e60d62b90f
Protected pointer field loads/stores should be paired with the intrinsic to avoid unnecessary address escapes. Reviewers: nikic Reviewed By: nikic Pull Request: https://github.com/llvm/llvm-project/pull/151649
39 lines
1.5 KiB
LLVM
39 lines
1.5 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
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; RUN: opt -O2 -S < %s | FileCheck %s
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; Test that no optimization run at -O2 moves the loads into the exit block,
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; as this causes unnecessary address escapes with pointer field protection.
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define ptr @phi_prot_ptr(i1 %sel, ptr %p1, ptr %p2) {
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; CHECK-LABEL: define ptr @phi_prot_ptr(
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; CHECK-SAME: i1 [[SEL:%.*]], ptr readonly [[P1:%.*]], ptr readonly [[P2:%.*]]) local_unnamed_addr #[[ATTR0:[0-9]+]] {
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; CHECK-NEXT: br i1 [[SEL]], label %[[T:.*]], label %[[F:.*]]
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; CHECK: [[T]]:
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; CHECK-NEXT: [[PROTP1:%.*]] = tail call ptr @llvm.protected.field.ptr.p0(ptr [[P1]], i64 1, i1 true)
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; CHECK-NEXT: [[LOAD1:%.*]] = load ptr, ptr [[PROTP1]], align 8
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; CHECK-NEXT: br label %[[EXIT:.*]]
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; CHECK: [[F]]:
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; CHECK-NEXT: [[PROTP2:%.*]] = tail call ptr @llvm.protected.field.ptr.p0(ptr [[P2]], i64 2, i1 true)
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; CHECK-NEXT: [[LOAD2:%.*]] = load ptr, ptr [[PROTP2]], align 8
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; CHECK-NEXT: br label %[[EXIT]]
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; CHECK: [[EXIT]]:
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; CHECK-NEXT: [[RETVAL:%.*]] = phi ptr [ [[LOAD1]], %[[T]] ], [ [[LOAD2]], %[[F]] ]
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; CHECK-NEXT: ret ptr [[RETVAL]]
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;
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br i1 %sel, label %t, label %f
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t:
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%protp1 = call ptr @llvm.protected.field.ptr.p0(ptr %p1, i64 1, i1 true)
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%load1 = load ptr, ptr %protp1
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br label %exit
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f:
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%protp2 = call ptr @llvm.protected.field.ptr.p0(ptr %p2, i64 2, i1 true)
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%load2 = load ptr, ptr %protp2
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br label %exit
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exit:
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%retval = phi ptr [ %load1, %t ], [ %load2, %f ]
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ret ptr %retval
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}
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