derek.holloway
7502bf64a4
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94 lines
2.1 KiB
LLVM
94 lines
2.1 KiB
LLVM
; Test 64-bit atomic subtractions.
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z10 | FileCheck %s
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; Check subtraction of a variable.
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define i64 @f1(i64 %dummy, ptr %src, i64 %b) {
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; CHECK-LABEL: f1:
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; CHECK: lg %r2, 0(%r3)
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; CHECK: [[LABEL:\.[^:]*]]:
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; CHECK: lgr %r0, %r2
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; CHECK: sgr %r0, %r4
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; CHECK: csg %r2, %r0, 0(%r3)
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; CHECK: jl [[LABEL]]
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; CHECK: br %r14
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%res = atomicrmw sub ptr %src, i64 %b seq_cst
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ret i64 %res
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}
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; Check subtraction of 1.
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define i64 @f2(i64 %dummy, ptr %src) {
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; CHECK-LABEL: f2:
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; CHECK: lg %r2, 0(%r3)
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; CHECK: [[LABEL:\.[^:]*]]:
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; CHECK: lay %r0, -1(%r2)
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; CHECK: csg %r2, %r0, 0(%r3)
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; CHECK: jl [[LABEL]]
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; CHECK: br %r14
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%res = atomicrmw sub ptr %src, i64 1 seq_cst
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ret i64 %res
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}
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; Check use of LAY.
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define i64 @f3(i64 %dummy, ptr %src) {
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; CHECK-LABEL: f3:
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; CHECK: lay %r0, -32768(%r2)
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; CHECK: br %r14
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%res = atomicrmw sub ptr %src, i64 32768 seq_cst
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ret i64 %res
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}
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; Check the low end of the AGFI range.
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define i64 @f4(i64 %dummy, ptr %src) {
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; CHECK-LABEL: f4:
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; CHECK: agfi %r0, -2147483648
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; CHECK: br %r14
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%res = atomicrmw sub ptr %src, i64 2147483648 seq_cst
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ret i64 %res
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}
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; Check the next value up, which uses an SLGFI.
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define i64 @f5(i64 %dummy, ptr %src) {
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; CHECK-LABEL: f5:
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; CHECK: slgfi
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; CHECK: br %r14
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%res = atomicrmw sub ptr %src, i64 2147483649 seq_cst
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ret i64 %res
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}
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; Check subtraction of -1, which can use LA.
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define i64 @f6(i64 %dummy, ptr %src) {
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; CHECK-LABEL: f6:
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; CHECK: la %r0, 1(%r2)
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; CHECK: br %r14
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%res = atomicrmw sub ptr %src, i64 -1 seq_cst
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ret i64 %res
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}
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; Check use of LAY.
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define i64 @f7(i64 %dummy, ptr %src) {
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; CHECK-LABEL: f7:
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; CHECK: lay %r0, 32767(%r2)
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; CHECK: br %r14
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%res = atomicrmw sub ptr %src, i64 -32767 seq_cst
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ret i64 %res
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}
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; Check the high end of the AGFI range.
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define i64 @f8(i64 %dummy, ptr %src) {
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; CHECK-LABEL: f8:
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; CHECK: agfi %r0, 2147483647
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; CHECK: br %r14
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%res = atomicrmw sub ptr %src, i64 -2147483647 seq_cst
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ret i64 %res
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}
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; Check the next value down, which must use an ALGFI.
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define i64 @f9(i64 %dummy, ptr %src) {
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; CHECK-LABEL: f9:
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; CHECK: algfi
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; CHECK: br %r14
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%res = atomicrmw sub ptr %src, i64 -2147483648 seq_cst
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ret i64 %res
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}
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