[llvm] 1968f76 - [Test] Add LICM test for PR55672 showing problem with freeze instruction

[Max Kazantsev via llvm-commits]

Author: Max Kazantsev
Date: 2022-05-24T17:17:46+07:00
New Revision: 1968f765c359304860b063ebe51cee2544433728

URL: https://github.com/llvm/llvm-project/commit/1968f765c359304860b063ebe51cee2544433728
DIFF: https://github.com/llvm/llvm-project/commit/1968f765c359304860b063ebe51cee2544433728.diff

LOG: [Test] Add LICM test for PR55672 showing problem with freeze instruction

Added: 
    llvm/test/Transforms/LICM/pr55672.ll

Modified: 
    

Removed: 
    


################################################################################
diff  --git a/llvm/test/Transforms/LICM/pr55672.ll b/llvm/test/Transforms/LICM/pr55672.ll
new file mode 100644
index 0000000000000..479bd39f35e71
--- /dev/null
+++ b/llvm/test/Transforms/LICM/pr55672.ll
@@ -0,0 +1,105 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt -S -passes='licm' < %s | FileCheck %s
+
+define void @test_01(i8 addrspace(1)* addrspace(1)* %arg, i32 %arg2) {
+; CHECK-LABEL: @test_01(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    [[TMP103:%.*]] = load atomic i8 addrspace(1)*, i8 addrspace(1)* addrspace(1)* [[ARG:%.*]] unordered, align 8, !dereferenceable_or_null !0, !align !1
+; CHECK-NEXT:    [[TMP117:%.*]] = icmp eq i8 addrspace(1)* [[TMP103]], null
+; CHECK-NEXT:    [[TMP118:%.*]] = getelementptr inbounds i8, i8 addrspace(1)* [[TMP103]], i64 8
+; CHECK-NEXT:    [[TMP119:%.*]] = bitcast i8 addrspace(1)* [[TMP118]] to i32 addrspace(1)*
+; CHECK-NEXT:    br i1 [[TMP117]], label [[FAIL:%.*]], label [[PREHEADER:%.*]]
+; CHECK:       fail:
+; CHECK-NEXT:    ret void
+; CHECK:       preheader:
+; CHECK-NEXT:    [[TMP157:%.*]] = load atomic i32, i32 addrspace(1)* [[TMP119]] unordered, align 8
+; CHECK-NEXT:    br label [[LOOP:%.*]]
+; CHECK:       loop:
+; CHECK-NEXT:    [[TMP151:%.*]] = phi i32 [ 0, [[PREHEADER]] ], [ [[TMP163:%.*]], [[LOOP]] ]
+; CHECK-NEXT:    [[TMP152:%.*]] = icmp ult i32 [[TMP151]], [[ARG2:%.*]]
+; CHECK-NEXT:    call void (i1, ...) @llvm.experimental.guard(i1 [[TMP152]]) [ "deopt"() ]
+; CHECK-NEXT:    [[TMP158:%.*]] = icmp ult i32 [[TMP151]], [[TMP157]]
+; CHECK-NEXT:    call void (i1, ...) @llvm.experimental.guard(i1 [[TMP158]]) [ "deopt"() ]
+; CHECK-NEXT:    [[TMP163]] = add i32 [[TMP151]], 1
+; CHECK-NEXT:    br label [[LOOP]]
+;
+entry:
+  %tmp103 = load atomic i8 addrspace(1)*, i8 addrspace(1)* addrspace(1)* %arg unordered, align 8, !dereferenceable_or_null !0, !align !1
+  %tmp117 = icmp eq i8 addrspace(1)* %tmp103, null
+  %tmp118 = getelementptr inbounds i8, i8 addrspace(1)* %tmp103, i64 8
+  %tmp119 = bitcast i8 addrspace(1)* %tmp118 to i32 addrspace(1)*
+  br i1 %tmp117, label %fail, label %preheader
+
+fail:                                             ; preds = %entry
+  ret void
+
+preheader:                                        ; preds = %bb
+  br label %loop
+
+loop:                                             ; preds = %loop, %preheader
+  %tmp151 = phi i32 [ 0, %preheader ], [ %tmp163, %loop ]
+  %tmp152 = icmp ult i32 %tmp151, %arg2
+  call void (i1, ...) @llvm.experimental.guard(i1 %tmp152) [ "deopt"() ]
+  %tmp157 = load atomic i32, i32 addrspace(1)* %tmp119 unordered, align 8
+  %tmp158 = icmp ult i32 %tmp151, %tmp157
+  call void (i1, ...) @llvm.experimental.guard(i1 %tmp158) [ "deopt"() ]
+  %tmp163 = add i32 %tmp151, 1
+  br label %loop
+}
+
+; FIXME: should be able to hoist load just as test_01
+define void @test_02(i8 addrspace(1)* addrspace(1)* %arg, i32 %arg2) {
+; CHECK-LABEL: @test_02(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    [[TMP103:%.*]] = load atomic i8 addrspace(1)*, i8 addrspace(1)* addrspace(1)* [[ARG:%.*]] unordered, align 8, !dereferenceable_or_null !0, !align !1
+; CHECK-NEXT:    [[TMP117:%.*]] = icmp eq i8 addrspace(1)* [[TMP103]], null
+; CHECK-NEXT:    [[TMP118:%.*]] = getelementptr inbounds i8, i8 addrspace(1)* [[TMP103]], i64 8
+; CHECK-NEXT:    [[TMP119:%.*]] = bitcast i8 addrspace(1)* [[TMP118]] to i32 addrspace(1)*
+; CHECK-NEXT:    [[FREEZE:%.*]] = freeze i1 [[TMP117]]
+; CHECK-NEXT:    br i1 [[FREEZE]], label [[FAIL:%.*]], label [[PREHEADER:%.*]]
+; CHECK:       fail:
+; CHECK-NEXT:    ret void
+; CHECK:       preheader:
+; CHECK-NEXT:    br label [[LOOP:%.*]]
+; CHECK:       loop:
+; CHECK-NEXT:    [[TMP151:%.*]] = phi i32 [ 0, [[PREHEADER]] ], [ [[TMP163:%.*]], [[LOOP]] ]
+; CHECK-NEXT:    [[TMP152:%.*]] = icmp ult i32 [[TMP151]], [[ARG2:%.*]]
+; CHECK-NEXT:    call void (i1, ...) @llvm.experimental.guard(i1 [[TMP152]]) [ "deopt"() ]
+; CHECK-NEXT:    [[TMP157:%.*]] = load atomic i32, i32 addrspace(1)* [[TMP119]] unordered, align 8
+; CHECK-NEXT:    [[TMP158:%.*]] = icmp ult i32 [[TMP151]], [[TMP157]]
+; CHECK-NEXT:    call void (i1, ...) @llvm.experimental.guard(i1 [[TMP158]]) [ "deopt"() ]
+; CHECK-NEXT:    [[TMP163]] = add i32 [[TMP151]], 1
+; CHECK-NEXT:    br label [[LOOP]]
+;
+entry:
+  %tmp103 = load atomic i8 addrspace(1)*, i8 addrspace(1)* addrspace(1)* %arg unordered, align 8, !dereferenceable_or_null !0, !align !1
+  %tmp117 = icmp eq i8 addrspace(1)* %tmp103, null
+  %tmp118 = getelementptr inbounds i8, i8 addrspace(1)* %tmp103, i64 8
+  %tmp119 = bitcast i8 addrspace(1)* %tmp118 to i32 addrspace(1)*
+  %freeze = freeze i1 %tmp117
+  br i1 %freeze, label %fail, label %preheader
+
+fail:                                             ; preds = %entry
+  ret void
+
+preheader:                                        ; preds = %entry
+  br label %loop
+
+loop:                                             ; preds = %loop, %preheader
+  %tmp151 = phi i32 [ 0, %preheader ], [ %tmp163, %loop ]
+  %tmp152 = icmp ult i32 %tmp151, %arg2
+  call void (i1, ...) @llvm.experimental.guard(i1 %tmp152) [ "deopt"() ]
+  %tmp157 = load atomic i32, i32 addrspace(1)* %tmp119 unordered, align 8
+  %tmp158 = icmp ult i32 %tmp151, %tmp157
+  call void (i1, ...) @llvm.experimental.guard(i1 %tmp158) [ "deopt"() ]
+  %tmp163 = add i32 %tmp151, 1
+  br label %loop
+}
+
+; Function Attrs: nocallback nofree nosync willreturn
+declare void @llvm.experimental.guard(i1, ...) #0
+
+attributes #0 = { nocallback nofree nosync willreturn }
+
+!0 = !{i64 16}
+!1 = !{i64 8}