source: icGREP/icgrep-devel/llvm-3.8.0.src/test/CodeGen/AMDGPU/tti-unroll-prefs.ll @ 5027

Last change on this file since 5027 was 5027, checked in by cameron, 3 years ago

Upgrade to llvm 3.8

File size: 2.1 KB
Line 
1; RUN: opt -loop-unroll -S -mtriple=amdgcn-- -mcpu=SI %s | FileCheck %s
2
3; This IR comes from this OpenCL C code:
4;
5; if (b + 4 > a) {
6;   for (int i = 0; i < 4; i++, b++) {
7;     if (b + 1 <= a)
8;       *(dst + c + b) = 0;
9;     else
10;       break;
11;   }
12; }
13;
14; This test is meant to check that this loop isn't unrolled into more than
15; four iterations.  The loop unrolling preferences we currently use cause this
16; loop to not be unrolled at all, but that may change in the future.
17
18; CHECK-LABEL: @test
19; CHECK: store i8 0, i8 addrspace(1)*
20; CHECK-NOT: store i8 0, i8 addrspace(1)*
21; CHECK: ret void
22define void @test(i8 addrspace(1)* nocapture %dst, i32 %a, i32 %b, i32 %c) {
23entry:
24  %add = add nsw i32 %b, 4
25  %cmp = icmp sgt i32 %add, %a
26  br i1 %cmp, label %for.cond.preheader, label %if.end7
27
28for.cond.preheader:                               ; preds = %entry
29  %cmp313 = icmp slt i32 %b, %a
30  br i1 %cmp313, label %if.then4.lr.ph, label %if.end7.loopexit
31
32if.then4.lr.ph:                                   ; preds = %for.cond.preheader
33  %0 = sext i32 %c to i64
34  br label %if.then4
35
36if.then4:                                         ; preds = %if.then4.lr.ph, %if.then4
37  %i.015 = phi i32 [ 0, %if.then4.lr.ph ], [ %inc, %if.then4 ]
38  %b.addr.014 = phi i32 [ %b, %if.then4.lr.ph ], [ %add2, %if.then4 ]
39  %add2 = add nsw i32 %b.addr.014, 1
40  %1 = sext i32 %b.addr.014 to i64
41  %add.ptr.sum = add nsw i64 %1, %0
42  %add.ptr5 = getelementptr inbounds i8, i8 addrspace(1)* %dst, i64 %add.ptr.sum
43  store i8 0, i8 addrspace(1)* %add.ptr5, align 1
44  %inc = add nsw i32 %i.015, 1
45  %cmp1 = icmp slt i32 %inc, 4
46  %cmp3 = icmp slt i32 %add2, %a
47  %or.cond = and i1 %cmp3, %cmp1
48  br i1 %or.cond, label %if.then4, label %for.cond.if.end7.loopexit_crit_edge
49
50for.cond.if.end7.loopexit_crit_edge:              ; preds = %if.then4
51  br label %if.end7.loopexit
52
53if.end7.loopexit:                                 ; preds = %for.cond.if.end7.loopexit_crit_edge, %for.cond.preheader
54  br label %if.end7
55
56if.end7:                                          ; preds = %if.end7.loopexit, %entry
57  ret void
58}
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