llvm/test/Transforms/FunctionSpecialization/dead-gv-load.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
; RUN: opt -passes=ipsccp  --funcspec-min-function-size=1 -S < %s | FileCheck %s

@gv = internal global ptr null

define i8 @caller() {
; CHECK-LABEL: define i8 @caller() {
; CHECK-NEXT:  [[ENTRY:.*:]]
; CHECK-NEXT:    [[CALL1:%.*]] = call i8 @callee.specialized.1(i32 1)
; CHECK-NEXT:    [[CALL2:%.*]] = call i8 @callee.specialized.2(i32 0)
; CHECK-NEXT:    ret i8 undef
;
entry:
  %call1 = call i8 @callee(i32 1)
  %call2 = call i8 @callee(i32 0)
  ret i8 %call2
}

define internal i8 @callee(i32 %arg) {
entry:
  %useless = icmp ne i32 %arg, 0
  br label %loop

loop:                                       ; preds = %loop, %entry
  br label %loop

dead_bb:                                       ; No predecessors!
  %l1 = load ptr, ptr @gv, align 8
  %l2 = load ptr, ptr %l1, align 8
  ret i8 0
}