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llvm-mirror/test/CodeGen/AArch64/analyze-branch.ll
Tim Northover e2b0519ed8 Add AArch64 as an experimental target. 
This patch adds support for AArch64 (ARM's 64-bit architecture) to
LLVM in the "experimental" category. Currently, it won't be built
unless requested explicitly.

This initial commit should have support for:
    + Assembly of all scalar (i.e. non-NEON, non-Crypto) instructions
      (except the late addition CRC instructions).
    + CodeGen features required for C++03 and C99.
    + Compilation for the "small" memory model: code+static data <
      4GB.
    + Absolute and position-independent code.
    + GNU-style (i.e. "__thread") TLS.
    + Debugging information.

The principal omission, currently, is performance tuning.

This patch excludes the NEON support also reviewed due to an outbreak of
batshit insanity in our legal department. That will be committed soon bringing
the changes to precisely what has been approved.

Further reviews would be gratefully received.

llvm-svn: 174054
2013-01-31 12:12:40 +00:00

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; RUN: llc -march=aarch64 < %s | FileCheck %s
; This test checks that LLVM can do basic stripping and reapplying of branches
; to basic blocks.
declare void @test_true()
declare void @test_false()
; !0 corresponds to a branch being taken, !1 to not being takne.
!0 = metadata !{metadata !"branch_weights", i32 64, i32 4}
!1 = metadata !{metadata !"branch_weights", i32 4, i32 64}
define void @test_Bcc_fallthrough_taken(i32 %in) nounwind {
; CHECK: test_Bcc_fallthrough_taken:
%tst = icmp eq i32 %in, 42
br i1 %tst, label %true, label %false, !prof !0
; CHECK: cmp {{w[0-9]+}}, #42
; CHECK: b.ne [[FALSE:.LBB[0-9]+_[0-9]+]]
; CHECK-NEXT: // BB#
; CHECK-NEXT: bl test_true
; CHECK: [[FALSE]]:
; CHECK: bl test_false
true:
call void @test_true()
ret void
false:
call void @test_false()
ret void
}
define void @test_Bcc_fallthrough_nottaken(i32 %in) nounwind {
; CHECK: test_Bcc_fallthrough_nottaken:
%tst = icmp eq i32 %in, 42
br i1 %tst, label %true, label %false, !prof !1
; CHECK: cmp {{w[0-9]+}}, #42
; CHECK: b.eq [[TRUE:.LBB[0-9]+_[0-9]+]]
; CHECK-NEXT: // BB#
; CHECK-NEXT: bl test_false
; CHECK: [[TRUE]]:
; CHECK: bl test_true
true:
call void @test_true()
ret void
false:
call void @test_false()
ret void
}
define void @test_CBZ_fallthrough_taken(i32 %in) nounwind {
; CHECK: test_CBZ_fallthrough_taken:
%tst = icmp eq i32 %in, 0
br i1 %tst, label %true, label %false, !prof !0
; CHECK: cbnz {{w[0-9]+}}, [[FALSE:.LBB[0-9]+_[0-9]+]]
; CHECK-NEXT: // BB#
; CHECK-NEXT: bl test_true
; CHECK: [[FALSE]]:
; CHECK: bl test_false
true:
call void @test_true()
ret void
false:
call void @test_false()
ret void
}
define void @test_CBZ_fallthrough_nottaken(i64 %in) nounwind {
; CHECK: test_CBZ_fallthrough_nottaken:
%tst = icmp eq i64 %in, 0
br i1 %tst, label %true, label %false, !prof !1
; CHECK: cbz {{x[0-9]+}}, [[TRUE:.LBB[0-9]+_[0-9]+]]
; CHECK-NEXT: // BB#
; CHECK-NEXT: bl test_false
; CHECK: [[TRUE]]:
; CHECK: bl test_true
true:
call void @test_true()
ret void
false:
call void @test_false()
ret void
}
define void @test_CBNZ_fallthrough_taken(i32 %in) nounwind {
; CHECK: test_CBNZ_fallthrough_taken:
%tst = icmp ne i32 %in, 0
br i1 %tst, label %true, label %false, !prof !0
; CHECK: cbz {{w[0-9]+}}, [[FALSE:.LBB[0-9]+_[0-9]+]]
; CHECK-NEXT: // BB#
; CHECK-NEXT: bl test_true
; CHECK: [[FALSE]]:
; CHECK: bl test_false
true:
call void @test_true()
ret void
false:
call void @test_false()
ret void
}
define void @test_CBNZ_fallthrough_nottaken(i64 %in) nounwind {
; CHECK: test_CBNZ_fallthrough_nottaken:
%tst = icmp ne i64 %in, 0
br i1 %tst, label %true, label %false, !prof !1
; CHECK: cbnz {{x[0-9]+}}, [[TRUE:.LBB[0-9]+_[0-9]+]]
; CHECK-NEXT: // BB#
; CHECK-NEXT: bl test_false
; CHECK: [[TRUE]]:
; CHECK: bl test_true
true:
call void @test_true()
ret void
false:
call void @test_false()
ret void
}
define void @test_TBZ_fallthrough_taken(i32 %in) nounwind {
; CHECK: test_TBZ_fallthrough_taken:
%bit = and i32 %in, 32768
%tst = icmp eq i32 %bit, 0
br i1 %tst, label %true, label %false, !prof !0
; CHECK: tbnz {{w[0-9]+}}, #15, [[FALSE:.LBB[0-9]+_[0-9]+]]
; CHECK-NEXT: // BB#
; CHECK-NEXT: bl test_true
; CHECK: [[FALSE]]:
; CHECK: bl test_false
true:
call void @test_true()
ret void
false:
call void @test_false()
ret void
}
define void @test_TBZ_fallthrough_nottaken(i64 %in) nounwind {
; CHECK: test_TBZ_fallthrough_nottaken:
%bit = and i64 %in, 32768
%tst = icmp eq i64 %bit, 0
br i1 %tst, label %true, label %false, !prof !1
; CHECK: tbz {{x[0-9]+}}, #15, [[TRUE:.LBB[0-9]+_[0-9]+]]
; CHECK-NEXT: // BB#
; CHECK-NEXT: bl test_false
; CHECK: [[TRUE]]:
; CHECK: bl test_true
true:
call void @test_true()
ret void
false:
call void @test_false()
ret void
}
define void @test_TBNZ_fallthrough_taken(i32 %in) nounwind {
; CHECK: test_TBNZ_fallthrough_taken:
%bit = and i32 %in, 32768
%tst = icmp ne i32 %bit, 0
br i1 %tst, label %true, label %false, !prof !0
; CHECK: tbz {{w[0-9]+}}, #15, [[FALSE:.LBB[0-9]+_[0-9]+]]
; CHECK-NEXT: // BB#
; CHECK-NEXT: bl test_true
; CHECK: [[FALSE]]:
; CHECK: bl test_false
true:
call void @test_true()
ret void
false:
call void @test_false()
ret void
}
define void @test_TBNZ_fallthrough_nottaken(i64 %in) nounwind {
; CHECK: test_TBNZ_fallthrough_nottaken:
%bit = and i64 %in, 32768
%tst = icmp ne i64 %bit, 0
br i1 %tst, label %true, label %false, !prof !1
; CHECK: tbnz {{x[0-9]+}}, #15, [[TRUE:.LBB[0-9]+_[0-9]+]]
; CHECK-NEXT: // BB#
; CHECK-NEXT: bl test_false
; CHECK: [[TRUE]]:
; CHECK: bl test_true
true:
call void @test_true()
ret void
false:
call void @test_false()
ret void
}
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