llvm-6502/test/Transforms/SimplifyCFG/PhiBlockMerge.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

23 lines
667 B
LLVM

; Test merging of blocks that only have PHI nodes in them
;
; RUN: opt < %s -simplifycfg -S | not grep N:
;
define i32 @test(i1 %a, i1 %b) {
; <label>:0
br i1 %a, label %M, label %O
O: ; preds = %0
br i1 %b, label %N, label %Q
Q: ; preds = %O
br label %N
N: ; preds = %Q, %O
; This block should be foldable into M
%Wp = phi i32 [ 0, %O ], [ 1, %Q ] ; <i32> [#uses=1]
br label %M
M: ; preds = %N, %0
%W = phi i32 [ %Wp, %N ], [ 2, %0 ] ; <i32> [#uses=1]
%R = add i32 %W, 1 ; <i32> [#uses=1]
ret i32 %R
}