[llvm] 14d45e4 - [test] Update precommit tests for D108734

[Arthur Eubanks via llvm-commits]

Author: Arthur Eubanks
Date: 2021-08-26T12:05:56-07:00
New Revision: 14d45e41bf8198ce7c43696c284b69222861b1fd

URL: https://github.com/llvm/llvm-project/commit/14d45e41bf8198ce7c43696c284b69222861b1fd
DIFF: https://github.com/llvm/llvm-project/commit/14d45e41bf8198ce7c43696c284b69222861b1fd.diff

LOG: [test] Update precommit tests for D108734

Added: 
    

Modified: 
    llvm/test/Transforms/InstCombine/invariant.group.ll

Removed: 
    


################################################################################
diff  --git a/llvm/test/Transforms/InstCombine/invariant.group.ll b/llvm/test/Transforms/InstCombine/invariant.group.ll
index 7480242ee0960..76605c05a784d 100644
--- a/llvm/test/Transforms/InstCombine/invariant.group.ll
+++ b/llvm/test/Transforms/InstCombine/invariant.group.ll
@@ -159,31 +159,59 @@ define i16 addrspace(42)* @skipWithDifferentTypesDifferentAddrspace(i8* %a) {
   ret i16 addrspace(42)* %a3
 }
 
-define i1 @icmp1(i8* %a) {
-; CHECK-LABEL: @icmp1(
+define i1 @icmp_launder(i8* %a) {
+; CHECK-LABEL: @icmp_launder(
 ; CHECK-NEXT:    [[A2:%.*]] = call i8* @llvm.launder.invariant.group.p0i8(i8* [[A:%.*]])
-; CHECK-NEXT:    [[TMP1:%.*]] = call i8* @llvm.strip.invariant.group.p0i8(i8* [[A]])
-; CHECK-NEXT:    [[R:%.*]] = icmp eq i8* [[A2]], [[TMP1]]
+; CHECK-NEXT:    [[R:%.*]] = icmp eq i8* [[A2]], null
 ; CHECK-NEXT:    ret i1 [[R]]
 ;
   %a2 = call i8* @llvm.launder.invariant.group.p0i8(i8* %a)
-  %a3 = call i8* @llvm.strip.invariant.group.p0i8(i8* %a2)
-  %r = icmp eq i8* %a2, %a3
+  %r = icmp eq i8* %a2, null
   ret i1 %r
 }
 
-define i1 @icmp2(i8* %a, i8* %b) {
-; CHECK-LABEL: @icmp2(
-; CHECK-NEXT:    [[TMP1:%.*]] = call i8* @llvm.strip.invariant.group.p0i8(i8* [[A:%.*]])
-; CHECK-NEXT:    [[TMP2:%.*]] = call i8* @llvm.launder.invariant.group.p0i8(i8* [[B:%.*]])
-; CHECK-NEXT:    [[R:%.*]] = icmp eq i8* [[TMP1]], [[TMP2]]
+define i1 @icmp_strip(i8* %a) {
+; CHECK-LABEL: @icmp_strip(
+; CHECK-NEXT:    [[A2:%.*]] = call i8* @llvm.strip.invariant.group.p0i8(i8* [[A:%.*]])
+; CHECK-NEXT:    [[R:%.*]] = icmp eq i8* [[A2]], null
+; CHECK-NEXT:    ret i1 [[R]]
+;
+  %a2 = call i8* @llvm.strip.invariant.group.p0i8(i8* %a)
+  %r = icmp eq i8* %a2, null
+  ret i1 %r
+}
+
+define i1 @icmp_launder_valid_null(i8* %a) #0 {
+; CHECK-LABEL: @icmp_launder_valid_null(
+; CHECK-NEXT:    [[A2:%.*]] = call i8* @llvm.launder.invariant.group.p0i8(i8* [[A:%.*]])
+; CHECK-NEXT:    [[R:%.*]] = icmp eq i8* [[A2]], null
 ; CHECK-NEXT:    ret i1 [[R]]
 ;
   %a2 = call i8* @llvm.launder.invariant.group.p0i8(i8* %a)
-  %a3 = call i8* @llvm.strip.invariant.group.p0i8(i8* %a2)
-  %b2 = call i8* @llvm.strip.invariant.group.p0i8(i8* %b)
-  %b3 = call i8* @llvm.launder.invariant.group.p0i8(i8* %b2)
-  %r = icmp eq i8* %a3, %b3
+  %r = icmp eq i8* %a2, null
+  ret i1 %r
+}
+
+define i1 @icmp_strip_valid_null(i8* %a) #0 {
+; CHECK-LABEL: @icmp_strip_valid_null(
+; CHECK-NEXT:    [[A2:%.*]] = call i8* @llvm.strip.invariant.group.p0i8(i8* [[A:%.*]])
+; CHECK-NEXT:    [[R:%.*]] = icmp eq i8* [[A2]], null
+; CHECK-NEXT:    ret i1 [[R]]
+;
+  %a2 = call i8* @llvm.strip.invariant.group.p0i8(i8* %a)
+  %r = icmp eq i8* %a2, null
+  ret i1 %r
+}
+
+; Check that null always becomes the RHS
+define i1 @icmp_launder_lhs(i8* %a) {
+; CHECK-LABEL: @icmp_launder_lhs(
+; CHECK-NEXT:    [[A2:%.*]] = call i8* @llvm.launder.invariant.group.p0i8(i8* [[A:%.*]])
+; CHECK-NEXT:    [[R:%.*]] = icmp eq i8* [[A2]], null
+; CHECK-NEXT:    ret i1 [[R]]
+;
+  %a2 = call i8* @llvm.launder.invariant.group.p0i8(i8* %a)
+  %r = icmp eq i8* null, %a2
   ret i1 %r
 }