mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-11-13 21:05:16 +00:00
f396cc8730
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48529 91177308-0d34-0410-b5e6-96231b3b80d8
20 lines
485 B
LLVM
20 lines
485 B
LLVM
; This test shows a case where SCCP is incorrectly eliminating the PHI node
|
|
; because it thinks it has a constant 0 value, when it really doesn't.
|
|
|
|
; RUN: llvm-as < %s | opt -sccp | llvm-dis | grep phi
|
|
|
|
define i32 @test(i32 %A, i1 %c) {
|
|
bb1:
|
|
br label %BB2
|
|
BB2: ; preds = %BB4, %bb1
|
|
%V = phi i32 [ 0, %bb1 ], [ %A, %BB4 ] ; <i32> [#uses=1]
|
|
br label %BB3
|
|
BB3: ; preds = %BB2
|
|
br i1 %c, label %BB4, label %BB5
|
|
BB4: ; preds = %BB3
|
|
br label %BB2
|
|
BB5: ; preds = %BB3
|
|
ret i32 %V
|
|
}
|
|
|