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| ; RUN: opt < %s -gvn -enable-pre -S | FileCheck %s
@H = common global i32 0 ; <i32*> [#uses=2]
@G = common global i32 0 ; <i32*> [#uses=1]
define i32 @test() nounwind {
entry:
%0 = load i32, i32* @H, align 4 ; <i32> [#uses=2]
%1 = call i32 (...) @foo() nounwind ; <i32> [#uses=1]
%2 = icmp ne i32 %1, 0 ; <i1> [#uses=1]
br i1 %2, label %bb, label %bb1
bb: ; preds = %entry
%3 = add i32 %0, 42 ; <i32> [#uses=1]
; CHECK: %.pre = add i32 %0, 42
store i32 %3, i32* @G, align 4
br label %bb1
bb1: ; preds = %bb, %entry
%4 = add i32 %0, 42 ; <i32> [#uses=1]
store i32 %4, i32* @H, align 4
br label %return
; CHECK: %.pre-phi = phi i32 [ %.pre, %entry.bb1_crit_edge ], [ %3, %bb ]
; CHECK-NEXT: store i32 %.pre-phi, i32* @H, align 4
; CHECK-NEXT: ret i32 0
return: ; preds = %bb1
ret i32 0
}
declare i32 @foo(...)
|