forked from OSchip/llvm-project
197 lines
5.5 KiB
LLVM
197 lines
5.5 KiB
LLVM
; Test 32-bit compare and swap.
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
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; Check the low end of the CS range.
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define i32 @f1(i32 %cmp, i32 %swap, i32 *%src) {
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; CHECK-LABEL: f1:
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; CHECK: cs %r2, %r3, 0(%r4)
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; CHECK: br %r14
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%pair = cmpxchg i32 *%src, i32 %cmp, i32 %swap seq_cst seq_cst
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%val = extractvalue { i32, i1 } %pair, 0
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ret i32 %val
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}
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; Check the high end of the aligned CS range.
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define i32 @f2(i32 %cmp, i32 %swap, i32 *%src) {
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; CHECK-LABEL: f2:
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; CHECK: cs %r2, %r3, 4092(%r4)
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; CHECK: br %r14
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%ptr = getelementptr i32, i32 *%src, i64 1023
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%pair = cmpxchg i32 *%ptr, i32 %cmp, i32 %swap seq_cst seq_cst
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%val = extractvalue { i32, i1 } %pair, 0
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ret i32 %val
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}
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; Check the next word up, which should use CSY instead of CS.
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define i32 @f3(i32 %cmp, i32 %swap, i32 *%src) {
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; CHECK-LABEL: f3:
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; CHECK: csy %r2, %r3, 4096(%r4)
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; CHECK: br %r14
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%ptr = getelementptr i32, i32 *%src, i64 1024
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%pair = cmpxchg i32 *%ptr, i32 %cmp, i32 %swap seq_cst seq_cst
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%val = extractvalue { i32, i1 } %pair, 0
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ret i32 %val
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}
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; Check the high end of the aligned CSY range.
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define i32 @f4(i32 %cmp, i32 %swap, i32 *%src) {
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; CHECK-LABEL: f4:
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; CHECK: csy %r2, %r3, 524284(%r4)
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; CHECK: br %r14
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%ptr = getelementptr i32, i32 *%src, i64 131071
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%pair = cmpxchg i32 *%ptr, i32 %cmp, i32 %swap seq_cst seq_cst
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%val = extractvalue { i32, i1 } %pair, 0
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ret i32 %val
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}
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; Check the next word up, which needs separate address logic.
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; Other sequences besides this one would be OK.
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define i32 @f5(i32 %cmp, i32 %swap, i32 *%src) {
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; CHECK-LABEL: f5:
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; CHECK: agfi %r4, 524288
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; CHECK: cs %r2, %r3, 0(%r4)
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; CHECK: br %r14
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%ptr = getelementptr i32, i32 *%src, i64 131072
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%pair = cmpxchg i32 *%ptr, i32 %cmp, i32 %swap seq_cst seq_cst
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%val = extractvalue { i32, i1 } %pair, 0
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ret i32 %val
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}
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; Check the high end of the negative aligned CSY range.
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define i32 @f6(i32 %cmp, i32 %swap, i32 *%src) {
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; CHECK-LABEL: f6:
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; CHECK: csy %r2, %r3, -4(%r4)
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; CHECK: br %r14
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%ptr = getelementptr i32, i32 *%src, i64 -1
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%pair = cmpxchg i32 *%ptr, i32 %cmp, i32 %swap seq_cst seq_cst
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%val = extractvalue { i32, i1 } %pair, 0
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ret i32 %val
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}
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; Check the low end of the CSY range.
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define i32 @f7(i32 %cmp, i32 %swap, i32 *%src) {
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; CHECK-LABEL: f7:
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; CHECK: csy %r2, %r3, -524288(%r4)
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; CHECK: br %r14
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%ptr = getelementptr i32, i32 *%src, i64 -131072
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%pair = cmpxchg i32 *%ptr, i32 %cmp, i32 %swap seq_cst seq_cst
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%val = extractvalue { i32, i1 } %pair, 0
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ret i32 %val
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}
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; Check the next word down, which needs separate address logic.
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; Other sequences besides this one would be OK.
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define i32 @f8(i32 %cmp, i32 %swap, i32 *%src) {
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; CHECK-LABEL: f8:
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; CHECK: agfi %r4, -524292
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; CHECK: cs %r2, %r3, 0(%r4)
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; CHECK: br %r14
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%ptr = getelementptr i32, i32 *%src, i64 -131073
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%pair = cmpxchg i32 *%ptr, i32 %cmp, i32 %swap seq_cst seq_cst
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%val = extractvalue { i32, i1 } %pair, 0
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ret i32 %val
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}
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; Check that CS does not allow an index.
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define i32 @f9(i32 %cmp, i32 %swap, i64 %src, i64 %index) {
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; CHECK-LABEL: f9:
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; CHECK: agr %r4, %r5
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; CHECK: cs %r2, %r3, 0(%r4)
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; CHECK: br %r14
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%add1 = add i64 %src, %index
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%ptr = inttoptr i64 %add1 to i32 *
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%pair = cmpxchg i32 *%ptr, i32 %cmp, i32 %swap seq_cst seq_cst
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%val = extractvalue { i32, i1 } %pair, 0
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ret i32 %val
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}
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; Check that CSY does not allow an index.
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define i32 @f10(i32 %cmp, i32 %swap, i64 %src, i64 %index) {
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; CHECK-LABEL: f10:
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; CHECK: agr %r4, %r5
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; CHECK: csy %r2, %r3, 4096(%r4)
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; CHECK: br %r14
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%add1 = add i64 %src, %index
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%add2 = add i64 %add1, 4096
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%ptr = inttoptr i64 %add2 to i32 *
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%pair = cmpxchg i32 *%ptr, i32 %cmp, i32 %swap seq_cst seq_cst
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%val = extractvalue { i32, i1 } %pair, 0
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ret i32 %val
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}
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; Check that a constant %cmp value is loaded into a register first.
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define i32 @f11(i32 %dummy, i32 %swap, i32 *%ptr) {
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; CHECK-LABEL: f11:
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; CHECK: lhi %r2, 1001
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; CHECK: cs %r2, %r3, 0(%r4)
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; CHECK: br %r14
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%pair = cmpxchg i32 *%ptr, i32 1001, i32 %swap seq_cst seq_cst
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%val = extractvalue { i32, i1 } %pair, 0
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ret i32 %val
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}
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; Check that a constant %swap value is loaded into a register first.
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define i32 @f12(i32 %cmp, i32 *%ptr) {
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; CHECK-LABEL: f12:
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; CHECK: lhi [[SWAP:%r[0-9]+]], 1002
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; CHECK: cs %r2, [[SWAP]], 0(%r3)
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; CHECK: br %r14
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%pair = cmpxchg i32 *%ptr, i32 %cmp, i32 1002 seq_cst seq_cst
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%val = extractvalue { i32, i1 } %pair, 0
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ret i32 %val
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}
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; Check generating the comparison result.
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; CHECK-LABEL: f13
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; CHECK: cs %r2, %r3, 0(%r4)
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; CHECK-NEXT: ipm %r2
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; CHECK-NEXT: afi %r2, -268435456
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; CHECK-NEXT: srl %r2, 31
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; CHECK: br %r14
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define i32 @f13(i32 %cmp, i32 %swap, i32 *%src) {
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%pairval = cmpxchg i32 *%src, i32 %cmp, i32 %swap seq_cst seq_cst
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%val = extractvalue { i32, i1 } %pairval, 1
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%res = zext i1 %val to i32
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ret i32 %res
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}
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declare void @g()
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; Check using the comparison result for a branch.
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; CHECK-LABEL: f14
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; CHECK: cs %r2, %r3, 0(%r4)
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; CHECK-NEXT: jge g
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; CHECK: br %r14
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define void @f14(i32 %cmp, i32 %swap, i32 *%src) {
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%pairval = cmpxchg i32 *%src, i32 %cmp, i32 %swap seq_cst seq_cst
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%cond = extractvalue { i32, i1 } %pairval, 1
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br i1 %cond, label %call, label %exit
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call:
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tail call void @g()
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br label %exit
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exit:
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ret void
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}
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; ... and the same with the inverted direction.
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; CHECK-LABEL: f15
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; CHECK: cs %r2, %r3, 0(%r4)
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; CHECK-NEXT: jgl g
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; CHECK: br %r14
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define void @f15(i32 %cmp, i32 %swap, i32 *%src) {
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%pairval = cmpxchg i32 *%src, i32 %cmp, i32 %swap seq_cst seq_cst
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%cond = extractvalue { i32, i1 } %pairval, 1
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br i1 %cond, label %exit, label %call
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call:
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tail call void @g()
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br label %exit
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exit:
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ret void
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}
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