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testcase for my previous commit. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60315 91177308-0d34-0410-b5e6-96231b3b80d8 Chris Lattner 10 years ago
1 changed file(s) with 42 addition(s) and 0 deletion(s). Raw diff Collapse all Expand all
0 ; RUN: llvm-as < %s | opt -gvn | llvm-dis | grep {DEAD.rle = phi i32}
1 ; The %7 and %4 loads combine to make %DEAD unneeded.
2 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"
3 target triple = "i386-apple-darwin7"
4 @H = common global [100 x i32] zeroinitializer, align 32 ; <[100 x i32]*> [#uses=3]
5 @G = common global i32 0 ; [#uses=2]
6
7 define i32 @test(i32 %i) nounwind {
8 entry:
9 %0 = tail call i32 (...)* @foo() nounwind ; [#uses=1]
10 %1 = icmp eq i32 %0, 0 ; [#uses=1]
11 br i1 %1, label %bb1, label %bb
12
13 bb: ; preds = %entry
14 %2 = tail call i32 (...)* @bar() nounwind ; [#uses=0]
15 %3 = getelementptr [100 x i32]* @H, i32 0, i32 %i ; [#uses=1]
16 %4 = load i32* %3, align 4 ; [#uses=1]
17 store i32 %4, i32* @G, align 4
18 br label %bb3
19
20 bb1: ; preds = %entry
21 %5 = tail call i32 (...)* @baz() nounwind ; [#uses=0]
22 %6 = getelementptr [100 x i32]* @H, i32 0, i32 %i ; [#uses=1]
23 %7 = load i32* %6, align 4 ; [#uses=2]
24 store i32 %7, i32* @G, align 4
25 %8 = icmp eq i32 %7, 0 ; [#uses=1]
26 br i1 %8, label %bb3, label %bb4
27
28 bb3: ; preds = %bb1, %bb
29 %9 = getelementptr [100 x i32]* @H, i32 0, i32 %i ; [#uses=1]
30 %DEAD = load i32* %9, align 4 ; [#uses=1]
31 ret i32 %DEAD
32
33 bb4: ; preds = %bb1
34 ret i32 0
35 }
36
37 declare i32 @foo(...)
38
39 declare i32 @bar(...)
40
41 declare i32 @baz(...)