2013-05-06 16:17:29 +00:00
|
|
|
; Test 32-bit rotates left.
|
|
|
|
;
|
|
|
|
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
|
|
|
|
|
|
|
|
; Check the low end of the RLL range.
|
|
|
|
define i32 @f1(i32 %a) {
|
2013-07-14 06:24:09 +00:00
|
|
|
; CHECK-LABEL: f1:
|
2013-05-06 16:17:29 +00:00
|
|
|
; CHECK: rll %r2, %r2, 1
|
|
|
|
; CHECK: br %r14
|
|
|
|
%parta = shl i32 %a, 1
|
|
|
|
%partb = lshr i32 %a, 31
|
|
|
|
%or = or i32 %parta, %partb
|
|
|
|
ret i32 %or
|
|
|
|
}
|
|
|
|
|
|
|
|
; Check the high end of the defined RLL range.
|
|
|
|
define i32 @f2(i32 %a) {
|
2013-07-14 06:24:09 +00:00
|
|
|
; CHECK-LABEL: f2:
|
2013-05-06 16:17:29 +00:00
|
|
|
; CHECK: rll %r2, %r2, 31
|
|
|
|
; CHECK: br %r14
|
|
|
|
%parta = shl i32 %a, 31
|
|
|
|
%partb = lshr i32 %a, 1
|
|
|
|
%or = or i32 %parta, %partb
|
|
|
|
ret i32 %or
|
|
|
|
}
|
|
|
|
|
|
|
|
; We don't generate shifts by out-of-range values.
|
|
|
|
define i32 @f3(i32 %a) {
|
2013-07-14 06:24:09 +00:00
|
|
|
; CHECK-LABEL: f3:
|
2013-05-06 16:17:29 +00:00
|
|
|
; CHECK-NOT: rll
|
|
|
|
; CHECK: br %r14
|
|
|
|
%parta = shl i32 %a, 32
|
|
|
|
%partb = lshr i32 %a, 0
|
|
|
|
%or = or i32 %parta, %partb
|
|
|
|
ret i32 %or
|
|
|
|
}
|
|
|
|
|
|
|
|
; Check variable shifts.
|
|
|
|
define i32 @f4(i32 %a, i32 %amt) {
|
2013-07-14 06:24:09 +00:00
|
|
|
; CHECK-LABEL: f4:
|
2013-05-06 16:17:29 +00:00
|
|
|
; CHECK: rll %r2, %r2, 0(%r3)
|
|
|
|
; CHECK: br %r14
|
|
|
|
%amtb = sub i32 32, %amt
|
|
|
|
%parta = shl i32 %a, %amt
|
|
|
|
%partb = lshr i32 %a, %amtb
|
|
|
|
%or = or i32 %parta, %partb
|
|
|
|
ret i32 %or
|
|
|
|
}
|
|
|
|
|
|
|
|
; Check shift amounts that have a constant term.
|
|
|
|
define i32 @f5(i32 %a, i32 %amt) {
|
2013-07-14 06:24:09 +00:00
|
|
|
; CHECK-LABEL: f5:
|
2013-05-06 16:17:29 +00:00
|
|
|
; CHECK: rll %r2, %r2, 10(%r3)
|
|
|
|
; CHECK: br %r14
|
|
|
|
%add = add i32 %amt, 10
|
|
|
|
%sub = sub i32 32, %add
|
|
|
|
%parta = shl i32 %a, %add
|
|
|
|
%partb = lshr i32 %a, %sub
|
|
|
|
%or = or i32 %parta, %partb
|
|
|
|
ret i32 %or
|
|
|
|
}
|
|
|
|
|
|
|
|
; ...and again with a truncated 64-bit shift amount.
|
|
|
|
define i32 @f6(i32 %a, i64 %amt) {
|
2013-07-14 06:24:09 +00:00
|
|
|
; CHECK-LABEL: f6:
|
2013-05-06 16:17:29 +00:00
|
|
|
; CHECK: rll %r2, %r2, 10(%r3)
|
|
|
|
; CHECK: br %r14
|
|
|
|
%add = add i64 %amt, 10
|
|
|
|
%addtrunc = trunc i64 %add to i32
|
|
|
|
%sub = sub i32 32, %addtrunc
|
|
|
|
%parta = shl i32 %a, %addtrunc
|
|
|
|
%partb = lshr i32 %a, %sub
|
|
|
|
%or = or i32 %parta, %partb
|
|
|
|
ret i32 %or
|
|
|
|
}
|
|
|
|
|
|
|
|
; ...and again with a different truncation representation.
|
|
|
|
define i32 @f7(i32 %a, i64 %amt) {
|
2013-07-14 06:24:09 +00:00
|
|
|
; CHECK-LABEL: f7:
|
2013-05-06 16:17:29 +00:00
|
|
|
; CHECK: rll %r2, %r2, 10(%r3)
|
|
|
|
; CHECK: br %r14
|
|
|
|
%add = add i64 %amt, 10
|
|
|
|
%sub = sub i64 32, %add
|
|
|
|
%addtrunc = trunc i64 %add to i32
|
|
|
|
%subtrunc = trunc i64 %sub to i32
|
|
|
|
%parta = shl i32 %a, %addtrunc
|
|
|
|
%partb = lshr i32 %a, %subtrunc
|
|
|
|
%or = or i32 %parta, %partb
|
|
|
|
ret i32 %or
|
|
|
|
}
|
|
|
|
|
|
|
|
; Check shift amounts that have the largest in-range constant term. We could
|
|
|
|
; mask the amount instead.
|
|
|
|
define i32 @f8(i32 %a, i32 %amt) {
|
2013-07-14 06:24:09 +00:00
|
|
|
; CHECK-LABEL: f8:
|
2013-05-06 16:17:29 +00:00
|
|
|
; CHECK: rll %r2, %r2, 524287(%r3)
|
|
|
|
; CHECK: br %r14
|
|
|
|
%add = add i32 %amt, 524287
|
|
|
|
%sub = sub i32 32, %add
|
|
|
|
%parta = shl i32 %a, %add
|
|
|
|
%partb = lshr i32 %a, %sub
|
|
|
|
%or = or i32 %parta, %partb
|
|
|
|
ret i32 %or
|
|
|
|
}
|
|
|
|
|
|
|
|
; Check the next value up, which without masking must use a separate
|
|
|
|
; addition.
|
|
|
|
define i32 @f9(i32 %a, i32 %amt) {
|
2013-07-14 06:24:09 +00:00
|
|
|
; CHECK-LABEL: f9:
|
2013-05-06 16:17:29 +00:00
|
|
|
; CHECK: afi %r3, 524288
|
|
|
|
; CHECK: rll %r2, %r2, 0(%r3)
|
|
|
|
; CHECK: br %r14
|
|
|
|
%add = add i32 %amt, 524288
|
|
|
|
%sub = sub i32 32, %add
|
|
|
|
%parta = shl i32 %a, %add
|
|
|
|
%partb = lshr i32 %a, %sub
|
|
|
|
%or = or i32 %parta, %partb
|
|
|
|
ret i32 %or
|
|
|
|
}
|
|
|
|
|
|
|
|
; Check cases where 1 is subtracted from the shift amount.
|
|
|
|
define i32 @f10(i32 %a, i32 %amt) {
|
2013-07-14 06:24:09 +00:00
|
|
|
; CHECK-LABEL: f10:
|
2013-05-06 16:17:29 +00:00
|
|
|
; CHECK: rll %r2, %r2, -1(%r3)
|
|
|
|
; CHECK: br %r14
|
|
|
|
%suba = sub i32 %amt, 1
|
|
|
|
%subb = sub i32 32, %suba
|
|
|
|
%parta = shl i32 %a, %suba
|
|
|
|
%partb = lshr i32 %a, %subb
|
|
|
|
%or = or i32 %parta, %partb
|
|
|
|
ret i32 %or
|
|
|
|
}
|
|
|
|
|
|
|
|
; Check the lowest value that can be subtracted from the shift amount.
|
|
|
|
; Again, we could mask the shift amount instead.
|
|
|
|
define i32 @f11(i32 %a, i32 %amt) {
|
2013-07-14 06:24:09 +00:00
|
|
|
; CHECK-LABEL: f11:
|
2013-05-06 16:17:29 +00:00
|
|
|
; CHECK: rll %r2, %r2, -524288(%r3)
|
|
|
|
; CHECK: br %r14
|
|
|
|
%suba = sub i32 %amt, 524288
|
|
|
|
%subb = sub i32 32, %suba
|
|
|
|
%parta = shl i32 %a, %suba
|
|
|
|
%partb = lshr i32 %a, %subb
|
|
|
|
%or = or i32 %parta, %partb
|
|
|
|
ret i32 %or
|
|
|
|
}
|
|
|
|
|
|
|
|
; Check the next value down, which without masking must use a separate
|
|
|
|
; addition.
|
|
|
|
define i32 @f12(i32 %a, i32 %amt) {
|
2013-07-14 06:24:09 +00:00
|
|
|
; CHECK-LABEL: f12:
|
2013-05-06 16:17:29 +00:00
|
|
|
; CHECK: afi %r3, -524289
|
|
|
|
; CHECK: rll %r2, %r2, 0(%r3)
|
|
|
|
; CHECK: br %r14
|
|
|
|
%suba = sub i32 %amt, 524289
|
|
|
|
%subb = sub i32 32, %suba
|
|
|
|
%parta = shl i32 %a, %suba
|
|
|
|
%partb = lshr i32 %a, %subb
|
|
|
|
%or = or i32 %parta, %partb
|
|
|
|
ret i32 %or
|
|
|
|
}
|
|
|
|
|
|
|
|
; Check that we don't try to generate "indexed" shifts.
|
|
|
|
define i32 @f13(i32 %a, i32 %b, i32 %c) {
|
2013-07-14 06:24:09 +00:00
|
|
|
; CHECK-LABEL: f13:
|
2013-05-06 16:17:29 +00:00
|
|
|
; CHECK: ar {{%r3, %r4|%r4, %r3}}
|
|
|
|
; CHECK: rll %r2, %r2, 0({{%r[34]}})
|
|
|
|
; CHECK: br %r14
|
|
|
|
%add = add i32 %b, %c
|
|
|
|
%sub = sub i32 32, %add
|
|
|
|
%parta = shl i32 %a, %add
|
|
|
|
%partb = lshr i32 %a, %sub
|
|
|
|
%or = or i32 %parta, %partb
|
|
|
|
ret i32 %or
|
|
|
|
}
|
|
|
|
|
|
|
|
; Check that the shift amount uses an address register. It cannot be in %r0.
|
|
|
|
define i32 @f14(i32 %a, i32 *%ptr) {
|
2013-07-14 06:24:09 +00:00
|
|
|
; CHECK-LABEL: f14:
|
2013-05-06 16:17:29 +00:00
|
|
|
; CHECK: l %r1, 0(%r3)
|
|
|
|
; CHECK: rll %r2, %r2, 0(%r1)
|
|
|
|
; CHECK: br %r14
|
|
|
|
%amt = load i32 *%ptr
|
|
|
|
%amtb = sub i32 32, %amt
|
|
|
|
%parta = shl i32 %a, %amt
|
|
|
|
%partb = lshr i32 %a, %amtb
|
|
|
|
%or = or i32 %parta, %partb
|
|
|
|
ret i32 %or
|
|
|
|
}
|
Match the InstCombine form of rotates by X+C
InstCombine converts (sub 32, (add X, C)) into (sub 32-C, X),
so a rotate left of a 32-bit Y by X+C could appear as either:
(or (shl Y, (add X, C)), (shr Y, (sub 32, (add X, C))))
without InstCombine or:
(or (shl Y, (add X, C)), (shr Y, (sub 32-C, X)))
with it.
We already matched the first form. This patch handles the second too.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@198860 91177308-0d34-0410-b5e6-96231b3b80d8
2014-01-09 10:49:40 +00:00
|
|
|
|
|
|
|
; Check another form of f5, which is the one produced by running f5 through
|
|
|
|
; instcombine.
|
|
|
|
define i32 @f15(i32 %a, i32 %amt) {
|
|
|
|
; CHECK-LABEL: f15:
|
|
|
|
; CHECK: rll %r2, %r2, 10(%r3)
|
|
|
|
; CHECK: br %r14
|
|
|
|
%add = add i32 %amt, 10
|
|
|
|
%sub = sub i32 22, %amt
|
|
|
|
%parta = shl i32 %a, %add
|
|
|
|
%partb = lshr i32 %a, %sub
|
|
|
|
%or = or i32 %parta, %partb
|
|
|
|
ret i32 %or
|
|
|
|
}
|
|
|
|
|
|
|
|
; Likewise for f7.
|
|
|
|
define i32 @f16(i32 %a, i64 %amt) {
|
|
|
|
; CHECK-LABEL: f16:
|
|
|
|
; CHECK: rll %r2, %r2, 10(%r3)
|
|
|
|
; CHECK: br %r14
|
|
|
|
%add = add i64 %amt, 10
|
|
|
|
%sub = sub i64 22, %amt
|
|
|
|
%addtrunc = trunc i64 %add to i32
|
|
|
|
%subtrunc = trunc i64 %sub to i32
|
|
|
|
%parta = shl i32 %a, %addtrunc
|
|
|
|
%partb = lshr i32 %a, %subtrunc
|
|
|
|
%or = or i32 %parta, %partb
|
|
|
|
ret i32 %or
|
|
|
|
}
|
2014-01-09 10:56:42 +00:00
|
|
|
|
|
|
|
; Check cases where (-x & 31) is used instead of 32 - x.
|
|
|
|
define i32 @f17(i32 %x, i32 %y) {
|
|
|
|
; CHECK-LABEL: f17:
|
|
|
|
; CHECK: rll %r2, %r2, 0(%r3)
|
|
|
|
; CHECK: br %r14
|
|
|
|
entry:
|
|
|
|
%shl = shl i32 %x, %y
|
|
|
|
%sub = sub i32 0, %y
|
|
|
|
%and = and i32 %sub, 31
|
|
|
|
%shr = lshr i32 %x, %and
|
|
|
|
%or = or i32 %shr, %shl
|
|
|
|
ret i32 %or
|
|
|
|
}
|
|
|
|
|
|
|
|
; ...and again with ((32 - x) & 31).
|
|
|
|
define i32 @f18(i32 %x, i32 %y) {
|
|
|
|
; CHECK-LABEL: f18:
|
|
|
|
; CHECK: rll %r2, %r2, 0(%r3)
|
|
|
|
; CHECK: br %r14
|
|
|
|
entry:
|
|
|
|
%shl = shl i32 %x, %y
|
|
|
|
%sub = sub i32 32, %y
|
|
|
|
%and = and i32 %sub, 31
|
|
|
|
%shr = lshr i32 %x, %and
|
|
|
|
%or = or i32 %shr, %shl
|
|
|
|
ret i32 %or
|
|
|
|
}
|
|
|
|
|
|
|
|
; This is not a rotation.
|
|
|
|
define i32 @f19(i32 %x, i32 %y) {
|
|
|
|
; CHECK-LABEL: f19:
|
|
|
|
; CHECK-NOT: rll
|
|
|
|
; CHECK: br %r14
|
|
|
|
entry:
|
|
|
|
%shl = shl i32 %x, %y
|
|
|
|
%sub = sub i32 16, %y
|
|
|
|
%and = and i32 %sub, 31
|
|
|
|
%shr = lshr i32 %x, %and
|
|
|
|
%or = or i32 %shr, %shl
|
|
|
|
ret i32 %or
|
|
|
|
}
|
|
|
|
|
|
|
|
; Repeat f17 with an addition on the shift count.
|
|
|
|
define i32 @f20(i32 %x, i32 %y) {
|
|
|
|
; CHECK-LABEL: f20:
|
|
|
|
; CHECK: rll %r2, %r2, 199(%r3)
|
|
|
|
; CHECK: br %r14
|
|
|
|
entry:
|
|
|
|
%add = add i32 %y, 199
|
|
|
|
%shl = shl i32 %x, %add
|
|
|
|
%sub = sub i32 0, %add
|
|
|
|
%and = and i32 %sub, 31
|
|
|
|
%shr = lshr i32 %x, %and
|
|
|
|
%or = or i32 %shr, %shl
|
|
|
|
ret i32 %or
|
|
|
|
}
|
|
|
|
|
|
|
|
; ...and again with the InstCombine version.
|
|
|
|
define i32 @f21(i32 %x, i32 %y) {
|
|
|
|
; CHECK-LABEL: f21:
|
|
|
|
; CHECK: rll %r2, %r2, 199(%r3)
|
|
|
|
; CHECK: br %r14
|
|
|
|
entry:
|
|
|
|
%add = add i32 %y, 199
|
|
|
|
%shl = shl i32 %x, %add
|
|
|
|
%sub = sub i32 -199, %y
|
|
|
|
%and = and i32 %sub, 31
|
|
|
|
%shr = lshr i32 %x, %and
|
|
|
|
%or = or i32 %shr, %shl
|
|
|
|
ret i32 %or
|
|
|
|
}
|