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llvm-mirror/test/Transforms/SimplifyCFG/PhiBlockMerge2.ll
Dan Gohman 8d84372836 Change these tests to feed the assembly files to opt directly, instead
of using llvm-as, now that opt supports this.

llvm-svn: 81226
2009-09-08 16:50:01 +00:00

28 lines
574 B
LLVM

; Test merging of blocks that only have PHI nodes in them. This tests the case
; where the mergedinto block doesn't have any PHI nodes, and is in fact
; dominated by the block-to-be-eliminated
;
; RUN: opt %s -simplifycfg | llvm-dis | not grep N:
;
declare i1 @foo()
define i32 @test(i1 %a, i1 %b) {
%c = call i1 @foo()
br i1 %c, label %N, label %P
P:
%d = call i1 @foo()
br i1 %d, label %N, label %Q
Q:
br label %N
N:
%W = phi i32 [0, %0], [1, %Q], [2, %P]
; This block should be foldable into M
br label %M
M:
%R = add i32 %W, 1
ret i32 %R
}