Imported Upstream version 5.18.0.167

Former-commit-id: 289509151e0fee68a1b591a20c9f109c3c789d3a

external/llvm/test/Transforms/SimplifyCFG/trapping-load-unreachable.ll

@@ -1,87 +0,0 @@
-; RUN: opt < %s -simplifycfg -S | FileCheck %s
-; PR2967
-
-target datalayout =
-"e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32"
-target triple = "i386-pc-linux-gnu"
-
-define void @test1(i32 %x) nounwind {
-entry:
-        %0 = icmp eq i32 %x, 0          ; <i1> [#uses=1]
-        br i1 %0, label %bb, label %return
-
-bb:             ; preds = %entry
-        %1 = load volatile i32, i32* null
-        unreachable
-        
-        br label %return
-return:         ; preds = %entry
-        ret void
-; CHECK-LABEL: @test1(
-; CHECK: load volatile
-}
-
-; rdar://7958343
-define void @test2() nounwind {
-entry:
-        store i32 4,i32* null
-        ret void
-        
-; CHECK-LABEL: @test2(
-; CHECK: call void @llvm.trap
-; CHECK: unreachable
-}
-
-; PR7369
-define void @test3() nounwind {
-entry:
-        store volatile i32 4, i32* null
-        ret void
-
-; CHECK-LABEL: @test3(
-; CHECK: store volatile i32 4, i32* null
-; CHECK: ret
-}
-
-; Check store before unreachable.
-define void @test4(i1 %C, i32* %P) {
-; CHECK-LABEL: @test4(
-; CHECK: entry:
-; CHECK-NEXT: br i1 %C
-entry:
-  br i1 %C, label %T, label %F
-T:
-  store volatile i32 0, i32* %P
-  unreachable
-F:
-  ret void
-}
-
-; Check cmpxchg before unreachable.
-define void @test5(i1 %C, i32* %P) {
-; CHECK-LABEL: @test5(
-; CHECK: entry:
-; CHECK-NEXT: br i1 %C
-entry:
-  br i1 %C, label %T, label %F
-T:
-  cmpxchg volatile i32* %P, i32 0, i32 1 seq_cst seq_cst
-  unreachable
-F:
-  ret void
-}
-
-; Check atomicrmw before unreachable.
-define void @test6(i1 %C, i32* %P) {
-; CHECK-LABEL: @test6(
-; CHECK: entry:
-; CHECK-NEXT: br i1 %C
-entry:
-  br i1 %C, label %T, label %F
-T:
-  atomicrmw volatile xchg i32* %P, i32 0 seq_cst
-  unreachable
-F:
-  ret void
-}
-