Imported Upstream version 5.18.0.167

Former-commit-id: 289509151e0fee68a1b591a20c9f109c3c789d3a

external/llvm/test/CodeGen/X86/atomic-flags.ll

@@ -1,61 +0,0 @@
-; RUN: llc < %s -mtriple=x86_64-unknown-unknown -verify-machineinstrs | FileCheck %s
-; RUN: llc < %s -mtriple=i686-unknown-unknown -verify-machineinstrs | FileCheck %s
-
-; Make sure that flags are properly preserved despite atomic optimizations.
-
-define i32 @atomic_and_flags_1(i8* %p, i32 %a, i32 %b) {
-; CHECK-LABEL: atomic_and_flags_1:
-
-  ; Generate flags value, and use it.
-  ; CHECK:      cmpl
-  ; CHECK-NEXT: jne
-  %cmp = icmp eq i32 %a, %b
-  br i1 %cmp, label %L1, label %L2
-
-L1:
-  ; The following pattern will get folded.
-  ; CHECK: incb
-  %1 = load atomic i8, i8* %p seq_cst, align 1
-  %2 = add i8 %1, 1 ; This forces the INC instruction to be generated.
-  store atomic i8 %2, i8* %p release, align 1
-
-  ; Use the comparison result again. We need to rematerialize the comparison
-  ; somehow. This test checks that cmpl gets emitted again, but any
-  ; rematerialization would work (the optimizer used to clobber the flags with
-  ; the add).
-  ; CHECK-NEXT: cmpl
-  ; CHECK-NEXT: jne
-  br i1 %cmp, label %L3, label %L4
-
-L2:
-  ret i32 2
-
-L3:
-  ret i32 3
-
-L4:
-  ret i32 4
-}
-
-; Same as above, but using 2 as immediate to avoid the INC instruction.
-define i32 @atomic_and_flags_2(i8* %p, i32 %a, i32 %b) {
-; CHECK-LABEL: atomic_and_flags_2:
-  ; CHECK:      cmpl
-  ; CHECK-NEXT: jne
-  %cmp = icmp eq i32 %a, %b
-  br i1 %cmp, label %L1, label %L2
-L1:
-  ; CHECK: addb
-  %1 = load atomic i8, i8* %p seq_cst, align 1
-  %2 = add i8 %1, 2
-  store atomic i8 %2, i8* %p release, align 1
-  ; CHECK-NEXT: cmpl
-  ; CHECK-NEXT: jne
-  br i1 %cmp, label %L3, label %L4
-L2:
-  ret i32 2
-L3:
-  ret i32 3
-L4:
-  ret i32 4
-}