xref: /aosp_15_r20/external/llvm/test/Analysis/ScalarEvolution/2009-01-02-SignedNegativeStride.ll (revision 9880d6810fe72a1726cb53787c6711e909410d58)
1*9880d681SAndroid Build Coastguard Worker; RUN: opt < %s -analyze -scalar-evolution | FileCheck %s
2*9880d681SAndroid Build Coastguard Worker; PR3275
3*9880d681SAndroid Build Coastguard Worker
4*9880d681SAndroid Build Coastguard Worker; CHECK: Printing analysis 'Scalar Evolution Analysis' for function 'func_15'
5*9880d681SAndroid Build Coastguard Worker; CHECK-NOT: /u -1
6*9880d681SAndroid Build Coastguard Worker
7*9880d681SAndroid Build Coastguard Worker@g_16 = external global i16		; <i16*> [#uses=3]
8*9880d681SAndroid Build Coastguard Worker@.str = external constant [4 x i8]		; <[4 x i8]*> [#uses=0]
9*9880d681SAndroid Build Coastguard Worker
10*9880d681SAndroid Build Coastguard Workerdefine void @func_15() nounwind {
11*9880d681SAndroid Build Coastguard Workerentry:
12*9880d681SAndroid Build Coastguard Worker	%0 = load i16, i16* @g_16, align 2		; <i16> [#uses=1]
13*9880d681SAndroid Build Coastguard Worker	%1 = icmp sgt i16 %0, 0		; <i1> [#uses=1]
14*9880d681SAndroid Build Coastguard Worker	br i1 %1, label %bb2, label %bb.nph
15*9880d681SAndroid Build Coastguard Worker
16*9880d681SAndroid Build Coastguard Workerbb.nph:		; preds = %entry
17*9880d681SAndroid Build Coastguard Worker	%g_16.promoted = load i16, i16* @g_16		; <i16> [#uses=1]
18*9880d681SAndroid Build Coastguard Worker	br label %bb
19*9880d681SAndroid Build Coastguard Worker
20*9880d681SAndroid Build Coastguard Workerbb:		; preds = %bb1, %bb.nph
21*9880d681SAndroid Build Coastguard Worker	%g_16.tmp.0 = phi i16 [ %g_16.promoted, %bb.nph ], [ %2, %bb1 ]		; <i16> [#uses=1]
22*9880d681SAndroid Build Coastguard Worker	%2 = add i16 %g_16.tmp.0, -1		; <i16> [#uses=3]
23*9880d681SAndroid Build Coastguard Worker	br label %bb1
24*9880d681SAndroid Build Coastguard Worker
25*9880d681SAndroid Build Coastguard Workerbb1:		; preds = %bb
26*9880d681SAndroid Build Coastguard Worker	%3 = icmp sgt i16 %2, 0		; <i1> [#uses=1]
27*9880d681SAndroid Build Coastguard Worker	br i1 %3, label %bb1.bb2_crit_edge, label %bb
28*9880d681SAndroid Build Coastguard Worker
29*9880d681SAndroid Build Coastguard Workerbb1.bb2_crit_edge:		; preds = %bb1
30*9880d681SAndroid Build Coastguard Worker	store i16 %2, i16* @g_16
31*9880d681SAndroid Build Coastguard Worker	br label %bb2
32*9880d681SAndroid Build Coastguard Worker
33*9880d681SAndroid Build Coastguard Workerbb2:		; preds = %bb1.bb2_crit_edge, %entry
34*9880d681SAndroid Build Coastguard Worker	br label %return
35*9880d681SAndroid Build Coastguard Worker
36*9880d681SAndroid Build Coastguard Workerreturn:		; preds = %bb2
37*9880d681SAndroid Build Coastguard Worker	ret void
38*9880d681SAndroid Build Coastguard Worker}
39*9880d681SAndroid Build Coastguard Worker
40*9880d681SAndroid Build Coastguard Workerdeclare i32 @main() nounwind
41*9880d681SAndroid Build Coastguard Worker
42*9880d681SAndroid Build Coastguard Workerdeclare i32 @printf(i8*, ...) nounwind
43*9880d681SAndroid Build Coastguard Worker
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