llvm-mirror/test/CodeGen/AArch64/compare-branch.ll
Kyle Butt 6035a9f12a Revert "CodeGen: Allow small copyable blocks to "break" the CFG."
This reverts commit ada6595a526d71df04988eb0a4b4fe84df398ded.

This needs a simple probability check because there are some cases where it is
not profitable.

llvm-svn: 291695
2017-01-11 19:55:19 +00:00

42 lines
929 B
LLVM

; RUN: llc -verify-machineinstrs -o - %s -mtriple=aarch64-linux-gnu | FileCheck %s
@var32 = global i32 0
@var64 = global i64 0
define void @foo() {
; CHECK-LABEL: foo:
%val1 = load volatile i32, i32* @var32
%tst1 = icmp eq i32 %val1, 0
br i1 %tst1, label %end, label %test2, !prof !1
; CHECK: cbz {{w[0-9]+}}, .LBB
test2:
%val2 = load volatile i32, i32* @var32
%tst2 = icmp ne i32 %val2, 0
br i1 %tst2, label %end, label %test3, !prof !1
; CHECK: cbnz {{w[0-9]+}}, .LBB
test3:
%val3 = load volatile i64, i64* @var64
%tst3 = icmp eq i64 %val3, 0
br i1 %tst3, label %end, label %test4, !prof !1
; CHECK: cbz {{x[0-9]+}}, .LBB
test4:
%val4 = load volatile i64, i64* @var64
%tst4 = icmp ne i64 %val4, 0
br i1 %tst4, label %end, label %test5, !prof !1
; CHECK: cbnz {{x[0-9]+}}, .LBB
test5:
store volatile i64 %val4, i64* @var64
ret void
end:
ret void
}
!1 = !{!"branch_weights", i32 1, i32 1}