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clang-p2996/llvm/test/CodeGen/Mips/fastcc.ll
Simon Dardis 57f4ae4625 [mips] Enable tail calls by default 
Enable tail calls by default for (micro)MIPS(64).

microMIPS is slightly more tricky than doing it for MIPS(R6) or microMIPSR6.
microMIPS has two instruction encodings: 16bit and 32bit along with some
restrictions on the size of the instruction that can fill the delay slot.
For safe tail calls for microMIPS, the delay slot filler attempts to find
a correct size instruction for the delay slot of TAILCALL pseudos.

Reviewers: dsanders, vkalintris

Subscribers: jfb, dsanders, sdardis, llvm-commits

Differential Revision: https://reviews.llvm.org/D21138

llvm-svn: 277708
2016-08-04 09:17:07 +00:00

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; RUN: llc < %s -march=mipsel -relocation-model=pic | FileCheck %s
; RUN: llc < %s -mtriple=mipsel-none-nacl-gnu -relocation-model=pic \
; RUN: | FileCheck %s -check-prefix=CHECK-NACL
; RUN: llc < %s -march=mipsel -mcpu=mips32 -mattr=+nooddspreg -relocation-model=pic | FileCheck %s -check-prefix=NOODDSPREG
; RUN: llc < %s -march=mipsel -mcpu=mips32r2 -mattr=+fp64,+nooddspreg -relocation-model=pic | FileCheck %s -check-prefix=FP64-NOODDSPREG
@gi0 = external global i32
@gi1 = external global i32
@gi2 = external global i32
@gi3 = external global i32
@gi4 = external global i32
@gi5 = external global i32
@gi6 = external global i32
@gi7 = external global i32
@gi8 = external global i32
@gi9 = external global i32
@gi10 = external global i32
@gi11 = external global i32
@gi12 = external global i32
@gi13 = external global i32
@gi14 = external global i32
@gi15 = external global i32
@gi16 = external global i32
@gfa0 = external global float
@gfa1 = external global float
@gfa2 = external global float
@gfa3 = external global float
@gfa4 = external global float
@gfa5 = external global float
@gfa6 = external global float
@gfa7 = external global float
@gfa8 = external global float
@gfa9 = external global float
@gfa10 = external global float
@gfa11 = external global float
@gfa12 = external global float
@gfa13 = external global float
@gfa14 = external global float
@gfa15 = external global float
@gfa16 = external global float
@gfa17 = external global float
@gfa18 = external global float
@gfa19 = external global float
@gfa20 = external global float
@gf0 = external global float
@gf1 = external global float
@gf2 = external global float
@gf3 = external global float
@gf4 = external global float
@gf5 = external global float
@gf6 = external global float
@gf7 = external global float
@gf8 = external global float
@gf9 = external global float
@gf10 = external global float
@gf11 = external global float
@gf12 = external global float
@gf13 = external global float
@gf14 = external global float
@gf15 = external global float
@gf16 = external global float
@gf17 = external global float
@gf18 = external global float
@gf19 = external global float
@gf20 = external global float
@g0 = external global i32
@g1 = external global i32
@g2 = external global i32
@g3 = external global i32
@g4 = external global i32
@g5 = external global i32
@g6 = external global i32
@g7 = external global i32
@g8 = external global i32
@g9 = external global i32
@g10 = external global i32
@g11 = external global i32
@g12 = external global i32
@g13 = external global i32
@g14 = external global i32
@g15 = external global i32
@g16 = external global i32
@fa = common global [11 x float] zeroinitializer, align 4
@da = common global [11 x double] zeroinitializer, align 8
define void @caller0() nounwind {
entry:
; CHECK: caller0
; CHECK: lw $3
; CHECK: lw $24
; CHECK: lw $15
; CHECK: lw $14
; CHECK: lw $13
; CHECK: lw $12
; CHECK: lw $11
; CHECK: lw $10
; CHECK: lw $9
; CHECK: lw $8
; CHECK: lw $7
; CHECK: lw $6
; CHECK: lw $5
; CHECK: lw $4
; t6, t7 and t8 are reserved in NaCl and cannot be used for fastcc.
; CHECK-NACL-NOT: lw $14
; CHECK-NACL-NOT: lw $15
; CHECK-NACL-NOT: lw $24
%0 = load i32, i32* @gi0, align 4
%1 = load i32, i32* @gi1, align 4
%2 = load i32, i32* @gi2, align 4
%3 = load i32, i32* @gi3, align 4
%4 = load i32, i32* @gi4, align 4
%5 = load i32, i32* @gi5, align 4
%6 = load i32, i32* @gi6, align 4
%7 = load i32, i32* @gi7, align 4
%8 = load i32, i32* @gi8, align 4
%9 = load i32, i32* @gi9, align 4
%10 = load i32, i32* @gi10, align 4
%11 = load i32, i32* @gi11, align 4
%12 = load i32, i32* @gi12, align 4
%13 = load i32, i32* @gi13, align 4
%14 = load i32, i32* @gi14, align 4
%15 = load i32, i32* @gi15, align 4
%16 = load i32, i32* @gi16, align 4
tail call fastcc void @callee0(i32 %0, i32 %1, i32 %2, i32 %3, i32 %4, i32 %5, i32 %6, i32 %7, i32 %8, i32 %9, i32 %10, i32 %11, i32 %12, i32 %13, i32 %14, i32 %15, i32 %16)
ret void
}
define internal fastcc void @callee0(i32 %a0, i32 %a1, i32 %a2, i32 %a3, i32 %a4, i32 %a5, i32 %a6, i32 %a7, i32 %a8, i32 %a9, i32 %a10, i32 %a11, i32 %a12, i32 %a13, i32 %a14, i32 %a15, i32 %a16) nounwind noinline {
entry:
; CHECK: callee0
; CHECK: sw $4
; CHECK: sw $5
; CHECK: sw $6
; CHECK: sw $7
; CHECK: sw $8
; CHECK: sw $9
; CHECK: sw $10
; CHECK: sw $11
; CHECK: sw $12
; CHECK: sw $13
; CHECK: sw $14
; CHECK: sw $15
; CHECK: sw $24
; CHECK: sw $3
; t6, t7 and t8 are reserved in NaCl and cannot be used for fastcc.
; CHECK-NACL-NOT: sw $14
; CHECK-NACL-NOT: sw $15
; CHECK-NACL-NOT: sw $24
store i32 %a0, i32* @g0, align 4
store i32 %a1, i32* @g1, align 4
store i32 %a2, i32* @g2, align 4
store i32 %a3, i32* @g3, align 4
store i32 %a4, i32* @g4, align 4
store i32 %a5, i32* @g5, align 4
store i32 %a6, i32* @g6, align 4
store i32 %a7, i32* @g7, align 4
store i32 %a8, i32* @g8, align 4
store i32 %a9, i32* @g9, align 4
store i32 %a10, i32* @g10, align 4
store i32 %a11, i32* @g11, align 4
store i32 %a12, i32* @g12, align 4
store i32 %a13, i32* @g13, align 4
store i32 %a14, i32* @g14, align 4
store i32 %a15, i32* @g15, align 4
store i32 %a16, i32* @g16, align 4
ret void
}
define void @caller1(float %a0, float %a1, float %a2, float %a3, float %a4, float %a5, float %a6, float %a7, float %a8, float %a9, float %a10, float %a11, float %a12, float %a13, float %a14, float %a15, float %a16, float %a17, float %a18, float %a19, float %a20) nounwind {
entry:
; CHECK: caller1
; CHECK: lwc1 $f19
; CHECK: lwc1 $f18
; CHECK: lwc1 $f17
; CHECK: lwc1 $f16
; CHECK: lwc1 $f15
; CHECK: lwc1 $f14
; CHECK: lwc1 $f13
; CHECK: lwc1 $f12
; CHECK: lwc1 $f11
; CHECK: lwc1 $f10
; CHECK: lwc1 $f9
; CHECK: lwc1 $f8
; CHECK: lwc1 $f7
; CHECK: lwc1 $f6
; CHECK: lwc1 $f5
; CHECK: lwc1 $f4
; CHECK: lwc1 $f3
; CHECK: lwc1 $f2
; CHECK: lwc1 $f1
; CHECK: lwc1 $f0
%0 = load float, float* @gfa0, align 4
%1 = load float, float* @gfa1, align 4
%2 = load float, float* @gfa2, align 4
%3 = load float, float* @gfa3, align 4
%4 = load float, float* @gfa4, align 4
%5 = load float, float* @gfa5, align 4
%6 = load float, float* @gfa6, align 4
%7 = load float, float* @gfa7, align 4
%8 = load float, float* @gfa8, align 4
%9 = load float, float* @gfa9, align 4
%10 = load float, float* @gfa10, align 4
%11 = load float, float* @gfa11, align 4
%12 = load float, float* @gfa12, align 4
%13 = load float, float* @gfa13, align 4
%14 = load float, float* @gfa14, align 4
%15 = load float, float* @gfa15, align 4
%16 = load float, float* @gfa16, align 4
%17 = load float, float* @gfa17, align 4
%18 = load float, float* @gfa18, align 4
%19 = load float, float* @gfa19, align 4
%20 = load float, float* @gfa20, align 4
tail call fastcc void @callee1(float %0, float %1, float %2, float %3, float %4, float %5, float %6, float %7, float %8, float %9, float %10, float %11, float %12, float %13, float %14, float %15, float %16, float %17, float %18, float %19, float %20)
ret void
}
define internal fastcc void @callee1(float %a0, float %a1, float %a2, float %a3, float %a4, float %a5, float %a6, float %a7, float %a8, float %a9, float %a10, float %a11, float %a12, float %a13, float %a14, float %a15, float %a16, float %a17, float %a18, float %a19, float %a20) nounwind noinline {
entry:
; CHECK: callee1
; CHECK: swc1 $f0
; CHECK: swc1 $f1
; CHECK: swc1 $f2
; CHECK: swc1 $f3
; CHECK: swc1 $f4
; CHECK: swc1 $f5
; CHECK: swc1 $f6
; CHECK: swc1 $f7
; CHECK: swc1 $f8
; CHECK: swc1 $f9
; CHECK: swc1 $f10
; CHECK: swc1 $f11
; CHECK: swc1 $f12
; CHECK: swc1 $f13
; CHECK: swc1 $f14
; CHECK: swc1 $f15
; CHECK: swc1 $f16
; CHECK: swc1 $f17
; CHECK: swc1 $f18
; CHECK: swc1 $f19
store float %a0, float* @gf0, align 4
store float %a1, float* @gf1, align 4
store float %a2, float* @gf2, align 4
store float %a3, float* @gf3, align 4
store float %a4, float* @gf4, align 4
store float %a5, float* @gf5, align 4
store float %a6, float* @gf6, align 4
store float %a7, float* @gf7, align 4
store float %a8, float* @gf8, align 4
store float %a9, float* @gf9, align 4
store float %a10, float* @gf10, align 4
store float %a11, float* @gf11, align 4
store float %a12, float* @gf12, align 4
store float %a13, float* @gf13, align 4
store float %a14, float* @gf14, align 4
store float %a15, float* @gf15, align 4
store float %a16, float* @gf16, align 4
store float %a17, float* @gf17, align 4
store float %a18, float* @gf18, align 4
store float %a19, float* @gf19, align 4
store float %a20, float* @gf20, align 4
ret void
}
define void @caller2() {
entry:
; NOODDSPREG-LABEL: caller2:
; Check that first 10 arguments are passed in even float registers
; f0, f2, ... , f18. Check that 11th argument is passed on stack.
; NOODDSPREG-DAG: lw $[[R0:[0-9]+]], %got(fa)(${{[0-9]+|gp}})
; NOODDSPREG-DAG: lwc1 $f0, 0($[[R0]])
; NOODDSPREG-DAG: lwc1 $f2, 4($[[R0]])
; NOODDSPREG-DAG: lwc1 $f4, 8($[[R0]])
; NOODDSPREG-DAG: lwc1 $f6, 12($[[R0]])
; NOODDSPREG-DAG: lwc1 $f8, 16($[[R0]])
; NOODDSPREG-DAG: lwc1 $f10, 20($[[R0]])
; NOODDSPREG-DAG: lwc1 $f12, 24($[[R0]])
; NOODDSPREG-DAG: lwc1 $f14, 28($[[R0]])
; NOODDSPREG-DAG: lwc1 $f16, 32($[[R0]])
; NOODDSPREG-DAG: lwc1 $f18, 36($[[R0]])
; NOODDSPREG-DAG: lwc1 $[[F0:f[0-9]*[02468]]], 40($[[R0]])
; NOODDSPREG-DAG: swc1 $[[F0]], 8($sp)
%0 = load float, float* getelementptr ([11 x float], [11 x float]* @fa, i32 0, i32 0), align 4
%1 = load float, float* getelementptr ([11 x float], [11 x float]* @fa, i32 0, i32 1), align 4
%2 = load float, float* getelementptr ([11 x float], [11 x float]* @fa, i32 0, i32 2), align 4
%3 = load float, float* getelementptr ([11 x float], [11 x float]* @fa, i32 0, i32 3), align 4
%4 = load float, float* getelementptr ([11 x float], [11 x float]* @fa, i32 0, i32 4), align 4
%5 = load float, float* getelementptr ([11 x float], [11 x float]* @fa, i32 0, i32 5), align 4
%6 = load float, float* getelementptr ([11 x float], [11 x float]* @fa, i32 0, i32 6), align 4
%7 = load float, float* getelementptr ([11 x float], [11 x float]* @fa, i32 0, i32 7), align 4
%8 = load float, float* getelementptr ([11 x float], [11 x float]* @fa, i32 0, i32 8), align 4
%9 = load float, float* getelementptr ([11 x float], [11 x float]* @fa, i32 0, i32 9), align 4
%10 = load float, float* getelementptr ([11 x float], [11 x float]* @fa, i32 0, i32 10), align 4
tail call fastcc void @callee2(float %0, float %1, float %2, float %3,
float %4, float %5, float %6, float %7,
float %8, float %9, float %10)
ret void
}
define fastcc void @callee2(float %a0, float %a1, float %a2, float %a3,
float %a4, float %a5, float %a6, float %a7,
float %a8, float %a9, float %a10) {
entry:
; NOODDSPREG-LABEL: callee2:
; NOODDSPREG: addiu $sp, $sp, -[[OFFSET:[0-9]+]]
; Check that first 10 arguments are received in even float registers
; f0, f2, ... , f18. Check that 11th argument is received on stack.
; NOODDSPREG-DAG: lw $[[R0:[0-9]+]], %got(fa)(${{[0-9]+|gp}})
; NOODDSPREG-DAG: swc1 $f0, 0($[[R0]])
; NOODDSPREG-DAG: swc1 $f2, 4($[[R0]])
; NOODDSPREG-DAG: swc1 $f4, 8($[[R0]])
; NOODDSPREG-DAG: swc1 $f6, 12($[[R0]])
; NOODDSPREG-DAG: swc1 $f8, 16($[[R0]])
; NOODDSPREG-DAG: swc1 $f10, 20($[[R0]])
; NOODDSPREG-DAG: swc1 $f12, 24($[[R0]])
; NOODDSPREG-DAG: swc1 $f14, 28($[[R0]])
; NOODDSPREG-DAG: swc1 $f16, 32($[[R0]])
; NOODDSPREG-DAG: swc1 $f18, 36($[[R0]])
; NOODDSPREG-DAG: lwc1 $[[F0:f[0-9]*[02468]]], [[OFFSET]]($sp)
; NOODDSPREG-DAG: swc1 $[[F0]], 40($[[R0]])
store float %a0, float* getelementptr ([11 x float], [11 x float]* @fa, i32 0, i32 0), align 4
store float %a1, float* getelementptr ([11 x float], [11 x float]* @fa, i32 0, i32 1), align 4
store float %a2, float* getelementptr ([11 x float], [11 x float]* @fa, i32 0, i32 2), align 4
store float %a3, float* getelementptr ([11 x float], [11 x float]* @fa, i32 0, i32 3), align 4
store float %a4, float* getelementptr ([11 x float], [11 x float]* @fa, i32 0, i32 4), align 4
store float %a5, float* getelementptr ([11 x float], [11 x float]* @fa, i32 0, i32 5), align 4
store float %a6, float* getelementptr ([11 x float], [11 x float]* @fa, i32 0, i32 6), align 4
store float %a7, float* getelementptr ([11 x float], [11 x float]* @fa, i32 0, i32 7), align 4
store float %a8, float* getelementptr ([11 x float], [11 x float]* @fa, i32 0, i32 8), align 4
store float %a9, float* getelementptr ([11 x float], [11 x float]* @fa, i32 0, i32 9), align 4
store float %a10, float* getelementptr ([11 x float], [11 x float]* @fa, i32 0, i32 10), align 4
ret void
}
define void @caller3() {
entry:
; FP64-NOODDSPREG-LABEL: caller3:
; Check that first 10 arguments are passed in even float registers
; f0, f2, ... , f18. Check that 11th argument is passed on stack.
; FP64-NOODDSPREG-DAG: lw $[[R0:[0-9]+]], %got(da)(${{[0-9]+|gp}})
; FP64-NOODDSPREG-DAG: ldc1 $f0, 0($[[R0]])
; FP64-NOODDSPREG-DAG: ldc1 $f2, 8($[[R0]])
; FP64-NOODDSPREG-DAG: ldc1 $f4, 16($[[R0]])
; FP64-NOODDSPREG-DAG: ldc1 $f6, 24($[[R0]])
; FP64-NOODDSPREG-DAG: ldc1 $f8, 32($[[R0]])
; FP64-NOODDSPREG-DAG: ldc1 $f10, 40($[[R0]])
; FP64-NOODDSPREG-DAG: ldc1 $f12, 48($[[R0]])
; FP64-NOODDSPREG-DAG: ldc1 $f14, 56($[[R0]])
; FP64-NOODDSPREG-DAG: ldc1 $f16, 64($[[R0]])
; FP64-NOODDSPREG-DAG: ldc1 $f18, 72($[[R0]])
; FP64-NOODDSPREG-DAG: ldc1 $[[F0:f[0-9]*[02468]]], 80($[[R0]])
; FP64-NOODDSPREG-DAG: sdc1 $[[F0]], 0($sp)
%0 = load double, double* getelementptr ([11 x double], [11 x double]* @da, i32 0, i32 0), align 8
%1 = load double, double* getelementptr ([11 x double], [11 x double]* @da, i32 0, i32 1), align 8
%2 = load double, double* getelementptr ([11 x double], [11 x double]* @da, i32 0, i32 2), align 8
%3 = load double, double* getelementptr ([11 x double], [11 x double]* @da, i32 0, i32 3), align 8
%4 = load double, double* getelementptr ([11 x double], [11 x double]* @da, i32 0, i32 4), align 8
%5 = load double, double* getelementptr ([11 x double], [11 x double]* @da, i32 0, i32 5), align 8
%6 = load double, double* getelementptr ([11 x double], [11 x double]* @da, i32 0, i32 6), align 8
%7 = load double, double* getelementptr ([11 x double], [11 x double]* @da, i32 0, i32 7), align 8
%8 = load double, double* getelementptr ([11 x double], [11 x double]* @da, i32 0, i32 8), align 8
%9 = load double, double* getelementptr ([11 x double], [11 x double]* @da, i32 0, i32 9), align 8
%10 = load double, double* getelementptr ([11 x double], [11 x double]* @da, i32 0, i32 10), align 8
tail call fastcc void @callee3(double %0, double %1, double %2, double %3,
double %4, double %5, double %6, double %7,
double %8, double %9, double %10)
ret void
}
define fastcc void @callee3(double %a0, double %a1, double %a2, double %a3,
double %a4, double %a5, double %a6, double %a7,
double %a8, double %a9, double %a10) {
entry:
; FP64-NOODDSPREG-LABEL: callee3:
; FP64-NOODDSPREG: addiu $sp, $sp, -[[OFFSET:[0-9]+]]
; Check that first 10 arguments are received in even float registers
; f0, f2, ... , f18. Check that 11th argument is received on stack.
; FP64-NOODDSPREG-DAG: lw $[[R0:[0-9]+]], %got(da)(${{[0-9]+|gp}})
; FP64-NOODDSPREG-DAG: sdc1 $f0, 0($[[R0]])
; FP64-NOODDSPREG-DAG: sdc1 $f2, 8($[[R0]])
; FP64-NOODDSPREG-DAG: sdc1 $f4, 16($[[R0]])
; FP64-NOODDSPREG-DAG: sdc1 $f6, 24($[[R0]])
; FP64-NOODDSPREG-DAG: sdc1 $f8, 32($[[R0]])
; FP64-NOODDSPREG-DAG: sdc1 $f10, 40($[[R0]])
; FP64-NOODDSPREG-DAG: sdc1 $f12, 48($[[R0]])
; FP64-NOODDSPREG-DAG: sdc1 $f14, 56($[[R0]])
; FP64-NOODDSPREG-DAG: sdc1 $f16, 64($[[R0]])
; FP64-NOODDSPREG-DAG: sdc1 $f18, 72($[[R0]])
; FP64-NOODDSPREG-DAG: ldc1 $[[F0:f[0-9]*[02468]]], [[OFFSET]]($sp)
; FP64-NOODDSPREG-DAG: sdc1 $[[F0]], 80($[[R0]])
store double %a0, double* getelementptr ([11 x double], [11 x double]* @da, i32 0, i32 0), align 8
store double %a1, double* getelementptr ([11 x double], [11 x double]* @da, i32 0, i32 1), align 8
store double %a2, double* getelementptr ([11 x double], [11 x double]* @da, i32 0, i32 2), align 8
store double %a3, double* getelementptr ([11 x double], [11 x double]* @da, i32 0, i32 3), align 8
store double %a4, double* getelementptr ([11 x double], [11 x double]* @da, i32 0, i32 4), align 8
store double %a5, double* getelementptr ([11 x double], [11 x double]* @da, i32 0, i32 5), align 8
store double %a6, double* getelementptr ([11 x double], [11 x double]* @da, i32 0, i32 6), align 8
store double %a7, double* getelementptr ([11 x double], [11 x double]* @da, i32 0, i32 7), align 8
store double %a8, double* getelementptr ([11 x double], [11 x double]* @da, i32 0, i32 8), align 8
store double %a9, double* getelementptr ([11 x double], [11 x double]* @da, i32 0, i32 9), align 8
store double %a10, double* getelementptr ([11 x double], [11 x double]* @da, i32 0, i32 10), align 8
ret void
}
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