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; RUN: opt -correlated-propagation -S < %s | FileCheck %s
; Checks that we don't crash on conflicting facts about a value
; (i.e. unreachable code)
; Test that we can handle conflict edge facts
define i8 @test(i8 %a) {
; CHECK-LABEL: @test
%cmp1 = icmp eq i8 %a, 5
br i1 %cmp1, label %next, label %exit
next:
%cmp2 = icmp eq i8 %a, 3
; CHECK: br i1 false, label %dead, label %exit
br i1 %cmp2, label %dead, label %exit
dead:
; CHECK-LABEL: dead:
; CHECK: ret i8 5
; NOTE: undef, or 3 would be equal valid
ret i8 %a
exit:
ret i8 0
}
declare void @llvm.assume(i1)
; Test that we can handle conflicting assume vs edge facts
define i8 @test2(i8 %a) {
; CHECK-LABEL: @test2
%cmp1 = icmp eq i8 %a, 5
call void @llvm.assume(i1 %cmp1)
%cmp2 = icmp eq i8 %a, 3
; CHECK: br i1 false, label %dead, label %exit
br i1 %cmp2, label %dead, label %exit
dead:
ret i8 %a
exit:
ret i8 0
}
define i8 @test3(i8 %a) {
; CHECK-LABEL: @test3
%cmp1 = icmp eq i8 %a, 5
br i1 %cmp1, label %dead, label %exit
dead:
%cmp2 = icmp eq i8 %a, 3
; CHECK: call void @llvm.assume(i1 false)
call void @llvm.assume(i1 %cmp2)
ret i8 %a
exit:
ret i8 0
}
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