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Cortex-M4 only has single-precision floating point support, so any LLVM "double" type will have been split into 2 i32s by now. Fortunately, the consecutive-register framework turns out to be precisely what's needed to reconstruct the double and follow AAPCS-VFP correctly! rdar://problem/17012966 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@209650 91177308-0d34-0410-b5e6-96231b3b80d8
112 lines
3.7 KiB
LLVM
112 lines
3.7 KiB
LLVM
; RUN: llc < %s -mtriple=armv7-linux-gnueabihf -o - | FileCheck %s
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; RUN: llc < %s -mtriple=thumbv7em-none-eabi -mcpu=cortex-m4 | FileCheck %s --check-prefix=CHECK-M4F
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target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-n32-S64"
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define arm_aapcs_vfpcc void @test_1float({ float } %a) {
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call arm_aapcs_vfpcc void @test_1float({ float } { float 1.0 })
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ret void
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; CHECK-LABEL: test_1float:
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; CHECK-DAG: vmov.f32 s0, #1.{{0+}}e+00
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; CHECK: bl test_1float
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; CHECK-M4F-LABEL: test_1float:
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; CHECK-M4F-DAG: vmov.f32 s0, #1.{{0+}}e+00
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; CHECK-M4F: bl test_1float
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}
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define arm_aapcs_vfpcc void @test_2float({ float, float } %a) {
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call arm_aapcs_vfpcc void @test_2float({ float, float } { float 1.0, float 2.0 })
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ret void
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; CHECK-LABEL: test_2float:
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; CHECK-DAG: vmov.f32 s0, #1.{{0+}}e+00
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; CHECK-DAG: vmov.f32 s1, #2.{{0+}}e+00
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; CHECK: bl test_2float
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; CHECK-M4F-LABEL: test_2float:
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; CHECK-M4F-DAG: vmov.f32 s0, #1.{{0+}}e+00
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; CHECK-M4F-DAG: vmov.f32 s1, #2.{{0+}}e+00
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; CHECK-M4F: bl test_2float
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}
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define arm_aapcs_vfpcc void @test_3float({ float, float, float } %a) {
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call arm_aapcs_vfpcc void @test_3float({ float, float, float } { float 1.0, float 2.0, float 3.0 })
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ret void
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; CHECK-LABEL: test_3float:
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; CHECK-DAG: vmov.f32 s0, #1.{{0+}}e+00
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; CHECK-DAG: vmov.f32 s1, #2.{{0+}}e+00
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; CHECK-DAG: vmov.f32 s2, #3.{{0+}}e+00
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; CHECK: bl test_3float
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; CHECK-M4F-LABEL: test_3float:
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; CHECK-M4F-DAG: vmov.f32 s0, #1.{{0+}}e+00
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; CHECK-M4F-DAG: vmov.f32 s1, #2.{{0+}}e+00
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; CHECK-M4F-DAG: vmov.f32 s2, #3.{{0+}}e+00
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; CHECK-M4F: bl test_3float
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}
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define arm_aapcs_vfpcc void @test_1double({ double } %a) {
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; CHECK-LABEL: test_1double:
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; CHECK-DAG: vmov.f64 d0, #1.{{0+}}e+00
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; CHECK: bl test_1double
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; CHECK-M4F-LABEL: test_1double:
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; CHECK-M4F: movs [[ONEHI:r[0-9]+]], #0
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; CHECK-M4F: movs [[ONELO:r[0-9]+]], #0
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; CHECK-M4F: movt [[ONEHI]], #16368
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; CHECK-M4F-DAG: vmov s0, [[ONELO]]
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; CHECK-M4F-DAG: vmov s1, [[ONEHI]]
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; CHECK-M4F: bl test_1double
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call arm_aapcs_vfpcc void @test_1double({ double } { double 1.0 })
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ret void
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}
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; Final double argument might be put in s15 & [sp] if we're careless. It should
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; go all on the stack.
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define arm_aapcs_vfpcc void @test_1double_nosplit([4 x float], [4 x double], [3 x float], double %a) {
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; CHECK-LABEL: test_1double_nosplit:
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; CHECK-DAG: mov [[ONELO:r[0-9]+]], #0
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; CHECK-DAG: movw [[ONEHI:r[0-9]+]], #0
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; CHECK-DAG: movt [[ONEHI]], #16368
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; CHECK: strd [[ONELO]], [[ONEHI]], [sp]
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; CHECK: bl test_1double_nosplit
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; CHECK-M4F-LABEL: test_1double_nosplit:
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; CHECK-M4F: movs [[ONELO:r[0-9]+]], #0
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; CHECK-M4F: movs [[ONEHI:r[0-9]+]], #0
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; CHECK-M4F: movt [[ONEHI]], #16368
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; CHECK-M4F-DAG: str [[ONELO]], [sp]
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; CHECK-M4F-DAG: str [[ONEHI]], [sp, #4]
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; CHECK-M4F: bl test_1double_nosplit
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call arm_aapcs_vfpcc void @test_1double_nosplit([4 x float] undef, [4 x double] undef, [3 x float] undef, double 1.0)
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ret void
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}
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; Final double argument might go at [sp, #4] if we're careless. Should go at
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; [sp, #8] to preserve alignment.
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define arm_aapcs_vfpcc void @test_1double_misaligned([4 x double], [4 x double], float, double) {
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call arm_aapcs_vfpcc void @test_1double_misaligned([4 x double] undef, [4 x double] undef, float undef, double 1.0)
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; CHECK-LABEL: test_1double_misaligned:
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; CHECK-DAG: mov [[ONELO:r[0-9]+]], #0
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; CHECK-DAG: mov r[[BASE:[0-9]+]], sp
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; CHECK-DAG: movw [[ONEHI:r[0-9]+]], #0
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; CHECK-DAG: movt [[ONEHI]], #16368
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; CHECK-DAG: str [[ONELO]], [r[[BASE]], #8]!
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; CHECK-DAG: str [[ONEHI]], [r[[BASE]], #4]
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; CHECK-M4F-LABEL: test_1double_misaligned:
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; CHECK-M4F: movs [[ONELO:r[0-9]+]], #0
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; CHECK-M4F: movs [[ONEHI:r[0-9]+]], #0
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; CHECK-M4F: movt [[ONEHI]], #16368
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; CHECK-M4F-DAG: str [[ONELO]], [sp, #8]
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; CHECK-M4F-DAG: str [[ONEHI]], [sp, #12]
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; CHECK-M4F: bl test_1double_misaligned
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ret void
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}
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