[InstCombine] auto-generate complete test checks; NFC

Author: rotateright

llvm/test/Transforms/InstCombine/bitreverse-known-bits.ll

@@ -1,21 +1,24 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
 ; RUN: opt < %s -S -instcombine | FileCheck %s
 
 declare i8 @llvm.bitreverse.i8(i8)
 declare i32 @llvm.bitreverse.i32(i32)
 
-; CHECK-LABEL: @test1
-; CHECK: ret i1 true
 define i1 @test1(i32 %arg) {
+; CHECK-LABEL: @test1(
+; CHECK-NEXT:    ret i1 true
+;
   %a = or i32 %arg, 4294901760
   %b = call i32 @llvm.bitreverse.i32(i32 %a)
   %and = and i32 %b, 65535
   %res = icmp eq i32 %and, 65535
   ret i1 %res
 }
 
-; CHECK-LABEL: @test2
-; CHECK: ret i1 true
 define i1 @test2(i32 %arg) {
+; CHECK-LABEL: @test2(
+; CHECK-NEXT:    ret i1 true
+;
   %a = or i32 %arg, 1
   %b = call i32 @llvm.bitreverse.i32(i32 %a)
   %c = and i32 %b, 2147483648
@@ -24,28 +27,33 @@ define i1 @test2(i32 %arg) {
   ret i1 %res
 }
 
-; CHECK-LABEL: @test3
-; CHECK: ret i1 false
 define i1 @test3(i32 %arg) {
+; CHECK-LABEL: @test3(
+; CHECK-NEXT:    ret i1 false
+;
   %a = or i32 %arg, 65536
   %b = call i32 @llvm.bitreverse.i32(i32 %a)
   %and = and i32 %b, 32768
   %res = icmp eq i32 %and, 0
   ret i1 %res
 }
 
-; CHECK-LABEL: @add_bitreverse
-; Make sure we process range metadata on bitreverse
+; known bits for the bitreverse will say the result is in the range [0, 64)
+; but the metadata says [0, 16). So make sure the range metadata wins.
+;    add %reverse, 1111 0000
+; should become
+;    or  %reverse, 1111 0000
+
 define i8 @add_bitreverse(i8 %a) {
+; CHECK-LABEL: @add_bitreverse(
+; CHECK-NEXT:    [[B:%.*]] = and i8 [[A:%.*]], -4
+; CHECK-NEXT:    [[REVERSE:%.*]] = call i8 @llvm.bitreverse.i8(i8 [[B]]), [[RNG0:!range !.*]]
+; CHECK-NEXT:    [[C:%.*]] = or i8 [[REVERSE]], -16
+; CHECK-NEXT:    ret i8 [[C]]
+;
   %b = and i8 %a, 252
-  ; known bits for the bitreverse will say the result is in the range [0, 64)
-  ; but the metadata says [0, 16). So make sure the range metadata wins.
-  ;    add %reverse, 1111 0000
-  ; should become
-  ;    or  %reverse, 1111 0000
   %reverse = call i8 @llvm.bitreverse.i8(i8 %b), !range !1
   %c = add i8 %reverse, -16
-; CHECK: or i8 %reverse, -16
   ret i8 %c
 }
 !1 = !{i8 0, i8 16}