47 lines
950 B
LLVM
47 lines
950 B
LLVM
; Test SystemZInstrInfo::AnalyzeBranch and SystemZInstrInfo::InsertBranch.
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
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declare void @foo() noreturn
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; Check a case where a separate branch is needed and where the original
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; order should be reversed.
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define i32 @f1(i32 %a, i32 *%bptr) {
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; CHECK-LABEL: f1:
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; CHECK: cl %r2, 0(%r3)
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; CHECK: jl .L[[LABEL:.*]]
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; CHECK: br %r14
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; CHECK: .L[[LABEL]]:
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; CHECK: brasl %r14, foo@PLT
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entry:
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%b = load i32 , i32 *%bptr
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%cmp = icmp ult i32 %a, %b
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br i1 %cmp, label %callit, label %return
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callit:
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call void @foo()
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unreachable
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return:
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ret i32 1
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}
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; Same again with a fused compare and branch.
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define i32 @f2(i32 %a) {
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; CHECK-LABEL: f2:
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; CHECK: cije %r2, 0, .L[[LABEL:.*]]
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; CHECK: br %r14
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; CHECK: .L[[LABEL]]:
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; CHECK: brasl %r14, foo@PLT
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entry:
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%cmp = icmp eq i32 %a, 0
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br i1 %cmp, label %callit, label %return
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callit:
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call void @foo()
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unreachable
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return:
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ret i32 1
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}
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