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llvm-6502/test/Transforms/Mem2Reg/2003-10-05-DeadPHIInsertion.ll
Dan Gohman f2f6ce65b7 Change tests from "opt %s" to "opt < %s" so that opt doesn't see the
input filename so that opt doesn't print the input filename in the
output so that grep lines in the tests don't unintentionally match
strings in the input filename.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81537 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-11 18:01:28 +00:00

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603 B
LLVM

; Mem2reg should not insert dead PHI nodes! The naive algorithm inserts a PHI
; node in L3, even though there is no load of %A in anything dominated by L3.
; RUN: opt < %s -mem2reg -S | not grep phi
define void @test(i32 %B, i1 %C) {
%A = alloca i32 ; <i32*> [#uses=4]
store i32 %B, i32* %A
br i1 %C, label %L1, label %L2
L1: ; preds = %0
store i32 %B, i32* %A
%D = load i32* %A ; <i32> [#uses=1]
call void @test( i32 %D, i1 false )
br label %L3
L2: ; preds = %0
%E = load i32* %A ; <i32> [#uses=1]
call void @test( i32 %E, i1 true )
br label %L3
L3: ; preds = %L2, %L1
ret void
}