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