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llvm-mirror/test/CodeGen/SystemZ/atomicrmw-xor-03.ll
Richard Sandiford f4f67cacd7 [SystemZ] Add NRK, ORK and XRK
The atomic tests assume the two-operand forms, so I've restricted them to z10.

Running and-01.ll, or-01.ll and xor-01.ll for z196 as well as z10 shows why
using convertToThreeAddress() is better than exposing the three-operand forms
first and then converting back to two operands where possible (which is what
I'd originally tried).  Using the three-operand form first stops us from
taking advantage of NG, OG and XG for spills.

llvm-svn: 186683
2013-07-19 16:21:55 +00:00

50 lines
1.1 KiB
LLVM

; Test 32-bit atomic XORs.
;
; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z10 | FileCheck %s
; Check XORs of a variable.
define i32 @f1(i32 %dummy, i32 *%src, i32 %b) {
; CHECK-LABEL: f1:
; CHECK: l %r2, 0(%r3)
; CHECK: [[LABEL:\.[^ ]*]]:
; CHECK: lr %r0, %r2
; CHECK: xr %r0, %r4
; CHECK: cs %r2, %r0, 0(%r3)
; CHECK: jlh [[LABEL]]
; CHECK: br %r14
%res = atomicrmw xor i32 *%src, i32 %b seq_cst
ret i32 %res
}
; Check the lowest useful constant.
define i32 @f2(i32 %dummy, i32 *%src) {
; CHECK-LABEL: f2:
; CHECK: l %r2, 0(%r3)
; CHECK: [[LABEL:\.[^ ]*]]:
; CHECK: lr %r0, %r2
; CHECK: xilf %r0, 1
; CHECK: cs %r2, %r0, 0(%r3)
; CHECK: jlh [[LABEL]]
; CHECK: br %r14
%res = atomicrmw xor i32 *%src, i32 1 seq_cst
ret i32 %res
}
; Check an arbitrary constant.
define i32 @f3(i32 %dummy, i32 *%src) {
; CHECK-LABEL: f3:
; CHECK: xilf %r0, 3000000000
; CHECK: br %r14
%res = atomicrmw xor i32 *%src, i32 3000000000 seq_cst
ret i32 %res
}
; Check bitwise negation.
define i32 @f4(i32 %dummy, i32 *%src) {
; CHECK-LABEL: f4:
; CHECK: xilf %r0, 4294967295
; CHECK: br %r14
%res = atomicrmw xor i32 *%src, i32 -1 seq_cst
ret i32 %res
}