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- ; RUN: opt < %s -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 i8* null ; <i8**> [#uses=2]
- define i32 @main() nounwind {
- entry:
- %tmp248 = call i8* @llvm.stacksave( ) ; <i8*> [#uses=1]
- %tmp2752 = alloca i32 ; <i32*> [#uses=2]
- %tmpcast53 = bitcast i32* %tmp2752 to i8* ; <i8*> [#uses=1]
- store i32 2, i32* %tmp2752, align 4
- store volatile i8* %tmpcast53, i8** @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 i8* [ %tmp248, %entry ], [ %tmp2, %bb44 ] ; <i8*> [#uses=1]
- %tmp3857 = add i32 %indvar, 1 ; <i32> [#uses=3]
- call void @llvm.stackrestore( i8* %tmp249 )
- %tmp2 = call i8* @llvm.stacksave( ) ; <i8*> [#uses=1]
- %tmp4 = srem i32 %tmp3857, 1000 ; <i32> [#uses=2]
- %tmp5 = add i32 %tmp4, 1 ; <i32> [#uses=1]
- %tmp27 = alloca i32, i32 %tmp5 ; <i32*> [#uses=3]
- %tmpcast = bitcast i32* %tmp27 to i8* ; <i8*> [#uses=1]
- store i32 1, i32* %tmp27, align 4
- %tmp34 = getelementptr i32, i32* %tmp27, i32 %tmp4 ; <i32*> [#uses=1]
- store i32 2, i32* %tmp34, align 4
- store volatile i8* %tmpcast, i8** @p, align 4
- %exitcond = icmp eq i32 %tmp3857, 999999 ; <i1> [#uses=1]
- br i1 %exitcond, label %bb, label %bb44
- }
- declare i8* @llvm.stacksave() nounwind
- declare void @llvm.stackrestore(i8*) nounwind
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