30 lines
1.1 KiB
LLVM
30 lines
1.1 KiB
LLVM
; RUN: opt -analyze -enable-new-pm=0 -scalar-evolution < %s | FileCheck %s
|
|
; RUN: opt -disable-output "-passes=print<scalar-evolution>" < %s 2>&1 | FileCheck %s
|
|
|
|
%struct.anon = type { i8 }
|
|
%struct.S = type { i32 }
|
|
|
|
@a = common global %struct.anon zeroinitializer, align 1
|
|
@b = common global %struct.S zeroinitializer, align 4
|
|
|
|
; Function Attrs: nounwind ssp uwtable
|
|
define i32 @main() {
|
|
; CHECK-LABEL: Classifying expressions for: @main
|
|
store i8 0, i8* getelementptr inbounds (%struct.anon, %struct.anon* @a, i64 0, i32 0), align 1
|
|
br label %loop
|
|
|
|
loop:
|
|
%storemerge1 = phi i8 [ 0, %0 ], [ %inc, %loop ]
|
|
%m = load volatile i32, i32* getelementptr inbounds (%struct.S, %struct.S* @b, i64 0, i32 0), align 4
|
|
%inc = add nuw i8 %storemerge1, 1
|
|
; CHECK: %inc = add nuw i8 %storemerge1, 1
|
|
; CHECK-NEXT: --> {1,+,1}<nuw><%loop>
|
|
; CHECK-NOT: --> {1,+,1}<nuw><nsw><%loop>
|
|
%exitcond = icmp eq i8 %inc, -128
|
|
br i1 %exitcond, label %exit, label %loop
|
|
|
|
exit:
|
|
store i8 -128, i8* getelementptr inbounds (%struct.anon, %struct.anon* @a, i64 0, i32 0), align 1
|
|
ret i32 0
|
|
}
|