File: load-dead-block.ll

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llvm-toolchain-17 1%3A17.0.6-22
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -S -passes=gvn < %s | FileCheck %s

define i64 @test(ptr noalias %p, ptr noalias %q) {
; CHECK-LABEL: @test(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    store ptr [[Q:%.*]], ptr [[P:%.*]], align 8
; CHECK-NEXT:    br i1 false, label [[IF:%.*]], label [[MERGE:%.*]]
; CHECK:       if:
; CHECK-NEXT:    call void @clobber(ptr [[P]])
; CHECK-NEXT:    br label [[MERGE]]
; CHECK:       merge:
; CHECK-NEXT:    store i64 1, ptr [[Q]], align 4
; CHECK-NEXT:    [[Q3:%.*]] = getelementptr i64, ptr [[Q]], i64 1
; CHECK-NEXT:    store i64 2, ptr [[Q3]], align 4
; CHECK-NEXT:    ret i64 1
;
entry:
  store ptr %q, ptr %p
  br i1 false, label %if, label %merge

if:
  call void @clobber(ptr %p)
  br label %merge

merge:
  %q2 = load ptr, ptr %p
  store i64 1, ptr %q2
  %v = load i64, ptr %q
  %q3 = getelementptr i64, ptr %q, i64 %v
  store i64 2, ptr %q3
  %v2 = load i64, ptr %q
  ret i64 %v2
}

declare void @clobber(ptr %p)