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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 3
; RUN: opt -S -passes=gvn < %s | FileCheck %s
declare void @willreturn() nounwind willreturn
declare void @capture(ptr)
; Make sure ICF is invalidated when the callee becomes known.
define i64 @test(ptr %p) {
; CHECK-LABEL: define i64 @test(
; CHECK-SAME: ptr [[P:%.*]]) {
; CHECK-NEXT: entry:
; CHECK-NEXT: [[A:%.*]] = alloca [2 x ptr], align 8
; CHECK-NEXT: [[A2:%.*]] = getelementptr ptr, ptr [[A]], i64 1
; CHECK-NEXT: call void @capture(ptr [[A]])
; CHECK-NEXT: br i1 false, label [[IF:%.*]], label [[ENTRY_EXIT_CRIT_EDGE:%.*]]
; CHECK: entry.exit_crit_edge:
; CHECK-NEXT: [[RES_PRE:%.*]] = load i64, ptr [[A2]], align 8
; CHECK-NEXT: br label [[EXIT:%.*]]
; CHECK: if:
; CHECK-NEXT: [[P1:%.*]] = load ptr, ptr [[A2]], align 8
; CHECK-NEXT: br label [[EXIT]]
; CHECK: exit:
; CHECK-NEXT: [[RES:%.*]] = phi i64 [ [[RES_PRE]], [[ENTRY_EXIT_CRIT_EDGE]] ], [ poison, [[IF]] ]
; CHECK-NEXT: store ptr @willreturn, ptr [[P]], align 8
; CHECK-NEXT: tail call void @willreturn()
; CHECK-NEXT: ret i64 [[RES]]
;
entry:
%a = alloca [2 x ptr], align 8
%a2 = getelementptr ptr, ptr %a, i64 1
call void @capture(ptr %a)
br i1 false, label %if, label %exit
if:
%p0 = load ptr, ptr %a, align 8
%p1 = load ptr, ptr %a2, align 8
br label %exit
exit:
store ptr @willreturn, ptr %p
%p2 = load ptr, ptr %a, align 8
%pgocount.i = load i64, ptr %p2, align 8
%fn = load ptr, ptr %p
tail call void %fn()
%res = load i64, ptr %a2, align 8
ret i64 %res
}
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