| ; RUN: opt < %s -passes=instcombine -S | grep "call.*llvm.stackrestore" |
| ; PR2488 |
| 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" |
| target triple = "i386-pc-linux-gnu" |
| @p = weak global ptr null ; <ptr> [#uses=2] |
| |
| define i32 @main() nounwind { |
| entry: |
| %tmp248 = call ptr @llvm.stacksave( ) ; <ptr> [#uses=1] |
| %tmp2752 = alloca i32 ; <ptr> [#uses=2] |
| store i32 2, ptr %tmp2752, align 4 |
| store volatile ptr %tmp2752, ptr @p, align 4 |
| br label %bb44 |
| |
| bb: ; preds = %bb44 |
| ret i32 0 |
| |
| bb44: ; preds = %bb44, %entry |
| %indvar = phi i32 [ 0, %entry ], [ %tmp3857, %bb44 ] ; <i32> [#uses=1] |
| %tmp249 = phi ptr [ %tmp248, %entry ], [ %tmp2, %bb44 ] ; <ptr> [#uses=1] |
| %tmp3857 = add i32 %indvar, 1 ; <i32> [#uses=3] |
| call void @llvm.stackrestore( ptr %tmp249 ) |
| %tmp2 = call ptr @llvm.stacksave( ) ; <ptr> [#uses=1] |
| %tmp4 = srem i32 %tmp3857, 1000 ; <i32> [#uses=2] |
| %tmp5 = add i32 %tmp4, 1 ; <i32> [#uses=1] |
| %tmp27 = alloca i32, i32 %tmp5 ; <ptr> [#uses=3] |
| store i32 1, ptr %tmp27, align 4 |
| %tmp34 = getelementptr i32, ptr %tmp27, i32 %tmp4 ; <ptr> [#uses=1] |
| store i32 2, ptr %tmp34, align 4 |
| store volatile ptr %tmp27, ptr @p, align 4 |
| %exitcond = icmp eq i32 %tmp3857, 999999 ; <i1> [#uses=1] |
| br i1 %exitcond, label %bb, label %bb44 |
| } |
| |
| declare ptr @llvm.stacksave() nounwind |
| |
| declare void @llvm.stackrestore(ptr) nounwind |
