1 files changed, 230 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/X86/csr-split.ll b/llvm/test/CodeGen/X86/csr-split.ll
new file mode 100644
index 00000000000..9bd480338aa
--- /dev/null
+++ b/llvm/test/CodeGen/X86/csr-split.ll
@@ -0,0 +1,230 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc -verify-machineinstrs -mtriple=x86_64-unknown-linux < %s | FileCheck %s
+; RUN: llc -verify-machineinstrs -mtriple=i386-unknown-linux < %s | FileCheck %s --check-prefix=CHECK-32BIT
+
+; Check CSR split can work properly for tests below.
+
+@a = common dso_local local_unnamed_addr global i32 0, align 4
+
+define dso_local signext i32 @test1(i32* %b) local_unnamed_addr  {
+; CHECK-LABEL: test1:
+; CHECK:       # %bb.0: # %entry
+; CHECK-NEXT:    pushq %rbx
+; CHECK-NEXT:    .cfi_def_cfa_offset 16
+; CHECK-NEXT:    .cfi_offset %rbx, -16
+; CHECK-NEXT:    movslq {{.*}}(%rip), %rax
+; CHECK-NEXT:    cmpq %rdi, %rax
+; CHECK-NEXT:    je .LBB0_2
+; CHECK-NEXT:  # %bb.1: # %if.end
+; CHECK-NEXT:    popq %rbx
+; CHECK-NEXT:    .cfi_def_cfa_offset 8
+; CHECK-NEXT:    retq
+; CHECK-NEXT:  .LBB0_2: # %if.then
+; CHECK-NEXT:    .cfi_def_cfa_offset 16
+; CHECK-NEXT:    movq %rdi, %rbx
+; CHECK-NEXT:    callq callVoid
+; CHECK-NEXT:    movq %rbx, %rdi
+; CHECK-NEXT:    popq %rbx
+; CHECK-NEXT:    .cfi_def_cfa_offset 8
+; CHECK-NEXT:    jmp callNonVoid # TAILCALL
+;
+; CHECK-32BIT-LABEL: test1:
+; CHECK-32BIT:       # %bb.0: # %entry
+; CHECK-32BIT-NEXT:    subl $12, %esp
+; CHECK-32BIT-NEXT:    .cfi_def_cfa_offset 16
+; CHECK-32BIT-NEXT:    movl {{[0-9]+}}(%esp), %eax
+; CHECK-32BIT-NEXT:    cmpl %eax, a
+; CHECK-32BIT-NEXT:    je .LBB0_2
+; CHECK-32BIT-NEXT:  # %bb.1: # %if.end
+; CHECK-32BIT-NEXT:    addl $12, %esp
+; CHECK-32BIT-NEXT:    .cfi_def_cfa_offset 4
+; CHECK-32BIT-NEXT:    retl
+; CHECK-32BIT-NEXT:  .LBB0_2: # %if.then
+; CHECK-32BIT-NEXT:    .cfi_def_cfa_offset 16
+; CHECK-32BIT-NEXT:    calll callVoid
+; CHECK-32BIT-NEXT:    addl $12, %esp
+; CHECK-32BIT-NEXT:    .cfi_def_cfa_offset 4
+; CHECK-32BIT-NEXT:    jmp callNonVoid # TAILCALL
+entry:
+  %0 = load i32, i32* @a, align 4, !tbaa !2
+  %conv = sext i32 %0 to i64
+  %1 = inttoptr i64 %conv to i32*
+  %cmp = icmp eq i32* %1, %b
+  br i1 %cmp, label %if.then, label %if.end
+
+if.then:                                          ; preds = %entry
+  %call = tail call signext i32 bitcast (i32 (...)* @callVoid to i32 ()*)()
+  %call2 = tail call signext i32 @callNonVoid(i32* %b)
+  br label %if.end
+
+if.end:                                           ; preds = %if.then, %entry
+  %retval.0 = phi i32 [ %call2, %if.then ], [ undef, %entry ]
+  ret i32 %retval.0
+}
+
+declare signext i32 @callVoid(...) local_unnamed_addr
+
+declare signext i32 @callNonVoid(i32*) local_unnamed_addr
+
+define dso_local signext i32 @test2(i32* %p1) local_unnamed_addr  {
+; CHECK-LABEL: test2:
+; CHECK:       # %bb.0: # %entry
+; CHECK-NEXT:    pushq %rbx
+; CHECK-NEXT:    .cfi_def_cfa_offset 16
+; CHECK-NEXT:    .cfi_offset %rbx, -16
+; CHECK-NEXT:    testq %rdi, %rdi
+; CHECK-NEXT:    je .LBB1_2
+; CHECK-NEXT:  # %bb.1: # %if.end
+; CHECK-NEXT:    movq %rdi, %rbx
+; CHECK-NEXT:    movslq {{.*}}(%rip), %rax
+; CHECK-NEXT:    cmpq %rdi, %rax
+; CHECK-NEXT:    je .LBB1_3
+; CHECK-NEXT:  .LBB1_2: # %return
+; CHECK-NEXT:    xorl %eax, %eax
+; CHECK-NEXT:    popq %rbx
+; CHECK-NEXT:    .cfi_def_cfa_offset 8
+; CHECK-NEXT:    retq
+; CHECK-NEXT:  .LBB1_3: # %if.then2
+; CHECK-NEXT:    .cfi_def_cfa_offset 16
+; CHECK-NEXT:    callq callVoid
+; CHECK-NEXT:    movq %rbx, %rdi
+; CHECK-NEXT:    popq %rbx
+; CHECK-NEXT:    .cfi_def_cfa_offset 8
+; CHECK-NEXT:    jmp callNonVoid # TAILCALL
+;
+; CHECK-32BIT-LABEL: test2:
+; CHECK-32BIT:       # %bb.0: # %entry
+; CHECK-32BIT-NEXT:    subl $12, %esp
+; CHECK-32BIT-NEXT:    .cfi_def_cfa_offset 16
+; CHECK-32BIT-NEXT:    movl {{[0-9]+}}(%esp), %eax
+; CHECK-32BIT-NEXT:    testl %eax, %eax
+; CHECK-32BIT-NEXT:    je .LBB1_2
+; CHECK-32BIT-NEXT:  # %bb.1: # %if.end
+; CHECK-32BIT-NEXT:    cmpl %eax, a
+; CHECK-32BIT-NEXT:    je .LBB1_3
+; CHECK-32BIT-NEXT:  .LBB1_2: # %return
+; CHECK-32BIT-NEXT:    xorl %eax, %eax
+; CHECK-32BIT-NEXT:    addl $12, %esp
+; CHECK-32BIT-NEXT:    .cfi_def_cfa_offset 4
+; CHECK-32BIT-NEXT:    retl
+; CHECK-32BIT-NEXT:  .LBB1_3: # %if.then2
+; CHECK-32BIT-NEXT:    .cfi_def_cfa_offset 16
+; CHECK-32BIT-NEXT:    calll callVoid
+; CHECK-32BIT-NEXT:    addl $12, %esp
+; CHECK-32BIT-NEXT:    .cfi_def_cfa_offset 4
+; CHECK-32BIT-NEXT:    jmp callNonVoid # TAILCALL
+entry:
+  %tobool = icmp eq i32* %p1, null
+  br i1 %tobool, label %return, label %if.end
+
+if.end:                                           ; preds = %entry
+  %0 = load i32, i32* @a, align 4, !tbaa !2
+  %conv = sext i32 %0 to i64
+  %1 = inttoptr i64 %conv to i32*
+  %cmp = icmp eq i32* %1, %p1
+  br i1 %cmp, label %if.then2, label %return
+
+if.then2:                                         ; preds = %if.end
+  %call = tail call signext i32 bitcast (i32 (...)* @callVoid to i32 ()*)()
+  %call3 = tail call signext i32 @callNonVoid(i32* nonnull %p1)
+  br label %return
+
+return:                                           ; preds = %if.end, %entry, %if.then2
+  %retval.0 = phi i32 [ %call3, %if.then2 ], [ 0, %entry ], [ 0, %if.end ]
+  ret i32 %retval.0
+}
+
+
+define dso_local i8* @test3(i8** nocapture %p1, i8 zeroext %p2) local_unnamed_addr  {
+; CHECK-LABEL: test3:
+; CHECK:       # %bb.0: # %entry
+; CHECK-NEXT:    pushq %r14
+; CHECK-NEXT:    .cfi_def_cfa_offset 16
+; CHECK-NEXT:    pushq %rbx
+; CHECK-NEXT:    .cfi_def_cfa_offset 24
+; CHECK-NEXT:    pushq %rax
+; CHECK-NEXT:    .cfi_def_cfa_offset 32
+; CHECK-NEXT:    .cfi_offset %rbx, -24
+; CHECK-NEXT:    .cfi_offset %r14, -16
+; CHECK-NEXT:    movq (%rdi), %rbx
+; CHECK-NEXT:    testq %rbx, %rbx
+; CHECK-NEXT:    je .LBB2_2
+; CHECK-NEXT:  # %bb.1: # %land.rhs
+; CHECK-NEXT:    movq %rdi, %r14
+; CHECK-NEXT:    movzbl %sil, %esi
+; CHECK-NEXT:    movq %rbx, %rdi
+; CHECK-NEXT:    callq bar
+; CHECK-NEXT:    movq %rax, (%r14)
+; CHECK-NEXT:  .LBB2_2: # %land.end
+; CHECK-NEXT:    movq %rbx, %rax
+; CHECK-NEXT:    addq $8, %rsp
+; CHECK-NEXT:    .cfi_def_cfa_offset 24
+; CHECK-NEXT:    popq %rbx
+; CHECK-NEXT:    .cfi_def_cfa_offset 16
+; CHECK-NEXT:    popq %r14
+; CHECK-NEXT:    .cfi_def_cfa_offset 8
+; CHECK-NEXT:    retq
+;
+; CHECK-32BIT-LABEL: test3:
+; CHECK-32BIT:       # %bb.0: # %entry
+; CHECK-32BIT-NEXT:    pushl %edi
+; CHECK-32BIT-NEXT:    .cfi_def_cfa_offset 8
+; CHECK-32BIT-NEXT:    pushl %esi
+; CHECK-32BIT-NEXT:    .cfi_def_cfa_offset 12
+; CHECK-32BIT-NEXT:    pushl %eax
+; CHECK-32BIT-NEXT:    .cfi_def_cfa_offset 16
+; CHECK-32BIT-NEXT:    .cfi_offset %esi, -12
+; CHECK-32BIT-NEXT:    .cfi_offset %edi, -8
+; CHECK-32BIT-NEXT:    movl {{[0-9]+}}(%esp), %edi
+; CHECK-32BIT-NEXT:    movl (%edi), %esi
+; CHECK-32BIT-NEXT:    testl %esi, %esi
+; CHECK-32BIT-NEXT:    je .LBB2_2
+; CHECK-32BIT-NEXT:  # %bb.1: # %land.rhs
+; CHECK-32BIT-NEXT:    subl $8, %esp
+; CHECK-32BIT-NEXT:    .cfi_adjust_cfa_offset 8
+; CHECK-32BIT-NEXT:    movzbl {{[0-9]+}}(%esp), %eax
+; CHECK-32BIT-NEXT:    pushl %eax
+; CHECK-32BIT-NEXT:    .cfi_adjust_cfa_offset 4
+; CHECK-32BIT-NEXT:    pushl %esi
+; CHECK-32BIT-NEXT:    .cfi_adjust_cfa_offset 4
+; CHECK-32BIT-NEXT:    calll bar
+; CHECK-32BIT-NEXT:    addl $16, %esp
+; CHECK-32BIT-NEXT:    .cfi_adjust_cfa_offset -16
+; CHECK-32BIT-NEXT:    movl %eax, (%edi)
+; CHECK-32BIT-NEXT:  .LBB2_2: # %land.end
+; CHECK-32BIT-NEXT:    movl %esi, %eax
+; CHECK-32BIT-NEXT:    addl $4, %esp
+; CHECK-32BIT-NEXT:    .cfi_def_cfa_offset 12
+; CHECK-32BIT-NEXT:    popl %esi
+; CHECK-32BIT-NEXT:    .cfi_def_cfa_offset 8
+; CHECK-32BIT-NEXT:    popl %edi
+; CHECK-32BIT-NEXT:    .cfi_def_cfa_offset 4
+; CHECK-32BIT-NEXT:    retl
+entry:
+  %0 = load i8*, i8** %p1, align 8, !tbaa !6
+  %tobool = icmp eq i8* %0, null
+  br i1 %tobool, label %land.end, label %land.rhs
+
+land.rhs:                                         ; preds = %entry
+  %call = tail call i8* @bar(i8* nonnull %0, i8 zeroext %p2)
+  store i8* %call, i8** %p1, align 8, !tbaa !6
+  br label %land.end
+
+land.end:                                         ; preds = %entry, %land.rhs
+  ret i8* %0
+}
+
+declare i8* @bar(i8*, i8 zeroext) local_unnamed_addr
+
+
+!llvm.module.flags = !{!0}
+!llvm.ident = !{!1}
+
+!0 = !{i32 1, !"wchar_size", i32 4}
+!1 = !{!"clang version 10.0.0 (trunk 367381) (llvm/trunk 367388)"}
+!2 = !{!3, !3, i64 0}
+!3 = !{!"int", !4, i64 0}
+!4 = !{!"omnipotent char", !5, i64 0}
+!5 = !{!"Simple C/C++ TBAA"}
+!6 = !{!7, !7, i64 0}
+!7 = !{!"any pointer", !4, i64 0}