0fc63d4e64
Similar to loads, PHIs can be used to introduce non-dynamically unique values into the simplification "algorithm". We need to check that PHIs do not carry such a value from one iteration into the next as can cause downstream reasoning to fail, e.g., downstream could think a comparison is equal because the simplified values are equal while they are defined in different loop iterations. Similarly, instructions in cycles are now conservatively treated as non-dynamically unique. We could do better but I'll leave that for the future. The change in AAUnderlyingObjects allows us to ignore dynamically unique when we simply look for underlying objects. The user of that AA should be aware that the result might not be a dynamically unique value.
57 lines
1.8 KiB
LLVM
57 lines
1.8 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --function-signature --scrub-attributes
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; RUN: opt -passes=openmp-opt -S < %s | FileCheck %s
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; TODO: This should have a second test case with a chain load->phi->load->phi
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; A |
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; \-------------/
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%"struct.TS" = type { i32, ptr }
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define weak amdgpu_kernel void @k() {
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; CHECK-LABEL: define {{[^@]+}}@k() {
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; CHECK-NEXT: BB1:
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; CHECK-NEXT: br label [[BB2:%.*]]
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; CHECK: BB2:
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; CHECK-NEXT: [[DOTPRE158_I:%.*]] = phi ptr [ null, [[BB1:%.*]] ], [ [[PRE2:%.*]], [[BB6:%.*]] ]
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; CHECK-NEXT: br i1 false, label [[BB4:%.*]], label [[BB3:%.*]]
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; CHECK: BB3:
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; CHECK-NEXT: br label [[BB4]]
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; CHECK: BB4:
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; CHECK-NEXT: [[PRE1:%.*]] = phi ptr [ [[DOTPRE158_I]], [[BB3]] ], [ null, [[BB2]] ]
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; CHECK-NEXT: br i1 false, label [[BB6]], label [[BB5:%.*]]
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; CHECK: BB5:
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; CHECK-NEXT: [[GEP:%.*]] = getelementptr inbounds [[STRUCT_TS:%.*]], ptr [[DOTPRE158_I]], i64 0, i32 1
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; CHECK-NEXT: [[Q3:%.*]] = load ptr, ptr [[GEP]], align 8
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; CHECK-NEXT: br label [[BB6]]
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; CHECK: BB6:
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; CHECK-NEXT: [[PRE2]] = phi ptr [ null, [[BB4]] ], [ [[Q3]], [[BB5]] ]
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; CHECK-NEXT: br label [[BB2]]
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;
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BB1:
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br label %BB2
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BB2:
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%.pre158.i = phi ptr [ null, %BB1 ], [ %pre2, %BB6 ]
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br i1 false, label %BB4, label %BB3
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BB3:
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br label %BB4
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BB4:
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%pre1 = phi ptr [ %.pre158.i, %BB3 ], [ null, %BB2 ]
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br i1 false, label %BB6, label %BB5
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BB5:
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%gep = getelementptr inbounds %"struct.TS", ptr %pre1, i64 0, i32 1
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%q3 = load ptr, ptr %gep, align 8
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br label %BB6
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BB6:
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%pre2 = phi ptr [ null, %BB4 ], [ %q3, %BB5 ]
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br label %BB2
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}
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!llvm.module.flags = !{!0, !1}
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!0 = !{i32 7, !"openmp", i32 50}
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!1 = !{i32 7, !"openmp-device", i32 50}
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