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Add a test for CodeGenPrepare's ability to look through PHI nodes when performing

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addressing mode folding, introduced in r119853.

llvm-svn: 119857
This commit is contained in:
Owen Anderson 2010-11-19 22:34:53 +00:00
parent 563a0d8b6b
commit 5ee547b9d5
1 changed files with 23 additions and 0 deletions
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test/Transforms/CodeGenPrepare/phi.ll Normal file
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; RUN: llc -march=arm < %s | FileCheck %s
; <rdar://problem/8686347>
define i32 @test1(i1 %a, i32* %b) {
; CHECK: test1
entry:
br i1 %a, label %lblock, label %rblock
lblock:
%lbranch = getelementptr i32* %b, i32 1
br label %end
rblock:
%rbranch = getelementptr i32* %b, i32 1
br label %end
end:
; CHECK: ldr r0, [r1, #4]
%gep = phi i32* [%lbranch, %lblock], [%rbranch, %rblock]
%r = load i32* %gep
; CHECK-NEXT: bx lr
ret i32 %r
}