1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2 ; RUN: opt -hardware-loops -S -verify-loop-lcssa %s | FileCheck %s
4 target datalayout = "E-m:e-i64:64-n32:64"
5 target triple = "ppc64-unknown-linux-elf"
7 declare i1 @cond() readnone
9 ; Make sure we do not crash on the test.
14 ; CHECK-NEXT: br label [[WHILE_COND:%.*]]
16 ; CHECK-NEXT: br label [[FOR_BODY:%.*]]
18 ; CHECK-NEXT: br label [[FOR_INC:%.*]]
20 ; CHECK-NEXT: [[C_0:%.*]] = call i1 @cond()
21 ; CHECK-NEXT: br i1 [[C_0]], label [[WHILE_COND25:%.*]], label [[FOR_BODY]]
22 ; CHECK: while.cond25:
23 ; CHECK-NEXT: [[INDVAR:%.*]] = phi i64 [ [[INDVAR_NEXT:%.*]], [[LAND_RHS:%.*]] ], [ 0, [[FOR_INC]] ]
24 ; CHECK-NEXT: [[INDVARS_IV349:%.*]] = phi i64 [ [[INDVARS_IV_NEXT350:%.*]], [[LAND_RHS]] ], [ 50, [[FOR_INC]] ]
25 ; CHECK-NEXT: [[CMP26_NOT:%.*]] = icmp eq i64 [[INDVARS_IV349]], 0
26 ; CHECK-NEXT: br i1 [[CMP26_NOT]], label [[WHILE_END187:%.*]], label [[LAND_RHS]]
28 ; CHECK-NEXT: [[INDVARS_IV_NEXT350]] = add nsw i64 [[INDVARS_IV349]], -1
29 ; CHECK-NEXT: [[C_1:%.*]] = call i1 @cond()
30 ; CHECK-NEXT: [[INDVAR_NEXT]] = add i64 [[INDVAR]], 1
31 ; CHECK-NEXT: br i1 [[C_1]], label [[WHILE_COND25]], label [[WHILE_END:%.*]]
33 ; CHECK-NEXT: [[INDVAR_LCSSA1:%.*]] = phi i64 [ [[INDVAR]], [[LAND_RHS]] ]
34 ; CHECK-NEXT: [[C_2:%.*]] = call i1 @cond()
35 ; CHECK-NEXT: br i1 [[C_2]], label [[WHILE_END187]], label [[WHILE_COND35_PREHEADER:%.*]]
36 ; CHECK: while.cond35.preheader:
37 ; CHECK-NEXT: [[TMP0:%.*]] = mul nsw i64 [[INDVAR_LCSSA1]], -1
38 ; CHECK-NEXT: [[TMP1:%.*]] = add i64 [[TMP0]], 51
39 ; CHECK-NEXT: call void @llvm.set.loop.iterations.i64(i64 [[TMP1]])
40 ; CHECK-NEXT: br label [[WHILE_COND35:%.*]]
41 ; CHECK: while.cond35:
42 ; CHECK-NEXT: [[TMP2:%.*]] = call i1 @llvm.loop.decrement.i64(i64 1)
43 ; CHECK-NEXT: br i1 [[TMP2]], label [[LAND_RHS37:%.*]], label [[IF_END51:%.*]]
45 ; CHECK-NEXT: br label [[WHILE_COND35]]
47 ; CHECK-NEXT: br label [[WHILE_COND_BACKEDGE:%.*]]
48 ; CHECK: while.cond.backedge:
49 ; CHECK-NEXT: br label [[WHILE_COND]]
50 ; CHECK: while.end187:
51 ; CHECK-NEXT: ret void
56 while.cond: ; preds = %while.cond.backedge, %entry
59 for.body: ; preds = %for.inc, %while.cond
62 for.inc: ; preds = %for.body
63 %c.0 = call i1 @cond()
64 br i1 %c.0, label %while.cond25, label %for.body
66 while.cond25: ; preds = %land.rhs, %for.inc
67 %indvars.iv349 = phi i64 [ %indvars.iv.next350, %land.rhs ], [ 50, %for.inc ]
68 %cmp26.not = icmp eq i64 %indvars.iv349, 0
69 br i1 %cmp26.not, label %while.end187, label %land.rhs
71 land.rhs: ; preds = %while.cond25
72 %indvars.iv.next350 = add nsw i64 %indvars.iv349, -1
73 %c.1 = call i1 @cond()
74 br i1 %c.1, label %while.cond25, label %while.end
76 while.end: ; preds = %land.rhs
77 %c.2 = call i1 @cond()
78 br i1 %c.2, label %while.end187, label %while.cond35.preheader
80 while.cond35.preheader: ; preds = %while.end
81 %0 = and i64 %indvars.iv349, 4294967295
82 br label %while.cond35
84 while.cond35: ; preds = %land.rhs37, %while.cond35.preheader
85 %indvars.iv351 = phi i64 [ %0, %while.cond35.preheader ], [ %indvars.iv.next352, %land.rhs37 ]
86 %cmp36 = icmp sgt i64 %indvars.iv351, 0
87 br i1 %cmp36, label %land.rhs37, label %if.end51
89 land.rhs37: ; preds = %while.cond35
90 %indvars.iv.next352 = add nsw i64 %indvars.iv351, -1
91 br label %while.cond35
93 if.end51: ; preds = %while.cond35
94 br label %while.cond.backedge
96 while.cond.backedge: ; preds = %if.end51
99 while.end187: ; preds = %while.end, %while.cond25