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clang-p2996/llvm/test/CodeGen/PowerPC/aix_gpr_param.ll
Jason Liu 60ec248148 [AIX] Implement function descriptor on SDAG 
Summary:
(1) Function descriptor on AIX
On AIX, a called routine may have 2 distinct symbols associated with it:
 * A function descriptor (Name)
 * A function entry point (.Name)

The descriptor structure on AIX is the same as those in the ELF V1 ABI:
 * The address of the entry point of the function.
 * The TOC base address for the function.
 * The environment pointer.

The descriptor symbol uses the same name as the source level function in C.
The function entry point is analogous to the symbol we would generate for a
 function in a non-descriptor-based ABI, except that it is renamed by
prepending a ".".

Which symbol gets referenced depends on the context:
 * Taking the address of the function references the descriptor symbol.
 * Calling the function references the entry point symbol.

(2) Speaking of implementation on AIX, for direct function call target, we
 create proper MCSymbol SDNode(e.g . ".foo") while constructing SDAG to
 replace original TargetGlobalAddress SDNode. Then down the path, we can
 take advantage of this MCSymbol.

Patch by: Xiangling_L

Reviewed by: sfertile, hubert.reinterpretcast, jasonliu, syzaara

Differential Revision: https://reviews.llvm.org/D62532

llvm-svn: 362735
2019-06-06 19:13:36 +00:00

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; RUN: llc -mtriple powerpc-ibm-aix-xcoff -stop-after=machine-cp < %s | \
; RUN: FileCheck --check-prefix=32BIT %s
; RUN: llc -mtriple powerpc64-ibm-aix-xcoff -stop-after=machine-cp < %s | \
; RUN: FileCheck --check-prefix=64BIT %s
define void @call_test_char() {
entry:
; 32BIT: ADJCALLSTACKDOWN 56, 0, implicit-def dead $r1, implicit $r1
; 32BIT: $r3 = LI 97
; 32BIT: BL_NOP <mcsymbol .test_char>, csr_aix32, implicit-def dead $lr, implicit $rm, implicit killed $r3, implicit $r2, implicit-def $r1
; 32BIT: ADJCALLSTACKUP 56, 0, implicit-def dead $r1, implicit $r1
; 64BIT: ADJCALLSTACKDOWN 112, 0, implicit-def dead $r1, implicit $r1
; 64BIT: $x3 = LI8 97
; 64BIT: BL8_NOP <mcsymbol .test_char>, csr_aix64, implicit-def dead $lr8, implicit $rm, implicit killed $x3, implicit $x2, implicit-def $r1
; 64BIT: ADJCALLSTACKUP 112, 0, implicit-def dead $r1, implicit $r1
call void @test_char(i8 signext 97)
ret void
}
define void @call_test_chars() {
entry:
; 32BIT: ADJCALLSTACKDOWN 56, 0, implicit-def dead $r1, implicit $r1
; 32BIT: $r3 = LI 97
; 32BIT: $r4 = LI 97
; 32BIT: $r5 = LI 97
; 32BIT: $r6 = LI 97
; 32BIT: BL_NOP <mcsymbol .test_chars>, csr_aix32, implicit-def dead $lr, implicit $rm, implicit killed $r3, implicit killed $r4, implicit killed $r5, implicit killed $r6, implicit $r2, implicit-def $r1
; 32BIT: ADJCALLSTACKUP 56, 0, implicit-def dead $r1, implicit $r1
; 64BIT: ADJCALLSTACKDOWN 112, 0, implicit-def dead $r1, implicit $r1
; 64BIT: $x3 = LI8 97
; 64BIT: $x4 = LI8 97
; 64BIT: $x5 = LI8 97
; 64BIT: $x6 = LI8 97
; 64BIT: BL8_NOP <mcsymbol .test_chars>, csr_aix64, implicit-def dead $lr8, implicit $rm, implicit killed $x3, implicit killed $x4, implicit killed $x5, implicit killed $x6, implicit $x2, implicit-def $r1
; 64BIT: ADJCALLSTACKUP 112, 0, implicit-def dead $r1, implicit $r1
call void @test_chars(i8 signext 97, i8 signext 97, i8 signext 97, i8 signext 97)
ret void
}
define void @call_test_chars_mix() {
entry:
; 32BIT: ADJCALLSTACKDOWN 56, 0, implicit-def dead $r1, implicit $r1
; 32BIT: $r3 = LI 97
; 32BIT: $r4 = LI 225
; 32BIT: $r5 = LI 97
; 32BIT: $r6 = LI -31
; 32BIT: BL_NOP <mcsymbol .test_chars_mix>, csr_aix32, implicit-def dead $lr, implicit $rm, implicit killed $r3, implicit killed $r4, implicit killed $r5, implicit killed $r6, implicit $r2, implicit-def $r1
; 32BIT: ADJCALLSTACKUP 56, 0, implicit-def dead $r1, implicit $r1
; 64BIT: ADJCALLSTACKDOWN 112, 0, implicit-def dead $r1, implicit $r1
; 64BIT: $x3 = LI8 97
; 64BIT: $x4 = LI8 225
; 64BIT: $x5 = LI8 97
; 64BIT: $x6 = LI8 -31
; 64BIT: BL8_NOP <mcsymbol .test_chars_mix>, csr_aix64, implicit-def dead $lr8, implicit $rm, implicit killed $x3, implicit killed $x4, implicit killed $x5, implicit killed $x6, implicit $x2, implicit-def $r1
; 64BIT: ADJCALLSTACKUP 112, 0, implicit-def dead $r1, implicit $r1
call void @test_chars_mix(i8 signext 97, i8 zeroext -31, i8 zeroext 97, i8 signext -31)
ret void
}
define void @call_test_int() {
entry:
; 32BIT: ADJCALLSTACKDOWN 56, 0, implicit-def dead $r1, implicit $r1
; 32BIT: $r3 = LI 1
; 32BIT: BL_NOP <mcsymbol .test_int>, csr_aix32, implicit-def dead $lr, implicit $rm, implicit killed $r3, implicit $r2, implicit-def $r1
; 32BIT: ADJCALLSTACKUP 56, 0, implicit-def dead $r1, implicit $r1
; 64BIT: ADJCALLSTACKDOWN 112, 0, implicit-def dead $r1, implicit $r1
; 64BIT: $x3 = LI8 1
; 64BIT: BL8_NOP <mcsymbol .test_int>, csr_aix64, implicit-def dead $lr8, implicit $rm, implicit killed $x3, implicit $x2, implicit-def $r1
; 64BIT: ADJCALLSTACKUP 112, 0, implicit-def dead $r1, implicit $r1
call void @test_int(i32 1)
ret void
}
define void @call_test_ints() {
entry:
; 32BIT: ADJCALLSTACKDOWN 56, 0, implicit-def dead $r1, implicit $r1
; 32BIT: $r3 = LI 1
; 32BIT: $r4 = LI 1
; 32BIT: $r5 = LI 1
; 32BIT: $r6 = LI 1
; 32BIT: $r7 = LI 1
; 32BIT: $r8 = LI 1
; 32BIT: $r9 = LI 1
; 32BIT: $r10 = LI 1
; 32BIT: BL_NOP <mcsymbol .test_ints>, csr_aix32, implicit-def dead $lr, implicit $rm, implicit killed $r3, implicit killed $r4, implicit killed $r5, implicit killed $r6, implicit killed $r7, implicit killed $r8, implicit killed $r9, implicit killed $r10, implicit $r2, implicit-def $r1
; 32BIT: ADJCALLSTACKUP 56, 0, implicit-def dead $r1, implicit $r1
; 64BIT: ADJCALLSTACKDOWN 112, 0, implicit-def dead $r1, implicit $r1
; 64BIT: $x3 = LI8 1
; 64BIT: $x4 = LI8 1
; 64BIT: $x5 = LI8 1
; 64BIT: $x6 = LI8 1
; 64BIT: $x7 = LI8 1
; 64BIT: $x8 = LI8 1
; 64BIT: $x9 = LI8 1
; 64BIT: $x10 = LI8 1
; 64BIT: BL8_NOP <mcsymbol .test_ints>, csr_aix64, implicit-def dead $lr8, implicit $rm, implicit killed $x3, implicit killed $x4, implicit killed $x5, implicit killed $x6, implicit killed $x7, implicit killed $x8, implicit killed $x9, implicit killed $x10, implicit $x2, implicit-def $r1
; 64BIT: ADJCALLSTACKUP 112, 0, implicit-def dead $r1, implicit $r1
call void @test_ints(i32 1, i32 1, i32 1, i32 1, i32 1, i32 1, i32 1, i32 1)
ret void
}
define void @call_test_ints_64bit() {
entry:
; 64BIT: ADJCALLSTACKDOWN 112, 0, implicit-def dead $r1, implicit $r1
; 64BIT: renamable $x3 = LI8 1
; 64BIT: renamable $x5 = RLDICR killed renamable $x3, 31, 32
; 64BIT: $x3 = LI8 1
; 64BIT: $x4 = LI8 1
; 64BIT: $x6 = LIS8 32768
; 64BIT: $x7 = LI8 1
; 64BIT: $x8 = LI8 1
; 64BIT: $x9 = LI8 1
; 64BIT: $x10 = LI8 1
; 64BIT: BL8_NOP <mcsymbol .test_ints_64bit>, csr_aix64, implicit-def dead $lr8, implicit $rm, implicit $x3, implicit killed $x4, implicit $x5, implicit killed $x6, implicit killed $x7, implicit killed $x8, implicit killed $x9, implicit killed $x10, implicit $x2, implicit-def $r1
; 64BIT: ADJCALLSTACKUP 112, 0, implicit-def dead $r1, implicit $r1
call void @test_ints_64bit(i32 signext 1, i32 zeroext 1, i32 zeroext 2147483648, i32 signext -2147483648, i32 signext 1, i32 signext 1, i32 signext 1, i32 signext 1)
ret void
}
define void @call_test_i1() {
entry:
; 32BIT: ADJCALLSTACKDOWN 56, 0, implicit-def dead $r1, implicit $r1
; 32BIT: $r3 = LI 1
; 32BIT: BL_NOP <mcsymbol .test_i1>, csr_aix32, implicit-def dead $lr, implicit $rm, implicit killed $r3, implicit $r2, implicit-def $r1
; 32BIT: ADJCALLSTACKUP 56, 0, implicit-def dead $r1, implicit $r1
; 64BIT: ADJCALLSTACKDOWN 112, 0, implicit-def dead $r1, implicit $r1
; 64BIT: $x3 = LI8 1
; 64BIT: BL8_NOP <mcsymbol .test_i1>, csr_aix64, implicit-def dead $lr8, implicit $rm, implicit killed $x3, implicit $x2, implicit-def $r1
; 64BIT: ADJCALLSTACKUP 112, 0, implicit-def dead $r1, implicit $r1
call void @test_i1(i1 1)
ret void
}
define void @call_test_i64() {
entry:
; 32BIT: ADJCALLSTACKDOWN 56, 0, implicit-def dead $r1, implicit $r1
; 32BIT: $r3 = LI 0
; 32BIT: $r4 = LI 1
; 32BIT: BL_NOP <mcsymbol .test_i64>, csr_aix32, implicit-def dead $lr, implicit $rm, implicit killed $r3, implicit killed $r4, implicit $r2, implicit-def $r1
; 32BIT: ADJCALLSTACKUP 56, 0, implicit-def dead $r1, implicit $r1
; 64BIT: ADJCALLSTACKDOWN 112, 0, implicit-def dead $r1, implicit $r1
; 64BIT: $x3 = LI8 1
; 64BIT: BL8_NOP <mcsymbol .test_i64>, csr_aix64, implicit-def dead $lr8, implicit $rm, implicit killed $x3, implicit $x2, implicit-def $r1
; 64BIT: ADJCALLSTACKUP 112, 0, implicit-def dead $r1, implicit $r1
call void @test_i64(i64 1)
ret void
}
define void @call_test_int_ptr() {
entry:
%b = alloca i32, align 4
; 32BIT: ADJCALLSTACKDOWN 56, 0, implicit-def dead $r1, implicit $r1
; 32BIT: renamable $r3 = ADDI %stack.0.b, 0
; 32BIT: BL_NOP <mcsymbol .test_int_ptr>, csr_aix32, implicit-def dead $lr, implicit $rm, implicit $r3, implicit $r2, implicit-def $r1
; 32BIT: ADJCALLSTACKUP 56, 0, implicit-def dead $r1, implicit $r1
; 64BIT: ADJCALLSTACKDOWN 112, 0, implicit-def dead $r1, implicit $r1
; 64BIT: renamable $x3 = ADDI8 %stack.0.b, 0
; 64BIT: BL8_NOP <mcsymbol .test_int_ptr>, csr_aix64, implicit-def dead $lr8, implicit $rm, implicit $x3, implicit $x2, implicit-def $r1
; 64BIT: ADJCALLSTACKUP 112, 0, implicit-def dead $r1, implicit $r1
store i32 0, i32* %b, align 4
call void @test_int_ptr(i32* %b)
ret void
}
declare void @test_char(i8 signext)
declare void @test_chars(i8 signext, i8 signext, i8 signext, i8 signext)
declare void @test_chars_mix(i8 signext, i8 zeroext, i8 zeroext, i8 signext)
declare void @test_int(i32)
declare void @test_ints(i32, i32, i32, i32, i32, i32, i32, i32)
declare void @test_ints_64bit(i32 signext, i32 zeroext, i32 zeroext, i32 signext, i32 signext, i32 signext, i32 signext, i32 signext)
declare void @test_i1(i1)
declare void @test_i64(i64)
declare void @test_int_ptr(i32*)
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