Imported Upstream version 5.18.0.234

Former-commit-id: 8071ec1a8c5eaa9be24b41745add19297608001f

external/llvm/test/Transforms/InstCombine/pr21210.ll

@@ -1,51 +0,0 @@
-; RUN: opt < %s -mtriple=x86_64-unknown-linux-gnu -instcombine -S | FileCheck %s
-; Checks that the select-icmp optimization is safe in two cases
-declare void @foo(i32)
-declare i32 @bar(i32)
-
-; don't replace 'cond' by 'len' in the home block ('bb') that
-; contains the select
-define void @test1(i32 %len) {
-entry:
-  br label %bb
-
-bb:
-  %cmp = icmp ult i32 %len, 8
-  %cond = select i1 %cmp, i32 %len, i32 8
-  call void @foo(i32 %cond)
-  %cmp11 = icmp eq i32 %cond, 8
-  br i1 %cmp11, label %for.end, label %bb
-
-for.end:
-  ret void
-; CHECK: select
-; CHECK: icmp eq i32 %cond, 8
-}
-
-; don't replace 'cond' by 'len' in a block ('b1') that dominates all uses
-; of the select outside the home block ('bb'), but can be reached from the home
-; block on another path ('bb -> b0 -> b1')
-define void @test2(i32 %len) {
-entry:
-  %0 = call i32 @bar(i32 %len);
-  %cmp = icmp ult i32 %len, 4
-  br i1 %cmp, label %bb, label %b1
-bb:
-  %cmp2 = icmp ult i32 %0, 2
-  %cond = select i1 %cmp2, i32 %len, i32 8
-  %cmp3 = icmp eq i32 %cond, 8
-  br i1 %cmp3, label %b0, label %b1
-
-b0:
-  call void @foo(i32 %len)
-  br label %b1
-
-b1:
-; CHECK: phi i32 [ %cond, %bb ], [ undef, %b0 ], [ %0, %entry ]
-  %1 = phi i32 [ %cond, %bb ], [ undef, %b0 ], [ %0, %entry ]
-  br label %ret
-
-ret:
-  call void @foo(i32 %1)
-  ret void
-}