39 lines
795 B
LLVM
39 lines
795 B
LLVM
; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z15 | FileCheck %s
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;
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; Test that a CC result of a sub that can overflow is tested with the right predicate.
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define i32 @fun0(i32 %a, i32 %b, ptr %dest) {
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; CHECK-LABEL: fun0
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; CHECK: s %r2, 0(%r4)
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; CHECK: bner %r14
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entry:
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%cur = load i32, ptr %dest
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%res = sub nsw i32 %a, %cur
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%cmp = icmp ne i32 %a, %cur
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br i1 %cmp, label %exit, label %store
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store:
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store i32 %b, ptr %dest
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br label %exit
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exit:
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ret i32 %res
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}
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define i32 @fun1(i32 %a, i32 %b, ptr %dest) {
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; CHECK-LABEL: fun1
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; CHECK: s %r2, 0(%r4)
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; CHECK: bner %r14
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entry:
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%cur = load i32, ptr %dest
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%res = sub nuw i32 %a, %cur
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%cmp = icmp ne i32 %a, %cur
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br i1 %cmp, label %exit, label %store
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store:
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store i32 %b, ptr %dest
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br label %exit
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exit:
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ret i32 %res
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}
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