw nsw i32 %i.01, 1
   %exitcond = icmp eq i32 %5, 75
   br i1 %exitcond, label %1, label %2
   ; CHECK: bl __divdf3
   ; CHECK: cmplwi
-  ; CHECK-NOT: li [[REG1:[0-9]+]], 175
-  ; CHECK-NOT: mtctr [[REG1]]
+  ; CHECK-NOT: li {{[0-9]+}}, 175
+  ; CHECK-NOT: mtctr {{[0-9]+}}
 }
 
 attributes #0 = { "use-soft-float"="true" }