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We now thread some impossible condition information with LVI.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86927 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2009-11-12 01:55:20 +00:00
parent 8520149db1
commit a5810add9c
1 changed files with 30 additions and 2 deletions
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32
test/Transforms/JumpThreading/basic.ll
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@ -321,14 +321,42 @@ F2:
}
; Impossible conditional constraints should get threaded. BB3 is dead here.
define i32 @test11(i32 %A) {
; CHECK: @test11
; CHECK-NEXT: icmp
; CHECK-NEXT: br i1 %tmp455, label %BB4, label %BB2
%tmp455 = icmp eq i32 %A, 42
br i1 %tmp455, label %BB1, label %BB2
BB2:
; CHECK: call i32 @f1()
; CHECK-NEXT: call void @f3()
; CHECK-NEXT: ret i32 4
%C = call i32 @f1()
ret i32 %C
BB1:
%tmp459 = icmp eq i32 %A, 43
br i1 %tmp459, label %BB3, label %BB4
BB3:
call i32 @f2()
ret i32 3
BB4:
call void @f3()
ret i32 4
}
;;; Duplicate condition to avoid xor of cond.
;;; TODO: Make this happen.
define i32 @test11(i1 %cond, i1 %cond2) {
define i32 @testXX(i1 %cond, i1 %cond2) {
Entry:
; CHECK: @test11
; CHECK: @testXX
%v1 = call i32 @f1()
br i1 %cond, label %Merge, label %F1