2 ; RUN: opt < %s -passes=newgvn -S | FileCheck %s
4 ; GVN should eliminate the fully redundant %9 GEP which
5 ; allows DEAD to be removed. This is PR3198.
7 ; The %7 and %4 loads combine to make %DEAD unneeded.
8 target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
9 target triple = "i386-apple-darwin7"
10 @H = common global [100 x i32] zeroinitializer, align 32 ; <ptr> [#uses=3]
11 @G = common global i32 0 ; <ptr> [#uses=2]
13 define i32 @test(i32 %i) nounwind {
15 %0 = tail call i32 (...) @foo() nounwind ; <i32> [#uses=1]
16 %1 = icmp eq i32 %0, 0 ; <i1> [#uses=1]
17 br i1 %1, label %bb1, label %bb
20 %2 = tail call i32 (...) @bar() nounwind ; <i32> [#uses=0]
21 %3 = getelementptr [100 x i32], ptr @H, i32 0, i32 %i ; <ptr> [#uses=1]
22 %4 = load i32, ptr %3, align 4 ; <i32> [#uses=1]
23 store i32 %4, ptr @G, align 4
27 %5 = tail call i32 (...) @baz() nounwind ; <i32> [#uses=0]
28 %6 = getelementptr [100 x i32], ptr @H, i32 0, i32 %i ; <ptr> [#uses=1]
29 %7 = load i32, ptr %6, align 4 ; <i32> [#uses=2]
30 store i32 %7, ptr @G, align 4
31 %8 = icmp eq i32 %7, 0 ; <i1> [#uses=1]
32 br i1 %8, label %bb3, label %bb4
34 bb3: ; preds = %bb1, %bb
35 %9 = getelementptr [100 x i32], ptr @H, i32 0, i32 %i ; <ptr> [#uses=1]
36 %DEAD = load i32, ptr %9, align 4 ; <i32> [#uses=1]
37 ; CHECK: %DEAD = phi i32 [ 0, %bb1 ], [ %4, %bb ]