[SCEV] Generate test checks (NFC)

Author: nikic

llvm/test/Analysis/ScalarEvolution/trunc-simplify.ll

@@ -1,45 +1,63 @@
+; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py UTC_ARGS: --version 5
 ; RUN: opt < %s -disable-output "-passes=print<scalar-evolution>" 2>&1 | FileCheck %s
 
 ; Check that we convert
 ;   trunc(C * a) -> trunc(C) * trunc(a)
 ; if C is a constant.
-; CHECK-LABEL: @trunc_of_mul
 define i8 @trunc_of_mul(i32 %a) {
+; CHECK-LABEL: 'trunc_of_mul'
+; CHECK-NEXT:  Classifying expressions for: @trunc_of_mul
+; CHECK-NEXT:    %b = mul i32 %a, 100
+; CHECK-NEXT:    --> (100 * %a) U: [0,-3) S: [-2147483648,2147483645)
+; CHECK-NEXT:    %c = trunc i32 %b to i8
+; CHECK-NEXT:    --> (100 * (trunc i32 %a to i8)) U: [0,-3) S: [-128,125)
+; CHECK-NEXT:  Determining loop execution counts for: @trunc_of_mul
+;
   %b = mul i32 %a, 100
-  ; CHECK: %c
-  ; CHECK-NEXT: --> (100 * (trunc i32 %a to i8))
   %c = trunc i32 %b to i8
   ret i8 %c
 }
 
 ; Check that we convert
 ;   trunc(C + a) -> trunc(C) + trunc(a)
 ; if C is a constant.
-; CHECK-LABEL: @trunc_of_add
 define i8 @trunc_of_add(i32 %a) {
+; CHECK-LABEL: 'trunc_of_add'
+; CHECK-NEXT:  Classifying expressions for: @trunc_of_add
+; CHECK-NEXT:    %b = add i32 %a, 100
+; CHECK-NEXT:    --> (100 + %a) U: full-set S: full-set
+; CHECK-NEXT:    %c = trunc i32 %b to i8
+; CHECK-NEXT:    --> (100 + (trunc i32 %a to i8)) U: full-set S: full-set
+; CHECK-NEXT:  Determining loop execution counts for: @trunc_of_add
+;
   %b = add i32 %a, 100
-  ; CHECK: %c
-  ; CHECK-NEXT: --> (100 + (trunc i32 %a to i8))
   %c = trunc i32 %b to i8
   ret i8 %c
 }
 
 ; Check that we truncate to zero values assumed to have at least as many
 ; trailing zeros as the target type.
-; CHECK-LABEL: @trunc_to_assumed_zeros
 define i8 @trunc_to_assumed_zeros(ptr %p) {
+; CHECK-LABEL: 'trunc_to_assumed_zeros'
+; CHECK-NEXT:  Classifying expressions for: @trunc_to_assumed_zeros
+; CHECK-NEXT:    %a = load i32, ptr %p, align 4
+; CHECK-NEXT:    --> %a U: [0,-255) S: [-2147483648,2147483393)
+; CHECK-NEXT:    %and = and i32 %a, 255
+; CHECK-NEXT:    --> 0 U: [0,1) S: [0,1)
+; CHECK-NEXT:    %c = trunc i32 %a to i8
+; CHECK-NEXT:    --> 0 U: [0,1) S: [0,1)
+; CHECK-NEXT:    %d = trunc i32 %a to i1
+; CHECK-NEXT:    --> false U: [0,-1) S: [0,-1)
+; CHECK-NEXT:    %e = trunc i32 %a to i16
+; CHECK-NEXT:    --> (trunc i32 %a to i16) U: [0,-255) S: [-32768,32513)
+; CHECK-NEXT:  Determining loop execution counts for: @trunc_to_assumed_zeros
+;
   %a = load i32, ptr %p
   %and = and i32 %a, 255
   %cmp = icmp eq i32 %and, 0
   tail call void @llvm.assume(i1 %cmp)
-  ; CHECK: %c
-  ; CHECK-NEXT: --> 0
   %c = trunc i32 %a to i8
-  ; CHECK: %d
-  ; CHECK-NEXT: --> false
   %d = trunc i32 %a to i1
-  ; CHECK: %e
-  ; CHECK-NEXT: --> (trunc i32 %a to i16)
   %e = trunc i32 %a to i16
   ret i8 %c
 }