File: hoist_instr.ll

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llvm-toolchain-3.9 1%3A3.9.1-8
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; RUN: opt < %s -instcombine -S | FileCheck %s

;; This tests that the div is hoisted into the then block.
define i32 @foo(i1 %C, i32 %A, i32 %B) {
entry:
        br i1 %C, label %then, label %endif

then:           ; preds = %entry
; CHECK: then:
; CHECK-NEXT: sdiv i32
        br label %endif

endif:          ; preds = %then, %entry
        %X = phi i32 [ %A, %then ], [ 15, %entry ]              ; <i32> [#uses=1]
        %Y = sdiv i32 %X, 42            ; <i32> [#uses=1]
        ret i32 %Y
}