78 lines
1.7 KiB
LLVM
78 lines
1.7 KiB
LLVM
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; RUN: opt -codegenprepare -S < %s | FileCheck %s
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target triple = "armv8m.main-none-eabi"
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declare i8* @f0()
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declare i8* @f1()
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define i8* @tail_dup() {
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; CHECK-LABEL: tail_dup
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; CHECK: tail call i8* @f0()
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; CHECK-NEXT: ret i8*
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; CHECK: tail call i8* @f1()
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; CHECK-NEXT: ret i8*
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bb0:
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%tmp0 = tail call i8* @f0()
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br label %return
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bb1:
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%tmp1 = tail call i8* @f1()
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br label %return
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return:
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%retval = phi i8* [ %tmp0, %bb0 ], [ %tmp1, %bb1 ]
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ret i8* %retval
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}
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define nonnull i8* @nonnull_dup() {
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; CHECK-LABEL: nonnull_dup
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; CHECK: tail call i8* @f0()
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; CHECK-NEXT: ret i8*
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; CHECK: tail call i8* @f1()
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; CHECK-NEXT: ret i8*
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bb0:
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%tmp0 = tail call i8* @f0()
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br label %return
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bb1:
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%tmp1 = tail call i8* @f1()
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br label %return
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return:
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%retval = phi i8* [ %tmp0, %bb0 ], [ %tmp1, %bb1 ]
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ret i8* %retval
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}
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define i8* @noalias_dup() {
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; CHECK-LABEL: noalias_dup
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; CHECK: tail call noalias i8* @f0()
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; CHECK-NEXT: ret i8*
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; CHECK: tail call noalias i8* @f1()
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; CHECK-NEXT: ret i8*
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bb0:
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%tmp0 = tail call noalias i8* @f0()
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br label %return
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bb1:
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%tmp1 = tail call noalias i8* @f1()
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br label %return
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return:
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%retval = phi i8* [ %tmp0, %bb0 ], [ %tmp1, %bb1 ]
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ret i8* %retval
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}
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; Use inreg as a way of testing that attributes (other than nonnull and
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; noalias) disable the tailcall duplication in cgp.
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define inreg i8* @inreg_nodup() {
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; CHECK-LABEL: inreg_nodup
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; CHECK: tail call i8* @f0()
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; CHECK-NEXT: br label %return
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; CHECK: tail call i8* @f1()
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; CHECK-NEXT: br label %return
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bb0:
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%tmp0 = tail call i8* @f0()
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br label %return
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bb1:
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%tmp1 = tail call i8* @f1()
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br label %return
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return:
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%retval = phi i8* [ %tmp0, %bb0 ], [ %tmp1, %bb1 ]
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ret i8* %retval
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}
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