llvm-6502/test/CodeGen/SystemZ/atomicrmw-minmax-04.ll
Richard Sandiford 793ce99ea7 [SystemZ] Automatically detect zEC12 and z196 hosts
As on other hosts, the CPU identification instruction is priveleged,
so we need to look through /proc/cpuinfo.  I copied the PowerPC way of
handling "generic".

Several tests were implicitly assuming z10 and so failed on z196.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@193742 91177308-0d34-0410-b5e6-96231b3b80d8
2013-10-31 12:14:17 +00:00

140 lines
3.7 KiB
LLVM

; Test 64-bit atomic minimum and maximum. Here we match the z10 versions,
; which can't use LOCGR.
;
; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z10 | FileCheck %s
; Check signed minium.
define i64 @f1(i64 %dummy, i64 *%src, i64 %b) {
; CHECK-LABEL: f1:
; CHECK: lg %r2, 0(%r3)
; CHECK: [[LOOP:\.[^:]*]]:
; CHECK: lgr [[NEW:%r[0-9]+]], %r2
; CHECK: cgrjle %r2, %r4, [[KEEP:\..*]]
; CHECK: lgr [[NEW]], %r4
; CHECK: csg %r2, [[NEW]], 0(%r3)
; CHECK: jl [[LOOP]]
; CHECK: br %r14
%res = atomicrmw min i64 *%src, i64 %b seq_cst
ret i64 %res
}
; Check signed maximum.
define i64 @f2(i64 %dummy, i64 *%src, i64 %b) {
; CHECK-LABEL: f2:
; CHECK: lg %r2, 0(%r3)
; CHECK: [[LOOP:\.[^:]*]]:
; CHECK: lgr [[NEW:%r[0-9]+]], %r2
; CHECK: cgrjhe %r2, %r4, [[KEEP:\..*]]
; CHECK: lgr [[NEW]], %r4
; CHECK: csg %r2, [[NEW]], 0(%r3)
; CHECK: jl [[LOOP]]
; CHECK: br %r14
%res = atomicrmw max i64 *%src, i64 %b seq_cst
ret i64 %res
}
; Check unsigned minimum.
define i64 @f3(i64 %dummy, i64 *%src, i64 %b) {
; CHECK-LABEL: f3:
; CHECK: lg %r2, 0(%r3)
; CHECK: [[LOOP:\.[^:]*]]:
; CHECK: lgr [[NEW:%r[0-9]+]], %r2
; CHECK: clgrjle %r2, %r4, [[KEEP:\..*]]
; CHECK: lgr [[NEW]], %r4
; CHECK: csg %r2, [[NEW]], 0(%r3)
; CHECK: jl [[LOOP]]
; CHECK: br %r14
%res = atomicrmw umin i64 *%src, i64 %b seq_cst
ret i64 %res
}
; Check unsigned maximum.
define i64 @f4(i64 %dummy, i64 *%src, i64 %b) {
; CHECK-LABEL: f4:
; CHECK: lg %r2, 0(%r3)
; CHECK: [[LOOP:\.[^:]*]]:
; CHECK: lgr [[NEW:%r[0-9]+]], %r2
; CHECK: clgrjhe %r2, %r4, [[KEEP:\..*]]
; CHECK: lgr [[NEW]], %r4
; CHECK: csg %r2, [[NEW]], 0(%r3)
; CHECK: jl [[LOOP]]
; CHECK: br %r14
%res = atomicrmw umax i64 *%src, i64 %b seq_cst
ret i64 %res
}
; Check the high end of the aligned CSG range.
define i64 @f5(i64 %dummy, i64 *%src, i64 %b) {
; CHECK-LABEL: f5:
; CHECK: lg %r2, 524280(%r3)
; CHECK: csg %r2, {{%r[0-9]+}}, 524280(%r3)
; CHECK: br %r14
%ptr = getelementptr i64 *%src, i64 65535
%res = atomicrmw min i64 *%ptr, i64 %b seq_cst
ret i64 %res
}
; Check the next doubleword up, which requires separate address logic.
define i64 @f6(i64 %dummy, i64 *%src, i64 %b) {
; CHECK-LABEL: f6:
; CHECK: agfi %r3, 524288
; CHECK: lg %r2, 0(%r3)
; CHECK: csg %r2, {{%r[0-9]+}}, 0(%r3)
; CHECK: br %r14
%ptr = getelementptr i64 *%src, i64 65536
%res = atomicrmw min i64 *%ptr, i64 %b seq_cst
ret i64 %res
}
; Check the low end of the CSG range.
define i64 @f7(i64 %dummy, i64 *%src, i64 %b) {
; CHECK-LABEL: f7:
; CHECK: lg %r2, -524288(%r3)
; CHECK: csg %r2, {{%r[0-9]+}}, -524288(%r3)
; CHECK: br %r14
%ptr = getelementptr i64 *%src, i64 -65536
%res = atomicrmw min i64 *%ptr, i64 %b seq_cst
ret i64 %res
}
; Check the next doubleword down, which requires separate address logic.
define i64 @f8(i64 %dummy, i64 *%src, i64 %b) {
; CHECK-LABEL: f8:
; CHECK: agfi %r3, -524296
; CHECK: lg %r2, 0(%r3)
; CHECK: csg %r2, {{%r[0-9]+}}, 0(%r3)
; CHECK: br %r14
%ptr = getelementptr i64 *%src, i64 -65537
%res = atomicrmw min i64 *%ptr, i64 %b seq_cst
ret i64 %res
}
; Check that indexed addresses are not allowed.
define i64 @f9(i64 %dummy, i64 %base, i64 %index, i64 %b) {
; CHECK-LABEL: f9:
; CHECK: agr %r3, %r4
; CHECK: lg %r2, 0(%r3)
; CHECK: csg %r2, {{%r[0-9]+}}, 0(%r3)
; CHECK: br %r14
%add = add i64 %base, %index
%ptr = inttoptr i64 %add to i64 *
%res = atomicrmw min i64 *%ptr, i64 %b seq_cst
ret i64 %res
}
; Check that constants are handled.
define i64 @f10(i64 %dummy, i64 *%ptr) {
; CHECK-LABEL: f10:
; CHECK: lghi [[LIMIT:%r[0-9]+]], 42
; CHECK: lg %r2, 0(%r3)
; CHECK: [[LOOP:\.[^:]*]]:
; CHECK: lgr [[NEW:%r[0-9]+]], %r2
; CHECK: cgrjle %r2, [[LIMIT]], [[KEEP:\..*]]
; CHECK: lghi [[NEW]], 42
; CHECK: csg %r2, [[NEW]], 0(%r3)
; CHECK: jl [[LOOP]]
; CHECK: br %r14
%res = atomicrmw min i64 *%ptr, i64 42 seq_cst
ret i64 %res
}