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llvm-project/llvm/test/CodeGen/Mips/tailcall/tailcall.ll
Simon Dardis 1dcb911061 [mips] Restrict tail call optimization 
The tail call optimization was being used without proper consideration of
ABI requirements for saving and restoring the GP. This patch restricts tail
call optimization to functions within the same translation unit.

Reviewers: vkalintiris

Differential Revision: https://reviews.llvm.org/D24763

llvm-svn: 287505
2016-11-20 21:23:08 +00:00

303 lines
8.0 KiB
LLVM
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; RUN: llc -march=mipsel -relocation-model=pic \
; RUN: -verify-machineinstrs -mips-tail-calls=1 < %s | FileCheck %s -check-prefixes=ALL,PIC32
; RUN: llc -march=mipsel -relocation-model=static \
; RUN: -verify-machineinstrs -mips-tail-calls=1 < %s | FileCheck %s -check-prefixes=ALL,STATIC32
; RUN: llc -march=mips64el -mcpu=mips64r2 \
; RUN: -verify-machineinstrs -mips-tail-calls=1 < %s | FileCheck %s -check-prefixes=ALL,N64
; RUN: llc -march=mipsel -mattr=mips16 -relocation-model=pic \
; RUN: -verify-machineinstrs -mips-tail-calls=1 < %s | \
; RUN: FileCheck %s -check-prefixes=ALL,PIC16
; RUN: llc -march=mipsel -relocation-model=pic -mattr=+micromips -mips-tail-calls=1 < %s | \
; RUN: FileCheck %s -check-prefixes=ALL,PIC32MM
; RUN: llc -march=mipsel -relocation-model=static -mattr=+micromips \
; RUN: -mips-tail-calls=1 < %s | FileCheck %s -check-prefixes=ALL,STATIC32
; RUN: llc -march=mipsel -relocation-model=pic -mcpu=mips32r6 -mips-tail-calls=1 < %s | \
; RUN: FileCheck %s -check-prefixes=ALL,PIC32R6
; RUN: llc -march=mipsel -relocation-model=static -mcpu=mips32r6 \
; RUN: -mips-tail-calls=1 < %s | FileCheck %s -check-prefixes=ALL,STATIC32
; RUN: llc -march=mips64el -mcpu=mips64r6 \
; RUN: -mips-tail-calls=1 < %s | FileCheck %s -check-prefixes=ALL,N64R6
; RUN: llc -march=mipsel -relocation-model=pic -mcpu=mips32r6 -mattr=+micromips \
; RUN: -mips-tail-calls=1 < %s | FileCheck %s -check-prefixes=ALL,PIC32MM
; RUN: llc -march=mipsel -relocation-model=static -mcpu=mips32r6 \
; RUN: -mattr=+micromips -mips-tail-calls=1 < %s | FileCheck %s -check-prefixes=ALL,STATIC32
; RUN: llc -march=mips64el -mcpu=mips64r6 -mattr=+micromips -mips-tail-calls=1 < %s \
; RUN: | FileCheck %s -check-prefixes=ALL,N64
@g0 = common global i32 0, align 4
@g1 = common global i32 0, align 4
@g2 = common global i32 0, align 4
@g3 = common global i32 0, align 4
@g4 = common global i32 0, align 4
@g5 = common global i32 0, align 4
@g6 = common global i32 0, align 4
@g7 = common global i32 0, align 4
@g8 = common global i32 0, align 4
@g9 = common global i32 0, align 4
define i32 @caller1(i32 %a0) nounwind {
entry:
; ALL-LABEL: caller1:
; PIC32: jalr $25
; PIC32MM: jalr $25
; PIC32R6: jalr $25
; STATIC32: jal
; N64: jalr $25
; N64R6: jalr $25
; PIC16: jalrc
%call = tail call i32 @callee1(i32 1, i32 1, i32 1, i32 %a0) nounwind
ret i32 %call
}
declare i32 @callee1(i32, i32, i32, i32)
define i32 @caller2(i32 %a0, i32 %a1, i32 %a2, i32 %a3) nounwind {
entry:
; ALL-LABEL: caller2
; PIC32: jalr $25
; PIC32MM: jalr $25
; PIC32R6: jalr $25
; STATIC32: jal
; N64: jalr $25
; N64R6: jalr $25
; PIC16: jalrc
%call = tail call i32 @callee2(i32 1, i32 %a0, i32 %a1, i32 %a2, i32 %a3) nounwind
ret i32 %call
}
declare i32 @callee2(i32, i32, i32, i32, i32)
define i32 @caller3(i32 %a0, i32 %a1, i32 %a2, i32 %a3, i32 %a4) nounwind {
entry:
; ALL-LABEL: caller3:
; PIC32: jalr $25
; PIC32R6: jalr $25
; PIC32MM: jalr $25
; STATIC32: jal
; N64: jalr $25
; N64R6: jalr $25
; PIC16: jalrc
%call = tail call i32 @callee3(i32 1, i32 1, i32 1, i32 %a0, i32 %a1, i32 %a2, i32 %a3, i32 %a4) nounwind
ret i32 %call
}
declare i32 @callee3(i32, i32, i32, i32, i32, i32, i32, i32)
define i32 @caller4(i32 %a0, i32 %a1, i32 %a2, i32 %a3, i32 %a4, i32 %a5, i32 %a6, i32 %a7) nounwind {
entry:
; ALL-LABEL: caller4:
; PIC32: jalr $25
; PIC32R6: jalr $25
; PIC32MM: jalr $25
; STATIC32: jal
; N64: jalr $25
; N64R6: jalr $25
; PIC16: jalrc
%call = tail call i32 @callee4(i32 1, i32 %a0, i32 %a1, i32 %a2, i32 %a3, i32 %a4, i32 %a5, i32 %a6, i32 %a7) nounwind
ret i32 %call
}
declare i32 @callee4(i32, i32, i32, i32, i32, i32, i32, i32, i32)
define i32 @caller5() nounwind readonly {
entry:
; ALL-LABEL: caller5:
; PIC32: jr $25
; PIC32R6: jr $25
; PIC32MM: jr
; STATIC32: j
; N64: jr $25
; N64R6: jr $25
; PIC16: jalrc
%0 = load i32, i32* @g0, align 4
%1 = load i32, i32* @g1, align 4
%2 = load i32, i32* @g2, align 4
%3 = load i32, i32* @g3, align 4
%4 = load i32, i32* @g4, align 4
%5 = load i32, i32* @g5, align 4
%6 = load i32, i32* @g6, align 4
%7 = load i32, i32* @g7, align 4
%8 = load i32, i32* @g8, align 4
%9 = load i32, i32* @g9, align 4
%call = tail call fastcc i32 @callee5(i32 %0, i32 %1, i32 %2, i32 %3, i32 %4, i32 %5, i32 %6, i32 %7, i32 %8, i32 %9)
ret i32 %call
}
define internal fastcc i32 @callee5(i32 %a0, i32 %a1, i32 %a2, i32 %a3, i32 %a4, i32 %a5, i32 %a6, i32 %a7, i32 %a8, i32 %a9) nounwind readnone noinline {
entry:
%add = add nsw i32 %a1, %a0
%add1 = add nsw i32 %add, %a2
%add2 = add nsw i32 %add1, %a3
%add3 = add nsw i32 %add2, %a4
%add4 = add nsw i32 %add3, %a5
%add5 = add nsw i32 %add4, %a6
%add6 = add nsw i32 %add5, %a7
%add7 = add nsw i32 %add6, %a8
%add8 = add nsw i32 %add7, %a9
ret i32 %add8
}
declare i32 @callee8(i32, ...)
define i32 @caller8_0() nounwind {
entry:
; ALL-LABEL: caller8_0:
; PIC32: jr $25
; PIC32R6: jrc $25
; PIC32MM: jrc
; STATIC32: j
; N64: jr $25
; N64R6: jrc $25
; PIC16: jalrc
%call = tail call fastcc i32 @caller8_1()
ret i32 %call
}
define internal fastcc i32 @caller8_1() nounwind noinline {
entry:
; ALL-LABEL: caller8_1:
; PIC32: jalr $25
; PIC32R6: jalr $25
; PIC32MM: jalr $25
; STATIC32: jal
; N64: jalr $25
; N64R6: jalr $25
; PIC16: jalrc
%call = tail call i32 (i32, ...) @callee8(i32 2, i32 1) nounwind
ret i32 %call
}
%struct.S = type { [2 x i32] }
@gs1 = external global %struct.S
declare i32 @callee9(%struct.S* byval)
define i32 @caller9_0() nounwind {
entry:
; ALL-LABEL: caller9_0:
; PIC32: jr $25
; PIC32R6: jrc $25
; PIC32MM: jrc
; STATIC32: j
; N64: jr $25
; N64R6: jrc $25
; PIC16: jalrc
%call = tail call fastcc i32 @caller9_1()
ret i32 %call
}
define internal fastcc i32 @caller9_1() nounwind noinline {
entry:
; ALL-LABEL: caller9_1:
; PIC32: jalr $25
; PIC32R6: jalrc $25
; PIC32MM: jalr $25
; STATIC32: jal
; N64: jalr $25
; N64R6: jalrc $25
; PIC16: jalrc
%call = tail call i32 @callee9(%struct.S* byval @gs1) nounwind
ret i32 %call
}
declare i32 @callee10(i32, i32, i32, i32, i32, i32, i32, i32, i32)
define i32 @caller10(i32 %a0, i32 %a1, i32 %a2, i32 %a3, i32 %a4, i32 %a5, i32 %a6, i32 %a7, i32 %a8) nounwind {
entry:
; ALL-LABEL: caller10:
; PIC32: jalr $25
; PIC32R6: jalr $25
; PIC32MM: jalr $25
; STATIC32: jal
; N64: jalr $25
; N64R6: jalr $25
; PIC16: jalrc
%call = tail call i32 @callee10(i32 %a8, i32 %a0, i32 %a1, i32 %a2, i32 %a3, i32 %a4, i32 %a5, i32 %a6, i32 %a7) nounwind
ret i32 %call
}
declare i32 @callee11(%struct.S* byval)
define i32 @caller11() nounwind noinline {
entry:
; ALL-LABEL: caller11:
; PIC32: jalr $25
; PIC32R6: jalrc $25
; PIC32MM: jalr $25
; STATIC32: jal
; N64: jalr $25
; N64R6: jalrc $25
; PIC16: jalrc
%call = tail call i32 @callee11(%struct.S* byval @gs1) nounwind
ret i32 %call
}
declare i32 @callee12()
declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture, i8* nocapture, i32, i32, i1) nounwind
define i32 @caller12(%struct.S* nocapture byval %a0) nounwind {
entry:
; ALL-LABEL: caller12:
; PIC32: jalr $25
; PIC32R6: jalrc $25
; PIC32MM: jalr $25
; STATIC32: jal
; N64: jalr $25
; N64R6: jalrc $25
; PIC16: jalrc
%0 = bitcast %struct.S* %a0 to i8*
tail call void @llvm.memcpy.p0i8.p0i8.i32(i8* bitcast (%struct.S* @gs1 to i8*), i8* %0, i32 8, i32 4, i1 false)
%call = tail call i32 @callee12() nounwind
ret i32 %call
}
declare i32 @callee13(i32, ...)
define i32 @caller13() nounwind {
entry:
; ALL-LABEL: caller13
; PIC32: jalr $25
; PIC32R6: jalr $25
; PIC32MM: jalr $25
; STATIC32: jal
; N64: jalr $25
; N64R6: jalr $25
; PIC16: jalrc
%call = tail call i32 (i32, ...) @callee13(i32 1, i32 2) nounwind
ret i32 %call
}
; Check that there is a chain edge between the load and store nodes.
;
; ALL-LABEL: caller14:
; PIC32: lw ${{[0-9]+}}, 48($sp)
; PIC32: sw $4, 16($sp)
; PIC32MM: lw ${{[0-9]+}}, 48($sp)
; PIC32MM: sw16 $4, 16(${{[0-9]+}})
define void @caller14(i32 %a, i32 %b, i32 %c, i32 %d, i32 %e) {
entry:
tail call void @callee14(i32 %e, i32 %b, i32 %c, i32 %d, i32 %a)
ret void
}
declare void @callee14(i32, i32, i32, i32, i32)
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