mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-22 18:54:02 +01:00
127 lines
3.0 KiB
LLVM
127 lines
3.0 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
|
|
; Test 32-bit arithmetic shifts right.
|
|
;
|
|
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
|
|
|
|
; Check the low end of the SRA range.
|
|
define i32 @f1(i32 %a) {
|
|
; CHECK-LABEL: f1:
|
|
; CHECK: # %bb.0:
|
|
; CHECK-NEXT: sra %r2, 1
|
|
; CHECK-NEXT: br %r14
|
|
%shift = ashr i32 %a, 1
|
|
ret i32 %shift
|
|
}
|
|
|
|
; Check the high end of the defined SRA range.
|
|
define i32 @f2(i32 %a) {
|
|
; CHECK-LABEL: f2:
|
|
; CHECK: # %bb.0:
|
|
; CHECK-NEXT: sra %r2, 31
|
|
; CHECK-NEXT: br %r14
|
|
%shift = ashr i32 %a, 31
|
|
ret i32 %shift
|
|
}
|
|
|
|
; We don't generate shifts by out-of-range values.
|
|
define i32 @f3(i32 %a) {
|
|
; CHECK-LABEL: f3:
|
|
; CHECK: # %bb.0:
|
|
; CHECK-NEXT: br %r14
|
|
%shift = ashr i32 %a, 32
|
|
ret i32 %shift
|
|
}
|
|
|
|
; Make sure that we don't generate negative shift amounts.
|
|
define i32 @f4(i32 %a, i32 %amt) {
|
|
; CHECK-LABEL: f4:
|
|
; CHECK: # %bb.0:
|
|
; CHECK-NEXT: ahi %r3, -1
|
|
; CHECK-NEXT: sra %r2, 0(%r3)
|
|
; CHECK-NEXT: br %r14
|
|
%sub = sub i32 %amt, 1
|
|
%shift = ashr i32 %a, %sub
|
|
ret i32 %shift
|
|
}
|
|
|
|
; Check variable shifts.
|
|
define i32 @f5(i32 %a, i32 %amt) {
|
|
; CHECK-LABEL: f5:
|
|
; CHECK: # %bb.0:
|
|
; CHECK-NEXT: sra %r2, 0(%r3)
|
|
; CHECK-NEXT: br %r14
|
|
%shift = ashr i32 %a, %amt
|
|
ret i32 %shift
|
|
}
|
|
|
|
; Check shift amounts that have a constant term.
|
|
define i32 @f6(i32 %a, i32 %amt) {
|
|
; CHECK-LABEL: f6:
|
|
; CHECK: # %bb.0:
|
|
; CHECK-NEXT: sra %r2, 10(%r3)
|
|
; CHECK-NEXT: br %r14
|
|
%add = add i32 %amt, 10
|
|
%shift = ashr i32 %a, %add
|
|
ret i32 %shift
|
|
}
|
|
|
|
; ...and again with a truncated 64-bit shift amount.
|
|
define i32 @f7(i32 %a, i64 %amt) {
|
|
; CHECK-LABEL: f7:
|
|
; CHECK: # %bb.0:
|
|
; CHECK-NEXT: sra %r2, 10(%r3)
|
|
; CHECK-NEXT: br %r14
|
|
%add = add i64 %amt, 10
|
|
%trunc = trunc i64 %add to i32
|
|
%shift = ashr i32 %a, %trunc
|
|
ret i32 %shift
|
|
}
|
|
|
|
; Check shift amounts that have the largest in-range constant term. We could
|
|
; mask the amount instead.
|
|
define i32 @f8(i32 %a, i32 %amt) {
|
|
; CHECK-LABEL: f8:
|
|
; CHECK: # %bb.0:
|
|
; CHECK-NEXT: sra %r2, 4095(%r3)
|
|
; CHECK-NEXT: br %r14
|
|
%add = add i32 %amt, 4095
|
|
%shift = ashr i32 %a, %add
|
|
ret i32 %shift
|
|
}
|
|
|
|
; Check the next value up. Again, we could mask the amount instead.
|
|
define i32 @f9(i32 %a, i32 %amt) {
|
|
; CHECK-LABEL: f9:
|
|
; CHECK: # %bb.0:
|
|
; CHECK-NEXT: ahi %r3, 4096
|
|
; CHECK-NEXT: sra %r2, 0(%r3)
|
|
; CHECK-NEXT: br %r14
|
|
%add = add i32 %amt, 4096
|
|
%shift = ashr i32 %a, %add
|
|
ret i32 %shift
|
|
}
|
|
|
|
; Check that we don't try to generate "indexed" shifts.
|
|
define i32 @f10(i32 %a, i32 %b, i32 %c) {
|
|
; CHECK-LABEL: f10:
|
|
; CHECK: # %bb.0:
|
|
; CHECK-NEXT: ar %r3, %r4
|
|
; CHECK-NEXT: sra %r2, 0(%r3)
|
|
; CHECK-NEXT: br %r14
|
|
%add = add i32 %b, %c
|
|
%shift = ashr i32 %a, %add
|
|
ret i32 %shift
|
|
}
|
|
|
|
; Check that the shift amount uses an address register. It cannot be in %r0.
|
|
define i32 @f11(i32 %a, i32 *%ptr) {
|
|
; CHECK-LABEL: f11:
|
|
; CHECK: # %bb.0:
|
|
; CHECK-NEXT: l %r1, 0(%r3)
|
|
; CHECK-NEXT: sra %r2, 0(%r1)
|
|
; CHECK-NEXT: br %r14
|
|
%amt = load i32, i32 *%ptr
|
|
%shift = ashr i32 %a, %amt
|
|
ret i32 %shift
|
|
}
|