| Dan Gohman | 1880092 | 2009-09-11 18:01:28 +0000 | [diff] [blame] | 1 | ; RUN: opt < %s -instcombine -S | grep {call.*llvm.stackrestore} |
| Chris Lattner | c9c81fb | 2008-06-25 05:59:28 +0000 | [diff] [blame] | 2 | ; PR2488 |
| 3 | 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-f80:32:32" |
| 4 | target triple = "i386-pc-linux-gnu" |
| 5 | @p = weak global i8* null ; <i8**> [#uses=2] |
| 6 | |
| 7 | define i32 @main() nounwind { |
| 8 | entry: |
| 9 | %tmp248 = call i8* @llvm.stacksave( ) ; <i8*> [#uses=1] |
| 10 | %tmp2752 = alloca i32 ; <i32*> [#uses=2] |
| 11 | %tmpcast53 = bitcast i32* %tmp2752 to i8* ; <i8*> [#uses=1] |
| 12 | store i32 2, i32* %tmp2752, align 4 |
| 13 | volatile store i8* %tmpcast53, i8** @p, align 4 |
| 14 | br label %bb44 |
| 15 | |
| 16 | bb: ; preds = %bb44 |
| 17 | ret i32 0 |
| 18 | |
| 19 | bb44: ; preds = %bb44, %entry |
| 20 | %indvar = phi i32 [ 0, %entry ], [ %tmp3857, %bb44 ] ; <i32> [#uses=1] |
| 21 | %tmp249 = phi i8* [ %tmp248, %entry ], [ %tmp2, %bb44 ] ; <i8*> [#uses=1] |
| 22 | %tmp3857 = add i32 %indvar, 1 ; <i32> [#uses=3] |
| 23 | call void @llvm.stackrestore( i8* %tmp249 ) |
| 24 | %tmp2 = call i8* @llvm.stacksave( ) ; <i8*> [#uses=1] |
| 25 | %tmp4 = srem i32 %tmp3857, 1000 ; <i32> [#uses=2] |
| 26 | %tmp5 = add i32 %tmp4, 1 ; <i32> [#uses=1] |
| 27 | %tmp27 = alloca i32, i32 %tmp5 ; <i32*> [#uses=3] |
| 28 | %tmpcast = bitcast i32* %tmp27 to i8* ; <i8*> [#uses=1] |
| 29 | store i32 1, i32* %tmp27, align 4 |
| 30 | %tmp34 = getelementptr i32* %tmp27, i32 %tmp4 ; <i32*> [#uses=1] |
| 31 | store i32 2, i32* %tmp34, align 4 |
| 32 | volatile store i8* %tmpcast, i8** @p, align 4 |
| 33 | %exitcond = icmp eq i32 %tmp3857, 999999 ; <i1> [#uses=1] |
| 34 | br i1 %exitcond, label %bb, label %bb44 |
| 35 | } |
| 36 | |
| 37 | declare i8* @llvm.stacksave() nounwind |
| 38 | |
| 39 | declare void @llvm.stackrestore(i8*) nounwind |