csr-split.ll
4.32 KB
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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -verify-machineinstrs -mtriple=arm-unknown-linux < %s | FileCheck %s
; 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: push {r4, lr}
; CHECK-NEXT: mov r4, r0
; CHECK-NEXT: ldr r0, .LCPI0_0
; CHECK-NEXT: ldr r0, [r0]
; CHECK-NEXT: cmp r0, r4
; CHECK-NEXT: popne {r4, lr}
; CHECK-NEXT: movne pc, lr
; CHECK-NEXT: .LBB0_1: @ %if.then
; CHECK-NEXT: bl callVoid
; CHECK-NEXT: mov r0, r4
; CHECK-NEXT: pop {r4, lr}
; CHECK-NEXT: b callNonVoid
; CHECK-NEXT: .p2align 2
; CHECK-NEXT: @ %bb.2:
; CHECK-NEXT: .LCPI0_0:
; CHECK-NEXT: .long a
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: push {r4, lr}
; CHECK-NEXT: cmp r0, #0
; CHECK-NEXT: beq .LBB1_2
; CHECK-NEXT: @ %bb.1: @ %if.end
; CHECK-NEXT: mov r4, r0
; CHECK-NEXT: ldr r0, .LCPI1_0
; CHECK-NEXT: ldr r0, [r0]
; CHECK-NEXT: cmp r0, r4
; CHECK-NEXT: beq .LBB1_3
; CHECK-NEXT: .LBB1_2: @ %return
; CHECK-NEXT: mov r0, #0
; CHECK-NEXT: pop {r4, lr}
; CHECK-NEXT: mov pc, lr
; CHECK-NEXT: .LBB1_3: @ %if.then2
; CHECK-NEXT: bl callVoid
; CHECK-NEXT: mov r0, r4
; CHECK-NEXT: pop {r4, lr}
; CHECK-NEXT: b callNonVoid
; CHECK-NEXT: .p2align 2
; CHECK-NEXT: @ %bb.4:
; CHECK-NEXT: .LCPI1_0:
; CHECK-NEXT: .long a
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: push {r4, r5, r11, lr}
; CHECK-NEXT: ldr r4, [r0]
; CHECK-NEXT: cmp r4, #0
; CHECK-NEXT: beq .LBB2_2
; CHECK-NEXT: @ %bb.1: @ %land.rhs
; CHECK-NEXT: mov r5, r0
; CHECK-NEXT: mov r0, r4
; CHECK-NEXT: bl bar
; CHECK-NEXT: str r0, [r5]
; CHECK-NEXT: .LBB2_2: @ %land.end
; CHECK-NEXT: mov r0, r4
; CHECK-NEXT: pop {r4, r5, r11, lr}
; CHECK-NEXT: mov pc, lr
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}