derek.holloway
7502bf64a4
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95 lines
2.2 KiB
LLVM
95 lines
2.2 KiB
LLVM
; Test 32-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 i32 @f1(i32 %dummy, ptr %src, i32 %b) {
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; CHECK-LABEL: f1:
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; CHECK: l %r2, 0(%r3)
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; CHECK: [[LABEL:\.[^:]*]]:
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; CHECK: lr %r0, %r2
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; CHECK: sr %r0, %r4
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; CHECK: cs %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, i32 %b seq_cst
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ret i32 %res
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}
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; Check subtraction of 1, which can use AHI.
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define i32 @f2(i32 %dummy, ptr %src) {
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; CHECK-LABEL: f2:
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; CHECK: l %r2, 0(%r3)
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; CHECK: [[LABEL:\.[^:]*]]:
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; CHECK: lr %r0, %r2
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; CHECK: ahi %r0, -1
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; CHECK: cs %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, i32 1 seq_cst
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ret i32 %res
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}
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; Check the low end of the AHI range.
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define i32 @f3(i32 %dummy, ptr %src) {
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; CHECK-LABEL: f3:
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; CHECK: ahi %r0, -32768
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; CHECK: br %r14
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%res = atomicrmw sub ptr %src, i32 32768 seq_cst
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ret i32 %res
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}
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; Check the next value down, which must use AFI.
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define i32 @f4(i32 %dummy, ptr %src) {
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; CHECK-LABEL: f4:
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; CHECK: afi %r0, -32769
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; CHECK: br %r14
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%res = atomicrmw sub ptr %src, i32 32769 seq_cst
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ret i32 %res
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}
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; Check the low end of the AFI range.
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define i32 @f5(i32 %dummy, ptr %src) {
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; CHECK-LABEL: f5:
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; CHECK: afi %r0, -2147483648
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; CHECK: br %r14
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%res = atomicrmw sub ptr %src, i32 2147483648 seq_cst
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ret i32 %res
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}
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; Check the next value up, which gets treated as a positive operand.
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define i32 @f6(i32 %dummy, ptr %src) {
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; CHECK-LABEL: f6:
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; CHECK: afi %r0, 2147483647
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; CHECK: br %r14
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%res = atomicrmw sub ptr %src, i32 2147483649 seq_cst
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ret i32 %res
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}
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; Check subtraction of -1, which can use AHI.
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define i32 @f7(i32 %dummy, ptr %src) {
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; CHECK-LABEL: f7:
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; CHECK: ahi %r0, 1
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; CHECK: br %r14
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%res = atomicrmw sub ptr %src, i32 -1 seq_cst
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ret i32 %res
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}
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; Check the high end of the AHI range.
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define i32 @f8(i32 %dummy, ptr %src) {
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; CHECK-LABEL: f8:
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; CHECK: ahi %r0, 32767
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; CHECK: br %r14
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%res = atomicrmw sub ptr %src, i32 -32767 seq_cst
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ret i32 %res
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}
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; Check the next value down, which must use AFI instead.
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define i32 @f9(i32 %dummy, ptr %src) {
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; CHECK-LABEL: f9:
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; CHECK: afi %r0, 32768
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; CHECK: br %r14
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%res = atomicrmw sub ptr %src, i32 -32768 seq_cst
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ret i32 %res
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}
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