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llvm-project/llvm/test/CodeGen/ARM/GlobalISel/arm-unsupported.ll

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[ARM] GlobalISel: Select simple G_GLOBAL_VALUE instructions Add support in the instruction selector for G_GLOBAL_VALUE for ELF and MachO for the static relocation model. We don't handle Windows yet because that's Thumb-only, and we don't handle Thumb in general at the moment. Support for PIC, ROPI, RWPI and TLS will be added in subsequent commits. Differential Revision: https://reviews.llvm.org/D35883 llvm-svn: 309927
2017-08-03 17:14:59 +08:00
; RUN: llc -mtriple arm-unknown -verify-machineinstrs -global-isel -global-isel-abort=2 -pass-remarks-missed='gisel*' %s -o - 2>&1 | FileCheck %s -check-prefixes=CHECK
; RUN: llc -mtriple arm-unknown -verify-machineinstrs -global-isel -global-isel-abort=2 -pass-remarks-missed='gisel*' -relocation-model=pic %s -o - 2>&1 | FileCheck %s -check-prefixes=PIC
; RUN: llc -mtriple arm-unknown -verify-machineinstrs -global-isel -global-isel-abort=2 -pass-remarks-missed='gisel*' -relocation-model=ropi %s -o - 2>&1 | FileCheck %s -check-prefixes=ROPI
; RUN: llc -mtriple arm-unknown -verify-machineinstrs -global-isel -global-isel-abort=2 -pass-remarks-missed='gisel*' -relocation-model=rwpi %s -o - 2>&1 | FileCheck %s -check-prefixes=RWPI
; RUN: llc -mtriple arm-unknown -verify-machineinstrs -global-isel -global-isel-abort=2 -pass-remarks-missed='gisel*' -relocation-model=ropi-rwpi %s -o - 2>&1 | FileCheck %s -check-prefixes=ROPI-RWPI
[ARM] GlobalISel: Make struct arguments fail elegantly The condition in isSupportedType didn't handle struct/array arguments properly. Fix the check and add a test to make sure we use the fallback path in this kind of situation. The test deals with some common cases where the call lowering should error out. There are still some issues here that need to be addressed (tail calls come to mind), but they can be addressed in other patches. llvm-svn: 300967
2017-04-21 19:53:01 +08:00
; This file checks that we use the fallback path for things that are known to
; be unsupported on the ARM target. It should progressively shrink in size.
define <4 x i32> @test_int_vectors(<4 x i32> %a, <4 x i32> %b) {
; CHECK: remark: {{.*}} unable to lower arguments: <4 x i32> (<4 x i32>, <4 x i32>)*
; CHECK-LABEL: warning: Instruction selection used fallback path for test_int_vectors
%res = add <4 x i32> %a, %b
ret <4 x i32> %res
}
define <4 x float> @test_float_vectors(<4 x float> %a, <4 x float> %b) {
; CHECK: remark: {{.*}} unable to lower arguments: <4 x float> (<4 x float>, <4 x float>)*
; CHECK-LABEL: warning: Instruction selection used fallback path for test_float_vectors
%res = fadd <4 x float> %a, %b
ret <4 x float> %res
}
define i64 @test_i64(i64 %a, i64 %b) {
; CHECK: remark: {{.*}} unable to lower arguments: i64 (i64, i64)*
; CHECK-LABEL: warning: Instruction selection used fallback path for test_i64
%res = add i64 %a, %b
ret i64 %res
}
define i128 @test_i128(i128 %a, i128 %b) {
; CHECK: remark: {{.*}} unable to lower arguments: i128 (i128, i128)*
; CHECK-LABEL: warning: Instruction selection used fallback path for test_i128
%res = add i128 %a, %b
ret i128 %res
}
define i17 @test_funny_ints(i17 %a, i17 %b) {
; CHECK: remark: {{.*}} unable to lower arguments: i17 (i17, i17)*
; CHECK-LABEL: warning: Instruction selection used fallback path for test_funny_ints
%res = add i17 %a, %b
ret i17 %res
}
define half @test_half(half %a, half %b) {
[ARM] Armv8.2-A FP16 code generation (part 1/3) This is the groundwork for Armv8.2-A FP16 code generation . Clang passes and returns _Float16 values as floats, together with the required bitconverts and truncs etc. to implement correct AAPCS behaviour, see D42318. We will implement half-precision argument passing/returning lowering in the ARM backend soon, but for now this means that this: _Float16 sub(_Float16 a, _Float16 b) { return a + b; } gets lowered to this: define float @sub(float %a.coerce, float %b.coerce) { entry: %0 = bitcast float %a.coerce to i32 %tmp.0.extract.trunc = trunc i32 %0 to i16 %1 = bitcast i16 %tmp.0.extract.trunc to half <SNIP> %add = fadd half %1, %3 <SNIP> } When FullFP16 is *not* supported, we don't make f16 a legal type, and we get legalization for "free", i.e. nothing changes and everything works as before. And also f16 argument passing/returning is handled. When FullFP16 is supported, we do make f16 a legal type, and have 2 places that we need to patch up: f16 argument passing and returning, which involves minor tweaks to avoid unnecessary code generation for some bitcasts. As a "demonstrator" that this works for the different FP16, FullFP16, softfp modes, etc., I've added match rules to the VSUB instruction description showing that we can codegen this instruction from IR, but more importantly, also to some conversion instructions. These conversions were causing issue before in the FP16 and FullFP16 cases. I've also added match rules to the VLDRH and VSTRH desriptions, so that we can actually compile the entire half-precision sub code example above. This showed that these loads and stores had the wrong addressing mode specified: AddrMode5 instead of AddrMode5FP16, which turned out not be implemented at all, so that has also been added. This is the minimal patch that shows all the different moving parts. In patch 2/3 I will add some efficient lowering of bitcasts, and in 2/3 I will add the remaining Armv8.2-A FP16 instruction descriptions. Thanks to Sam Parker and Oliver Stannard for their help and reviews! Differential Revision: https://reviews.llvm.org/D38315 llvm-svn: 323512
2018-01-26 17:26:40 +08:00
; CHECK: remark: {{.*}} unable to lower arguments: half (half, half)* (in function: test_half)
[ARM] GlobalISel: Make struct arguments fail elegantly The condition in isSupportedType didn't handle struct/array arguments properly. Fix the check and add a test to make sure we use the fallback path in this kind of situation. The test deals with some common cases where the call lowering should error out. There are still some issues here that need to be addressed (tail calls come to mind), but they can be addressed in other patches. llvm-svn: 300967
2017-04-21 19:53:01 +08:00
; CHECK-LABEL: warning: Instruction selection used fallback path for test_half
%res = fadd half %a, %b
ret half %res
}
[ARM] GlobalISel: Support array parameters/arguments Clang coerces structs into arrays, so it's a good idea to support them. Most of the support boils down to getting the splitToValueTypes helper to actually split types. We then use G_INSERT/G_EXTRACT to deal with the parts. llvm-svn: 304132
2017-05-29 15:01:52 +08:00
declare [16 x i32] @ret_demotion_target()
define [16 x i32] @test_ret_demotion() {
; CHECK: remark: {{.*}} unable to translate instruction: call{{.*}} @ret_demotion_target
; CHECK-LABEL: warning: Instruction selection used fallback path for test_ret_demotion
%res = call [16 x i32] @ret_demotion_target()
ret [16 x i32] %res
[ARM] GlobalISel: Make struct arguments fail elegantly The condition in isSupportedType didn't handle struct/array arguments properly. Fix the check and add a test to make sure we use the fallback path in this kind of situation. The test deals with some common cases where the call lowering should error out. There are still some issues here that need to be addressed (tail calls come to mind), but they can be addressed in other patches. llvm-svn: 300967
2017-04-21 19:53:01 +08:00
}
[ARM] GlobalISel: Support struct params/returns Very very similar to the support for arrays. As with arrays, we don't support returning large structs that wouldn't fit in R0-R3. Most front-ends would likely use sret arguments for that anyway. The only significant difference is that when splitting a struct, we need to make sure we set the correct original alignment on each member, otherwise it may get split incorrectly between stack and registers. llvm-svn: 304536
2017-06-02 18:16:48 +08:00
%large.struct = type { i32, i32, i32, i32, i32} ; Doesn't fit in R0-R3
declare %large.struct @large_struct_return_target()
define %large.struct @test_large_struct_return() {
; CHECK: remark: {{.*}} unable to translate instruction: call{{.*}} @large_struct_return_target
; CHECK-LABEL: warning: Instruction selection used fallback path for test_large_struct_return
%r = call %large.struct @large_struct_return_target()
ret %large.struct %r
[ARM] GlobalISel: Make struct arguments fail elegantly The condition in isSupportedType didn't handle struct/array arguments properly. Fix the check and add a test to make sure we use the fallback path in this kind of situation. The test deals with some common cases where the call lowering should error out. There are still some issues here that need to be addressed (tail calls come to mind), but they can be addressed in other patches. llvm-svn: 300967
2017-04-21 19:53:01 +08:00
}
[ARM] GlobalISel: Lower only homogeneous struct args Lowering mixed struct args, params and returns used G_INSERT, which is a bit more convoluted to support through the entire pipeline. Since they don't occur that often in practice, it's probably wiser to leave them out until later. Meanwhile, we can lower homogeneous structs using G_MERGE_VALUES, which has good support in the legalizer. These occur e.g. as the return of __aeabi_idivmod, so it's nice to be able to support them. llvm-svn: 305458
2017-06-15 17:42:02 +08:00
%mixed.struct = type {i32*, float, i32}
define %mixed.struct @test_mixed_struct(%mixed.struct %x) {
; CHECK: remark: {{.*}} unable to lower arguments: %mixed.struct (%mixed.struct)*
; CHECK-LABEL: warning: Instruction selection used fallback path for test_mixed_struct
ret %mixed.struct %x
}
[ARM] GlobalISel: Make struct arguments fail elegantly The condition in isSupportedType didn't handle struct/array arguments properly. Fix the check and add a test to make sure we use the fallback path in this kind of situation. The test deals with some common cases where the call lowering should error out. There are still some issues here that need to be addressed (tail calls come to mind), but they can be addressed in other patches. llvm-svn: 300967
2017-04-21 19:53:01 +08:00
define void @test_vararg_definition(i32 %a, ...) {
; CHECK: remark: {{.*}} unable to lower arguments: void (i32, ...)*
; CHECK-LABEL: warning: Instruction selection used fallback path for test_vararg_definition
ret void
}
define void @test_vararg_call(i32 %a) {
; CHECK: remark: {{.*}} unable to translate instruction: call
; CHECK-LABEL: warning: Instruction selection used fallback path for test_vararg_call
call void(i32, ...) @test_vararg_definition(i32 %a, i32 %a, i32 %a)
ret void
}
define i32 @test_thumb(i32 %a) #0 {
; CHECK: remark: {{.*}} unable to lower arguments: i32 (i32)*
; CHECK-LABEL: warning: Instruction selection used fallback path for test_thumb
ret i32 %a
}
[ARM] GlobalISel: Select simple G_GLOBAL_VALUE instructions Add support in the instruction selector for G_GLOBAL_VALUE for ELF and MachO for the static relocation model. We don't handle Windows yet because that's Thumb-only, and we don't handle Thumb in general at the moment. Support for PIC, ROPI, RWPI and TLS will be added in subsequent commits. Differential Revision: https://reviews.llvm.org/D35883 llvm-svn: 309927
2017-08-03 17:14:59 +08:00
@thread_local_global = thread_local global i32 42
define i32 @test_thread_local_global() {
; CHECK: remark: {{.*}} cannot select: {{.*}} G_GLOBAL_VALUE
; CHECK-LABEL: warning: Instruction selection used fallback path for test_thread_local_global
; PIC: remark: {{.*}} cannot select: {{.*}} G_GLOBAL_VALUE
; PIC-LABEL: warning: Instruction selection used fallback path for test_thread_local_global
; ROPI: remark: {{.*}} cannot select: {{.*}} G_GLOBAL_VALUE
; ROPI-LABEL: warning: Instruction selection used fallback path for test_thread_local_global
; RWPI: remark: {{.*}} cannot select: {{.*}} G_GLOBAL_VALUE
; RWPI-LABEL: warning: Instruction selection used fallback path for test_thread_local_global
; ROPI-RWPI: remark: {{.*}} cannot select: {{.*}} G_GLOBAL_VALUE
; ROPI-RWPI-LABEL: warning: Instruction selection used fallback path for test_thread_local_global
%v = load i32, i32* @thread_local_global
ret i32 %v
}
[ARM GlobalISel] Bail out for byval Fallback if we have a byval parameter or argument since we don't support them yet. llvm-svn: 319428
2017-11-30 20:23:44 +08:00
%byval.class = type { i32 }
define void @test_byval_arg(%byval.class* byval %x) {
; CHECK: remark: {{.*}} unable to lower arguments: void (%byval.class*)*
; CHECK-LABEL: warning: Instruction selection used fallback path for test_byval
ret void
}
define void @test_byval_param(%byval.class* %x) {
; CHECK: remark: {{.*}} unable to translate instruction: call
; CHECK-LABEL: warning: Instruction selection used fallback path for test_byval_param
call void @test_byval_arg(%byval.class* byval %x)
ret void
}
[ARM] GlobalISel: Make struct arguments fail elegantly The condition in isSupportedType didn't handle struct/array arguments properly. Fix the check and add a test to make sure we use the fallback path in this kind of situation. The test deals with some common cases where the call lowering should error out. There are still some issues here that need to be addressed (tail calls come to mind), but they can be addressed in other patches. llvm-svn: 300967
2017-04-21 19:53:01 +08:00
attributes #0 = { "target-features"="+thumb-mode" }