1 ; XFAIL: * 2 ; RUN: opt < %s -basicaa -newgvn -S | FileCheck %s 3 4 ; GVN should eliminate the fully redundant %9 GEP which 5 ; allows DEAD to be removed. This is PR3198. 6 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 ; <[100 x i32]*> [#uses=3] 11 @G = common global i32 0 ; <i32*> [#uses=2] 12 13 define i32 @test(i32 %i) nounwind { 14 entry: 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 18 19 bb: ; preds = %entry 20 %2 = tail call i32 (...) @bar() nounwind ; <i32> [#uses=0] 21 %3 = getelementptr [100 x i32], [100 x i32]* @H, i32 0, i32 %i ; <i32*> [#uses=1] 22 %4 = load i32, i32* %3, align 4 ; <i32> [#uses=1] 23 store i32 %4, i32* @G, align 4 24 br label %bb3 25 26 bb1: ; preds = %entry 27 %5 = tail call i32 (...) @baz() nounwind ; <i32> [#uses=0] 28 %6 = getelementptr [100 x i32], [100 x i32]* @H, i32 0, i32 %i ; <i32*> [#uses=1] 29 %7 = load i32, i32* %6, align 4 ; <i32> [#uses=2] 30 store i32 %7, i32* @G, align 4 31 %8 = icmp eq i32 %7, 0 ; <i1> [#uses=1] 32 br i1 %8, label %bb3, label %bb4 33 34 bb3: ; preds = %bb1, %bb 35 %9 = getelementptr [100 x i32], [100 x i32]* @H, i32 0, i32 %i ; <i32*> [#uses=1] 36 %DEAD = load i32, i32* %9, align 4 ; <i32> [#uses=1] 37 ; CHECK: %DEAD = phi i32 [ 0, %bb1 ], [ %4, %bb ] 38 ret i32 %DEAD 39 40 bb4: ; preds = %bb1 41 ret i32 0 42 } 43 44 declare i32 @foo(...) 45 46 declare i32 @bar(...) 47 48 declare i32 @baz(...) 49
