8bc038daf2
Generalize the logic from https://github.com/llvm/llvm-project/pull/153421 to support additional cases where the pointer is only used as integer. Alive2 Proof: https://alive2.llvm.org/ce/z/po58pP This enables vectorizing std::find for some cases, if additional assumptions are provided: https://godbolt.org/z/94oq3576E Depends on https://github.com/llvm/llvm-project/pull/15342. PR: https://github.com/llvm/llvm-project/pull/153566
70 lines
2.1 KiB
LLVM
70 lines
2.1 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
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; RUN: opt -passes=instcombine -S %s | FileCheck %s
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define i64 @inttoptr_used_by_phi_with_ptrtoint(i1 %c, ptr %src, ptr %p2) {
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; CHECK-LABEL: define i64 @inttoptr_used_by_phi_with_ptrtoint(
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; CHECK-SAME: i1 [[C:%.*]], ptr [[SRC:%.*]], ptr [[P2:%.*]]) {
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; CHECK-NEXT: br i1 [[C]], label %[[THEN:.*]], label %[[ELSE:.*]]
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; CHECK: [[THEN]]:
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; CHECK-NEXT: [[P:%.*]] = getelementptr i8, ptr [[SRC]], i64 10
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; CHECK-NEXT: [[TMP1:%.*]] = ptrtoint ptr [[P]] to i64
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; CHECK-NEXT: br label %[[EXIT:.*]]
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; CHECK: [[ELSE]]:
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; CHECK-NEXT: br label %[[EXIT]]
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; CHECK: [[EXIT]]:
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; CHECK-NEXT: [[PHI:%.*]] = phi i64 [ [[TMP1]], %[[THEN]] ], [ 0, %[[ELSE]] ]
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; CHECK-NEXT: ret i64 [[PHI]]
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;
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%i = ptrtoint ptr %src to i64
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%a = add i64 %i, 10
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%p = inttoptr i64 %a to ptr
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br i1 %c, label %then, label %else
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then:
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br label %exit
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else:
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br label %exit
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exit:
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%phi = phi ptr [ %p, %then ], [ null, %else ]
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%i.2 = ptrtoint ptr %phi to i64
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ret i64 %i.2
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}
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declare void @foo(ptr)
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define i64 @inttoptr_used_by_phi_with_other_users(i1 %c, ptr %src, ptr %p2) {
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; CHECK-LABEL: define i64 @inttoptr_used_by_phi_with_other_users(
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; CHECK-SAME: i1 [[C:%.*]], ptr [[SRC:%.*]], ptr [[P2:%.*]]) {
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; CHECK-NEXT: [[I:%.*]] = ptrtoint ptr [[SRC]] to i64
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; CHECK-NEXT: [[A:%.*]] = add i64 [[I]], 10
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; CHECK-NEXT: br i1 [[C]], label %[[THEN:.*]], label %[[ELSE:.*]]
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; CHECK: [[THEN]]:
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; CHECK-NEXT: br label %[[EXIT:.*]]
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; CHECK: [[ELSE]]:
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; CHECK-NEXT: br label %[[EXIT]]
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; CHECK: [[EXIT]]:
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; CHECK-NEXT: [[PHI:%.*]] = phi i64 [ [[A]], %[[THEN]] ], [ 0, %[[ELSE]] ]
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; CHECK-NEXT: [[P:%.*]] = inttoptr i64 [[A]] to ptr
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; CHECK-NEXT: call void @foo(ptr [[P]])
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; CHECK-NEXT: ret i64 [[PHI]]
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;
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%i = ptrtoint ptr %src to i64
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%a = add i64 %i, 10
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%p = inttoptr i64 %a to ptr
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br i1 %c, label %then, label %else
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then:
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br label %exit
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else:
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br label %exit
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exit:
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%phi = phi ptr [ %p, %then ], [ null, %else ]
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call void @foo(ptr %p)
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%i.2 = ptrtoint ptr %phi to i64
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ret i64 %i.2
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}
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