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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -aa-pipeline=basic-aa -passes='function(tailcallelim),cgscc(inline,function(instcombine,dse))' -S | FileCheck %s
; PR7272
; Calls that capture byval parameters cannot be marked as tail calls. Other
; tails that don't capture byval parameters can still be tail calls.
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:32:32-n8:16:32"
target triple = "i386-pc-linux-gnu"
declare void @ext(ptr)
define void @bar(ptr byval(i32) %x) {
; CHECK-LABEL: @bar(
; CHECK-NEXT: call void @ext(ptr nonnull [[X:%.*]])
; CHECK-NEXT: ret void
;
call void @ext(ptr %x)
ret void
}
define void @foo(ptr %x) {
; CHECK-LABEL: @foo(
; CHECK-NEXT: [[X1:%.*]] = alloca i32, align 4
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 4, ptr nonnull [[X1]])
; CHECK-NEXT: [[TMP2:%.*]] = load i32, ptr [[X:%.*]], align 1
; CHECK-NEXT: store i32 [[TMP2]], ptr [[X1]], align 4
; CHECK-NEXT: call void @ext(ptr nonnull [[X1]])
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 4, ptr nonnull [[X1]])
; CHECK-NEXT: ret void
;
call void @bar(ptr byval(i32) %x)
ret void
}
define internal void @qux(ptr byval(i32) %x) {
call void @ext(ptr %x)
tail call void @ext(ptr null)
ret void
}
define void @frob(ptr %x) {
; CHECK-LABEL: @frob(
; CHECK-NEXT: [[X1:%.*]] = alloca i32, align 4
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 4, ptr nonnull [[X1]])
; CHECK-NEXT: [[TMP2:%.*]] = load i32, ptr [[X:%.*]], align 1
; CHECK-NEXT: store i32 [[TMP2]], ptr [[X1]], align 4
; CHECK-NEXT: call void @ext(ptr nonnull [[X1]])
; CHECK-NEXT: tail call void @ext(ptr null)
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 4, ptr nonnull [[X1]])
; CHECK-NEXT: ret void
;
tail call void @qux(ptr byval(i32) %x)
ret void
}
; A byval parameter passed into a function which is passed out as byval does
; not block the call from being marked as tail.
declare void @ext2(ptr byval(i32))
define void @bar2(ptr byval(i32) %x) {
; CHECK-LABEL: @bar2(
; CHECK-NEXT: tail call void @ext2(ptr nonnull byval(i32) [[X:%.*]])
; CHECK-NEXT: ret void
;
call void @ext2(ptr byval(i32) %x)
ret void
}
define void @foobar(ptr %x) {
; CHECK-LABEL: @foobar(
; CHECK-NEXT: [[X1:%.*]] = alloca i32, align 4
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 4, ptr nonnull [[X1]])
; CHECK-NEXT: [[TMP2:%.*]] = load i32, ptr [[X:%.*]], align 1
; CHECK-NEXT: store i32 [[TMP2]], ptr [[X1]], align 4
; CHECK-NEXT: tail call void @ext2(ptr nonnull byval(i32) [[X1]])
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 4, ptr nonnull [[X1]])
; CHECK-NEXT: ret void
;
tail call void @bar2(ptr byval(i32) %x)
ret void
}
define void @barfoo() {
; CHECK-LABEL: @barfoo(
; CHECK-NEXT: [[X1:%.*]] = alloca i32, align 4
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 4, ptr nonnull [[X1]])
; CHECK-NEXT: tail call void @ext2(ptr nonnull byval(i32) [[X1]])
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 4, ptr nonnull [[X1]])
; CHECK-NEXT: ret void
;
%x = alloca i32
tail call void @bar2(ptr byval(i32) %x)
ret void
}
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