File: delete-assume-dead-code.ll

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llvm-toolchain-15 1%3A15.0.6-4
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -codegenprepare -S -mtriple=x86_64-linux < %s | FileCheck %s

define i32 @test1(i8* %d) nounwind {
; CHECK-LABEL: @test1(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[L:%.*]] = load i8, i8* [[D:%.*]], align 1
; CHECK-NEXT:    [[TMP0:%.*]] = icmp eq i8 [[L]], 0
; CHECK-NEXT:    [[CONV:%.*]] = zext i1 [[TMP0]] to i32
; CHECK-NEXT:    ret i32 [[CONV]]
;
entry:
  %l = load i8, i8* %d
  %cmp = icmp eq i8 %l, 0
  br i1 %cmp, label %exit, label %if.end

if.end:
  %gep = getelementptr i8, i8* %d, i32 42
  %call = call i64 @foo(i8* %gep) nounwind readonly willreturn
  %cmp2 = icmp ne i64 %call, 0
  call void @llvm.assume(i1 %cmp2)
  br label %exit

exit:
  %conv = zext i1 %cmp to i32
  ret i32 %conv
}

declare i64 @foo(i8*) nounwind readonly willreturn
declare void @llvm.assume(i1 noundef) nounwind willreturn