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llvm/test/CodeGen/X86/sibcall.ll
David Blaikie 32b845d223 [opaque pointer type] Add textual IR support for explicit type parameter to the call instruction 
See r230786 and r230794 for similar changes to gep and load
respectively.

Call is a bit different because it often doesn't have a single explicit
type - usually the type is deduced from the arguments, and just the
return type is explicit. In those cases there's no need to change the
IR.

When that's not the case, the IR usually contains the pointer type of
the first operand - but since typed pointers are going away, that
representation is insufficient so I'm just stripping the "pointerness"
of the explicit type away.

This does make the IR a bit weird - it /sort of/ reads like the type of
the first operand: "call void () %x(" but %x is actually of type "void
()*" and will eventually be just of type "ptr". But this seems not too
bad and I don't think it would benefit from repeating the type
("void (), void () * %x(" and then eventually "void (), ptr %x(") as has
been done with gep and load.

This also has a side benefit: since the explicit type is no longer a
pointer, there's no ambiguity between an explicit type and a function
that returns a function pointer. Previously this case needed an explicit
type (eg: a function returning a void() function was written as
"call void () () * @x(" rather than "call void () * @x(" because of the
ambiguity between a function returning a pointer to a void() function
and a function returning void).

No ambiguity means even function pointer return types can just be
written alone, without writing the whole function's type.

This leaves /only/ the varargs case where the explicit type is required.

Given the special type syntax in call instructions, the regex-fu used
for migration was a bit more involved in its own unique way (as every
one of these is) so here it is. Use it in conjunction with the apply.sh
script and associated find/xargs commands I've provided in rr230786 to
migrate your out of tree tests. Do let me know if any of this doesn't
cover your cases & we can iterate on a more general script/regexes to
help others with out of tree tests.

About 9 test cases couldn't be automatically migrated - half of those
were functions returning function pointers, where I just had to manually
delete the function argument types now that we didn't need an explicit
function type there. The other half were typedefs of function types used
in calls - just had to manually drop the * from those.

import fileinput
import sys
import re

pat = re.compile(r'((?:=|:|^|\s)call\s(?:[^@]*?))(\s*$|\s*(?:(?:\[\[[a-zA-Z0-9_]+\]\]|[@%](?:(")?[\\\?@a-zA-Z0-9_.]*?(?(3)"|)|{{.*}}))(?:\(|$)|undef|inttoptr|bitcast|null|asm).*$)')
addrspace_end = re.compile(r"addrspace\(\d+\)\s*\*$")
func_end = re.compile("(?:void.*|\)\s*)\*$")

def conv(match, line):
  if not match or re.search(addrspace_end, match.group(1)) or not re.search(func_end, match.group(1)):
    return line
  return line[:match.start()] + match.group(1)[:match.group(1).rfind('*')].rstrip() + match.group(2) + line[match.end():]

for line in sys.stdin:
  sys.stdout.write(conv(re.search(pat, line), line))

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@235145 91177308-0d34-0410-b5e6-96231b3b80d8
2015-04-16 23:24:18 +00:00

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; RUN: llc < %s -mtriple=i686-linux -mcpu=core2 -mattr=+sse2 -asm-verbose=false | FileCheck %s -check-prefix=32
; RUN: llc < %s -mtriple=x86_64-linux -mcpu=core2 -mattr=+sse2 -asm-verbose=false | FileCheck %s -check-prefix=64
; RUN: llc < %s -mtriple=x86_64-linux-gnux32 -mcpu=core2 -mattr=+sse2 -asm-verbose=false | FileCheck %s -check-prefix=X32ABI
define void @t1(i32 %x) nounwind ssp {
entry:
; 32-LABEL: t1:
; 32: jmp {{_?}}foo
; 64-LABEL: t1:
; 64: jmp {{_?}}foo
; X32ABI-LABEL: t1:
; X32ABI: jmp {{_?}}foo
tail call void @foo() nounwind
ret void
}
declare void @foo()
define void @t2() nounwind ssp {
entry:
; 32-LABEL: t2:
; 32: jmp {{_?}}foo2
; 64-LABEL: t2:
; 64: jmp {{_?}}foo2
; X32ABI-LABEL: t2:
; X32ABI: jmp {{_?}}foo2
%0 = tail call i32 @foo2() nounwind
ret void
}
declare i32 @foo2()
define void @t3() nounwind ssp {
entry:
; 32-LABEL: t3:
; 32: jmp {{_?}}foo3
; 64-LABEL: t3:
; 64: jmp {{_?}}foo3
; X32ABI-LABEL: t3:
; X32ABI: jmp {{_?}}foo3
%0 = tail call i32 @foo3() nounwind
ret void
}
declare i32 @foo3()
define void @t4(void (i32)* nocapture %x) nounwind ssp {
entry:
; 32-LABEL: t4:
; 32: calll *
; FIXME: gcc can generate a tailcall for this. But it's tricky.
; 64-LABEL: t4:
; 64-NOT: call
; 64: jmpq *
; X32ABI-LABEL: t4:
; X32ABI-NOT: call
; X32ABI: jmpq *
tail call void %x(i32 0) nounwind
ret void
}
define void @t5(void ()* nocapture %x) nounwind ssp {
entry:
; 32-LABEL: t5:
; 32-NOT: call
; 32: jmpl *4(%esp)
; 64-LABEL: t5:
; 64-NOT: call
; 64: jmpq *%rdi
; X32ABI-LABEL: t5:
; X32ABI-NOT: call
; FIXME: This isn't needed since x32 psABI specifies that callers must
; zero-extend pointers passed in registers.
; X32ABI: movl %edi, %eax
; X32ABI: jmpq *%rax
tail call void %x() nounwind
ret void
}
define i32 @t6(i32 %x) nounwind ssp {
entry:
; 32-LABEL: t6:
; 32: calll {{_?}}t6
; 32: jmp {{_?}}bar
; 64-LABEL: t6:
; 64: jmp {{_?}}t6
; 64: jmp {{_?}}bar
; X32ABI-LABEL: t6:
; X32ABI: jmp {{_?}}t6
; X32ABI: jmp {{_?}}bar
%0 = icmp slt i32 %x, 10
br i1 %0, label %bb, label %bb1
bb:
%1 = add nsw i32 %x, -1
%2 = tail call i32 @t6(i32 %1) nounwind ssp
ret i32 %2
bb1:
%3 = tail call i32 @bar(i32 %x) nounwind
ret i32 %3
}
declare i32 @bar(i32)
define i32 @t7(i32 %a, i32 %b, i32 %c) nounwind ssp {
entry:
; 32-LABEL: t7:
; 32: jmp {{_?}}bar2
; 64-LABEL: t7:
; 64: jmp {{_?}}bar2
; X32ABI-LABEL: t7:
; X32ABI: jmp {{_?}}bar2
%0 = tail call i32 @bar2(i32 %a, i32 %b, i32 %c) nounwind
ret i32 %0
}
declare i32 @bar2(i32, i32, i32)
define signext i16 @t8() nounwind ssp {
entry:
; 32-LABEL: t8:
; 32: jmp {{_?}}bar3
; 64-LABEL: t8:
; 64: jmp {{_?}}bar3
; X32ABI-LABEL: t8:
; X32ABI: jmp {{_?}}bar3
%0 = tail call signext i16 @bar3() nounwind ; <i16> [#uses=1]
ret i16 %0
}
declare signext i16 @bar3()
define signext i16 @t9(i32 (i32)* nocapture %x) nounwind ssp {
entry:
; 32-LABEL: t9:
; 32: calll *
; 64-LABEL: t9:
; 64: jmpq *
; X32ABI-LABEL: t9:
; X32ABI: jmpq *
%0 = bitcast i32 (i32)* %x to i16 (i32)*
%1 = tail call signext i16 %0(i32 0) nounwind
ret i16 %1
}
define void @t10() nounwind ssp {
entry:
; 32-LABEL: t10:
; 32: calll
; 64-LABEL: t10:
; 64: callq
; X32ABI-LABEL: t10:
; X32ABI: callq
%0 = tail call i32 @foo4() noreturn nounwind
unreachable
}
declare i32 @foo4()
define i32 @t11(i32 %x, i32 %y, i32 %z.0, i32 %z.1, i32 %z.2) nounwind ssp {
; In 32-bit mode, it's emitting a bunch of dead loads that are not being
; eliminated currently.
; 32-LABEL: t11:
; 32-NOT: subl ${{[0-9]+}}, %esp
; 32: je
; 32-NOT: movl
; 32-NOT: addl ${{[0-9]+}}, %esp
; 32: jmp {{_?}}foo5
; 64-LABEL: t11:
; 64-NOT: subq ${{[0-9]+}}, %rsp
; 64-NOT: addq ${{[0-9]+}}, %rsp
; 64: jmp {{_?}}foo5
; X32ABI-LABEL: t11:
; X32ABI-NOT: subl ${{[0-9]+}}, %esp
; X32ABI-NOT: addl ${{[0-9]+}}, %esp
; X32ABI: jmp {{_?}}foo5
entry:
%0 = icmp eq i32 %x, 0
br i1 %0, label %bb6, label %bb
bb:
%1 = tail call i32 @foo5(i32 %x, i32 %y, i32 %z.0, i32 %z.1, i32 %z.2) nounwind
ret i32 %1
bb6:
ret i32 0
}
declare i32 @foo5(i32, i32, i32, i32, i32)
%struct.t = type { i32, i32, i32, i32, i32 }
define i32 @t12(i32 %x, i32 %y, %struct.t* byval align 4 %z) nounwind ssp {
; 32-LABEL: t12:
; 32-NOT: subl ${{[0-9]+}}, %esp
; 32-NOT: addl ${{[0-9]+}}, %esp
; 32: jmp {{_?}}foo6
; 64-LABEL: t12:
; 64-NOT: subq ${{[0-9]+}}, %rsp
; 64-NOT: addq ${{[0-9]+}}, %rsp
; 64: jmp {{_?}}foo6
; X32ABI-LABEL: t12:
; X32ABI-NOT: subl ${{[0-9]+}}, %esp
; X32ABI-NOT: addl ${{[0-9]+}}, %esp
; X32ABI: jmp {{_?}}foo6
entry:
%0 = icmp eq i32 %x, 0
br i1 %0, label %bb2, label %bb
bb:
%1 = tail call i32 @foo6(i32 %x, i32 %y, %struct.t* byval align 4 %z) nounwind
ret i32 %1
bb2:
ret i32 0
}
declare i32 @foo6(i32, i32, %struct.t* byval align 4)
; rdar://r7717598
%struct.ns = type { i32, i32 }
%struct.cp = type { float, float, float, float, float }
define %struct.ns* @t13(%struct.cp* %yy) nounwind ssp {
; 32-LABEL: t13:
; 32-NOT: jmp
; 32: calll
; 32: ret
; 64-LABEL: t13:
; 64-NOT: jmp
; 64: callq
; 64: ret
; X32ABI-LABEL: t13:
; X32ABI-NOT: jmp
; X32ABI: callq
; X32ABI: ret
entry:
%0 = tail call fastcc %struct.ns* @foo7(%struct.cp* byval align 4 %yy, i8 signext 0) nounwind
ret %struct.ns* %0
}
; rdar://6195379
; llvm can't do sibcall for this in 32-bit mode (yet).
declare fastcc %struct.ns* @foo7(%struct.cp* byval align 4, i8 signext) nounwind ssp
%struct.__block_descriptor = type { i64, i64 }
%struct.__block_descriptor_withcopydispose = type { i64, i64, i8*, i8* }
%struct.__block_literal_1 = type { i8*, i32, i32, i8*, %struct.__block_descriptor* }
%struct.__block_literal_2 = type { i8*, i32, i32, i8*, %struct.__block_descriptor_withcopydispose*, void ()* }
define void @t14(%struct.__block_literal_2* nocapture %.block_descriptor) nounwind ssp {
entry:
; 64-LABEL: t14:
; 64: movq 32(%rdi)
; 64-NOT: movq 16(%rdi)
; 64: jmpq *16({{%rdi|%rax}})
; X32ABI-LABEL: t14:
; X32ABI: movl 20(%edi), %edi
; X32ABI-NEXT: movl 12(%edi), %eax
; X32ABI-NEXT: jmpq *%rax
%0 = getelementptr inbounds %struct.__block_literal_2, %struct.__block_literal_2* %.block_descriptor, i64 0, i32 5 ; <void ()**> [#uses=1]
%1 = load void ()*, void ()** %0, align 8 ; <void ()*> [#uses=2]
%2 = bitcast void ()* %1 to %struct.__block_literal_1* ; <%struct.__block_literal_1*> [#uses=1]
%3 = getelementptr inbounds %struct.__block_literal_1, %struct.__block_literal_1* %2, i64 0, i32 3 ; <i8**> [#uses=1]
%4 = load i8*, i8** %3, align 8 ; <i8*> [#uses=1]
%5 = bitcast i8* %4 to void (i8*)* ; <void (i8*)*> [#uses=1]
%6 = bitcast void ()* %1 to i8* ; <i8*> [#uses=1]
tail call void %5(i8* %6) nounwind
ret void
}
; rdar://7726868
%struct.foo = type { [4 x i32] }
define void @t15(%struct.foo* noalias sret %agg.result) nounwind {
; 32-LABEL: t15:
; 32: calll {{_?}}f
; 32: retl $4
; 64-LABEL: t15:
; 64: callq {{_?}}f
; 64: retq
; X32ABI-LABEL: t15:
; X32ABI: callq {{_?}}f
; X32ABI: retq
tail call fastcc void @f(%struct.foo* noalias sret %agg.result) nounwind
ret void
}
declare void @f(%struct.foo* noalias sret) nounwind
define void @t16() nounwind ssp {
entry:
; 32-LABEL: t16:
; 32: calll {{_?}}bar4
; 32: fstp
; 64-LABEL: t16:
; 64: jmp {{_?}}bar4
; X32ABI-LABEL: t16:
; X32ABI: jmp {{_?}}bar4
%0 = tail call double @bar4() nounwind
ret void
}
declare double @bar4()
; rdar://6283267
define void @t17() nounwind ssp {
entry:
; 32-LABEL: t17:
; 32: jmp {{_?}}bar5
; 64-LABEL: t17:
; 64: xorl %eax, %eax
; 64: jmp {{_?}}bar5
; X32ABI-LABEL: t17:
; X32ABI: xorl %eax, %eax
; X32ABI: jmp {{_?}}bar5
tail call void (...) @bar5() nounwind
ret void
}
declare void @bar5(...)
; rdar://7774847
define void @t18() nounwind ssp {
entry:
; 32-LABEL: t18:
; 32: calll {{_?}}bar6
; 32: fstp %st(0)
; 64-LABEL: t18:
; 64: xorl %eax, %eax
; 64: jmp {{_?}}bar6
; X32ABI-LABEL: t18:
; X32ABI: xorl %eax, %eax
; X32ABI: jmp {{_?}}bar6
%0 = tail call double (...) @bar6() nounwind
ret void
}
declare double @bar6(...)
define void @t19() alignstack(32) nounwind {
entry:
; CHECK-LABEL: t19:
; CHECK: andl $-32
; CHECK: calll {{_?}}foo
; X32ABI-LABEL: t19:
; X32ABI: andl $-32
; X32ABI: callq {{_?}}foo
tail call void @foo() nounwind
ret void
}
; If caller / callee calling convention mismatch then check if the return
; values are returned in the same registers.
; rdar://7874780
define double @t20(double %x) nounwind {
entry:
; 32-LABEL: t20:
; 32: calll {{_?}}foo20
; 32: fldl (%esp)
; 64-LABEL: t20:
; 64: jmp {{_?}}foo20
; X32ABI-LABEL: t20:
; X32ABI: jmp {{_?}}foo20
%0 = tail call fastcc double @foo20(double %x) nounwind
ret double %0
}
declare fastcc double @foo20(double) nounwind
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