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llvm-mirror/test/CodeGen/SystemZ/branch-05.ll
Richard Sandiford 76d1801e90 [SystemZ] Add unsigned compare-and-branch instructions
For some reason I never got around to adding these at the same time as
the signed versions.  No idea why.

I'm not sure whether this SystemZII::BranchC* stuff is useful, or whether
it should just be replaced with an "is normal" flag.  I'll leave that
for later though.

There are some boundary conditions that can be tweaked, such as preferring
unsigned comparisons for equality with [128, 256), and "<= 255" over "< 256",
but again I'll leave those for a separate patch.

llvm-svn: 190930
2013-09-18 09:56:40 +00:00

58 lines
1.1 KiB
LLVM

; Test indirect jumps.
;
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
define i32 @f1(i32 %x, i32 %y, i32 %op) {
; CHECK-LABEL: f1:
; CHECK: ahi %r4, -1
; CHECK: clijh %r4, 5,
; CHECK: llgfr [[OP64:%r[0-5]]], %r4
; CHECK: sllg [[INDEX:%r[1-5]]], [[OP64]], 3
; CHECK: larl [[BASE:%r[1-5]]]
; CHECK: lg [[TARGET:%r[1-5]]], 0([[BASE]],[[INDEX]])
; CHECK: br [[TARGET]]
entry:
switch i32 %op, label %exit [
i32 1, label %b.add
i32 2, label %b.sub
i32 3, label %b.and
i32 4, label %b.or
i32 5, label %b.xor
i32 6, label %b.mul
]
b.add:
%add = add i32 %x, %y
br label %exit
b.sub:
%sub = sub i32 %x, %y
br label %exit
b.and:
%and = and i32 %x, %y
br label %exit
b.or:
%or = or i32 %x, %y
br label %exit
b.xor:
%xor = xor i32 %x, %y
br label %exit
b.mul:
%mul = mul i32 %x, %y
br label %exit
exit:
%res = phi i32 [ %x, %entry ],
[ %add, %b.add ],
[ %sub, %b.sub ],
[ %and, %b.and ],
[ %or, %b.or ],
[ %xor, %b.xor ],
[ %mul, %b.mul ]
ret i32 %res
}