29 lines
974 B
LLVM
29 lines
974 B
LLVM
; RUN: opt -analyze -scalar-evolution < %s | FileCheck %s
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%struct.anon = type { i8 }
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%struct.S = type { i32 }
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@a = common global %struct.anon zeroinitializer, align 1
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@b = common global %struct.S zeroinitializer, align 4
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; Function Attrs: nounwind ssp uwtable
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define i32 @main() {
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; CHECK-LABEL: Classifying expressions for: @main
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store i8 0, i8* getelementptr inbounds (%struct.anon, %struct.anon* @a, i64 0, i32 0), align 1
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br label %loop
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loop:
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%storemerge1 = phi i8 [ 0, %0 ], [ %inc, %loop ]
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%m = load volatile i32, i32* getelementptr inbounds (%struct.S, %struct.S* @b, i64 0, i32 0), align 4
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%inc = add nuw i8 %storemerge1, 1
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; CHECK: %inc = add nuw i8 %storemerge1, 1
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; CHECK-NEXT: --> {1,+,1}<nuw><%loop>
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; CHECK-NOT: --> {1,+,1}<nuw><nsw><%loop>
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%exitcond = icmp eq i8 %inc, -128
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br i1 %exitcond, label %exit, label %loop
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exit:
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store i8 -128, i8* getelementptr inbounds (%struct.anon, %struct.anon* @a, i64 0, i32 0), align 1
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ret i32 0
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}
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