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llvm-mirror/test/CodeGen/ARM/GlobalISel/irtranslator-varargs-lowering.ll
Diana Picus b99810417e [ARM GlobalISel] Allow calls to varargs functions
Allow varargs functions to be called, both in arm and thumb mode. This
boils down to choosing the correct calling convention, which we can
easily test by making sure arm_aapcscc is used instead of
arm_aapcs_vfpcc when the callee is variadic.

llvm-svn: 351424
2019-01-17 10:11:55 +00:00

87 lines
4.7 KiB
LLVM

; RUN: llc -mtriple arm-unknown -mattr=+vfp2,+v6t2 -global-isel -stop-after=irtranslator -verify-machineinstrs %s -o - | FileCheck %s -check-prefix=CHECK -check-prefix=ARM
; RUN: llc -mtriple thumb-unknown -mattr=+vfp2,+v6t2 -global-isel -stop-after=irtranslator -verify-machineinstrs %s -o - | FileCheck %s -check-prefix=CHECK -check-prefix=THUMB
declare arm_aapcscc i32 @int_varargs_target(i32, ...)
define arm_aapcscc i32 @test_call_to_varargs_with_ints(i32 *%a, i32 %b) {
; CHECK-LABEL: name: test_call_to_varargs_with_ints
; CHECK-DAG: [[AVREG:%[0-9]+]]:_(p0) = COPY $r0
; CHECK-DAG: [[BVREG:%[0-9]+]]:_(s32) = COPY $r1
; CHECK: ADJCALLSTACKDOWN 8, 0, 14, $noreg, implicit-def $sp, implicit $sp
; CHECK-DAG: $r0 = COPY [[BVREG]]
; CHECK-DAG: $r1 = COPY [[AVREG]]
; CHECK-DAG: $r2 = COPY [[BVREG]]
; CHECK-DAG: $r3 = COPY [[AVREG]]
; CHECK: [[SP1:%[0-9]+]]:_(p0) = COPY $sp
; CHECK: [[OFF1:%[0-9]+]]:_(s32) = G_CONSTANT i32 0
; CHECK: [[FI1:%[0-9]+]]:_(p0) = G_GEP [[SP1]], [[OFF1]](s32)
; CHECK: G_STORE [[BVREG]](s32), [[FI1]](p0){{.*}}store 4
; CHECK: [[SP2:%[0-9]+]]:_(p0) = COPY $sp
; CHECK: [[OFF2:%[0-9]+]]:_(s32) = G_CONSTANT i32 4
; CHECK: [[FI2:%[0-9]+]]:_(p0) = G_GEP [[SP2]], [[OFF2]](s32)
; CHECK: G_STORE [[AVREG]](p0), [[FI2]](p0){{.*}}store 4
; ARM: BL @int_varargs_target, csr_aapcs, implicit-def $lr, implicit $sp, implicit $r0, implicit $r1, implicit $r2, implicit $r3, implicit-def $r0
; THUMB: tBL 14, $noreg, @int_varargs_target, csr_aapcs, implicit-def $lr, implicit $sp, implicit $r0, implicit $r1, implicit $r2, implicit $r3, implicit-def $r0
; CHECK: [[RVREG:%[0-9]+]]:_(s32) = COPY $r0
; CHECK: ADJCALLSTACKUP 8, 0, 14, $noreg, implicit-def $sp, implicit $sp
; CHECK: $r0 = COPY [[RVREG]]
; ARM: BX_RET 14, $noreg, implicit $r0
; THUMB: tBX_RET 14, $noreg, implicit $r0
entry:
%r = notail call arm_aapcscc i32(i32, ...) @int_varargs_target(i32 %b, i32 *%a, i32 %b, i32 *%a, i32 %b, i32 *%a)
ret i32 %r
}
declare arm_aapcs_vfpcc float @float_varargs_target(float, double, ...)
define arm_aapcs_vfpcc float @test_call_to_varargs_with_floats(float %a, double %b) {
; CHECK-LABEL: name: test_call_to_varargs_with_floats
; CHECK-DAG: [[AVREG:%[0-9]+]]:_(s32) = COPY $s0
; CHECK-DAG: [[BVREG:%[0-9]+]]:_(s64) = COPY $d1
; CHECK: ADJCALLSTACKDOWN 8, 0, 14, $noreg, implicit-def $sp, implicit $sp
; CHECK-DAG: $r0 = COPY [[AVREG]]
; CHECK-DAG: [[B1:%[0-9]+]]:_(s32), [[B2:%[0-9]+]]:_(s32) = G_UNMERGE_VALUES [[BVREG]](s64)
; CHECK-DAG: $r2 = COPY [[B1]]
; CHECK-DAG: $r3 = COPY [[B2]]
; CHECK: [[SP1:%[0-9]+]]:_(p0) = COPY $sp
; CHECK: [[OFF1:%[0-9]+]]:_(s32) = G_CONSTANT i32 0
; CHECK: [[FI1:%[0-9]+]]:_(p0) = G_GEP [[SP1]], [[OFF1]](s32)
; CHECK: G_STORE [[BVREG]](s64), [[FI1]](p0){{.*}}store 8
; ARM: BL @float_varargs_target, csr_aapcs, implicit-def $lr, implicit $sp, implicit $r0, implicit $r2, implicit $r3, implicit-def $r0
; THUMB: tBL 14, $noreg, @float_varargs_target, csr_aapcs, implicit-def $lr, implicit $sp, implicit $r0, implicit $r2, implicit $r3, implicit-def $r0
; CHECK: [[RVREG:%[0-9]+]]:_(s32) = COPY $r0
; CHECK: ADJCALLSTACKUP 8, 0, 14, $noreg, implicit-def $sp, implicit $sp
; CHECK: $s0 = COPY [[RVREG]]
; ARM: BX_RET 14, $noreg, implicit $s0
; THUMB: tBX_RET 14, $noreg, implicit $s0
entry:
%r = notail call arm_aapcs_vfpcc float(float, double, ...) @float_varargs_target(float %a, double %b, double %b)
ret float %r
}
define arm_aapcs_vfpcc float @test_indirect_call_to_varargs(float (float, double, ...) *%fptr, float %a, double %b) {
; CHECK-LABEL: name: test_indirect_call_to_varargs
; CHECK-DAG: [[FPTRVREG:%[0-9]+]]:gpr(p0) = COPY $r0
; CHECK-DAG: [[AVREG:%[0-9]+]]:_(s32) = COPY $s0
; CHECK-DAG: [[BVREG:%[0-9]+]]:_(s64) = COPY $d1
; CHECK: ADJCALLSTACKDOWN 8, 0, 14, $noreg, implicit-def $sp, implicit $sp
; CHECK-DAG: $r0 = COPY [[AVREG]]
; CHECK-DAG: [[B1:%[0-9]+]]:_(s32), [[B2:%[0-9]+]]:_(s32) = G_UNMERGE_VALUES [[BVREG]](s64)
; CHECK-DAG: $r2 = COPY [[B1]]
; CHECK-DAG: $r3 = COPY [[B2]]
; CHECK: [[SP1:%[0-9]+]]:_(p0) = COPY $sp
; CHECK: [[OFF1:%[0-9]+]]:_(s32) = G_CONSTANT i32 0
; CHECK: [[FI1:%[0-9]+]]:_(p0) = G_GEP [[SP1]], [[OFF1]](s32)
; CHECK: G_STORE [[BVREG]](s64), [[FI1]](p0){{.*}}store 8
; ARM: BLX [[FPTRVREG]](p0), csr_aapcs, implicit-def $lr, implicit $sp, implicit $r0, implicit $r2, implicit $r3, implicit-def $r0
; THUMB: tBLXr 14, $noreg, [[FPTRVREG]](p0), csr_aapcs, implicit-def $lr, implicit $sp, implicit $r0, implicit $r2, implicit $r3, implicit-def $r0
; CHECK: [[RVREG:%[0-9]+]]:_(s32) = COPY $r0
; CHECK: ADJCALLSTACKUP 8, 0, 14, $noreg, implicit-def $sp, implicit $sp
; CHECK: $s0 = COPY [[RVREG]]
; ARM: BX_RET 14, $noreg, implicit $s0
; THUMB: tBX_RET 14, $noreg, implicit $s0
entry:
%r = notail call arm_aapcs_vfpcc float(float, double, ...) %fptr(float %a, double %b, double %b)
ret float %r
}