xref: /llvm-project/llvm/test/Transforms/SLPVectorizer/reduction-min-select.ll (revision 15ee17c3ce34623261788d7de3c1bdf5860be34e)
1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2; RUN: %if x86-registered-target %{ opt -S -passes=slp-vectorizer -mtriple=x86_64-unknown-linux-gnu < %s | FileCheck %s %}
3; RUN: %if aarch64-registered-target %{ opt -S -passes=slp-vectorizer -mtriple=aarch64-unknown-linux-gnu < %s | FileCheck %s %}
4
5define void @test() {
6; CHECK-LABEL: @test(
7; CHECK-NEXT:  entry:
8; CHECK-NEXT:    br i1 false, label [[IF_ELSE:%.*]], label [[IF_THEN:%.*]]
9; CHECK:       if.then:
10; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 1, 0
11; CHECK-NEXT:    [[SPEC_SELECT:%.*]] = select i1 [[CMP]], i32 1, i32 0
12; CHECK-NEXT:    [[TMP0:%.*]] = call i32 @llvm.smin.i32(i32 [[SPEC_SELECT]], i32 1)
13; CHECK-NEXT:    br label [[IF_END20:%.*]]
14; CHECK:       if.else:
15; CHECK-NEXT:    br label [[IF_END20]]
16; CHECK:       if.end20:
17; CHECK-NEXT:    [[TMP1:%.*]] = phi i32 [ undef, [[IF_ELSE]] ], [ [[TMP0]], [[IF_THEN]] ]
18; CHECK-NEXT:    ret void
19;
20entry:
21  br i1 false, label %if.else, label %if.then
22
23if.then:
24  %cmp = icmp slt i32 1, 0
25  %spec.select = select i1 %cmp, i32 1, i32 0
26  %0 = call i32 @llvm.smin.i32(i32 %spec.select, i32 1)
27  br label %if.end20
28
29if.else:
30  br label %if.end20
31
32if.end20:
33  %1 = phi i32 [ undef, %if.else ], [ %0, %if.then ]
34  ret void
35}
36
37declare i32 @llvm.smin.i32(i32, i32)
38