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llvm/test/CodeGen/ARM/fast-isel.ll
Chad Rosier e5e674ba11 [fast-isel] Fallback to SelectionDAG isel if we require strict alignment for 
non-aligned i32 loads/stores.
rdar://12304911

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164381 91177308-0d34-0410-b5e6-96231b3b80d8
2012-09-21 16:58:35 +00:00

307 lines
6.7 KiB
LLVM
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; RUN: llc < %s -O0 -fast-isel-abort -relocation-model=dynamic-no-pic -mtriple=armv7-apple-ios | FileCheck %s --check-prefix=ARM
; RUN: llc < %s -O0 -fast-isel-abort -relocation-model=dynamic-no-pic -mtriple=thumbv7-apple-ios | FileCheck %s --check-prefix=THUMB
; RUN: llc < %s -O0 -arm-strict-align -relocation-model=dynamic-no-pic -mtriple=armv7-apple-ios | FileCheck %s --check-prefix=ARM-STRICT-ALIGN
; RUN: llc < %s -O0 -arm-strict-align -relocation-model=dynamic-no-pic -mtriple=thumbv7-apple-ios | FileCheck %s --check-prefix=THUMB-STRICT-ALIGN
; Very basic fast-isel functionality.
define i32 @add(i32 %a, i32 %b) nounwind {
entry:
%a.addr = alloca i32, align 4
%b.addr = alloca i32, align 4
store i32 %a, i32* %a.addr
store i32 %b, i32* %b.addr
%tmp = load i32* %a.addr
%tmp1 = load i32* %b.addr
%add = add nsw i32 %tmp, %tmp1
ret i32 %add
}
; Check truncate to bool
define void @test1(i32 %tmp) nounwind {
entry:
%tobool = trunc i32 %tmp to i1
br i1 %tobool, label %if.then, label %if.end
if.then: ; preds = %entry
call void @test1(i32 0)
br label %if.end
if.end: ; preds = %if.then, %entry
ret void
; ARM: test1:
; ARM: tst r0, #1
; THUMB: test1:
; THUMB: tst.w r0, #1
}
; Check some simple operations with immediates
define void @test2(i32 %tmp, i32* %ptr) nounwind {
; THUMB: test2:
; ARM: test2:
b1:
%a = add i32 %tmp, 4096
store i32 %a, i32* %ptr
br label %b2
; THUMB: add.w {{.*}} #4096
; ARM: add {{.*}} #4096
b2:
%b = add i32 %tmp, 4095
store i32 %b, i32* %ptr
br label %b3
; THUMB: addw {{.*}} #4095
; ARM: movw {{.*}} #4095
; ARM: add
b3:
%c = or i32 %tmp, 4
store i32 %c, i32* %ptr
ret void
; THUMB: orr {{.*}} #4
; ARM: orr {{.*}} #4
}
define void @test3(i32 %tmp, i32* %ptr1, i16* %ptr2, i8* %ptr3) nounwind {
; THUMB: test3:
; ARM: test3:
bb1:
%a1 = trunc i32 %tmp to i16
%a2 = trunc i16 %a1 to i8
%a3 = trunc i8 %a2 to i1
%a4 = zext i1 %a3 to i8
store i8 %a4, i8* %ptr3
%a5 = zext i8 %a4 to i16
store i16 %a5, i16* %ptr2
%a6 = zext i16 %a5 to i32
store i32 %a6, i32* %ptr1
br label %bb2
; THUMB: and
; THUMB: strb
; THUMB: uxtb
; THUMB: strh
; THUMB: uxth
; ARM: and
; ARM: strb
; ARM: uxtb
; ARM: strh
; ARM: uxth
bb2:
%b1 = trunc i32 %tmp to i16
%b2 = trunc i16 %b1 to i8
store i8 %b2, i8* %ptr3
%b3 = sext i8 %b2 to i16
store i16 %b3, i16* %ptr2
%b4 = sext i16 %b3 to i32
store i32 %b4, i32* %ptr1
br label %bb3
; THUMB: strb
; THUMB: sxtb
; THUMB: strh
; THUMB: sxth
; ARM: strb
; ARM: sxtb
; ARM: strh
; ARM: sxth
bb3:
%c1 = load i8* %ptr3
%c2 = load i16* %ptr2
%c3 = load i32* %ptr1
%c4 = zext i8 %c1 to i32
%c5 = sext i16 %c2 to i32
%c6 = add i32 %c4, %c5
%c7 = sub i32 %c3, %c6
store i32 %c7, i32* %ptr1
ret void
; THUMB: ldrb
; THUMB: ldrh
; THUMB: uxtb
; THUMB: sxth
; THUMB: add
; THUMB: sub
; ARM: ldrb
; ARM: ldrh
; ARM: uxtb
; ARM: sxth
; ARM: add
; ARM: sub
}
; Check loads/stores with globals
@test4g = external global i32
define void @test4() {
%a = load i32* @test4g
%b = add i32 %a, 1
store i32 %b, i32* @test4g
ret void
; THUMB: movw r0, :lower16:L_test4g$non_lazy_ptr
; THUMB: movt r0, :upper16:L_test4g$non_lazy_ptr
; THUMB: ldr r0, [r0]
; THUMB: ldr r1, [r0]
; THUMB: adds r1, #1
; THUMB: str r1, [r0]
; ARM: movw r0, :lower16:L_test4g$non_lazy_ptr
; ARM: movt r0, :upper16:L_test4g$non_lazy_ptr
; ARM: ldr r0, [r0]
; ARM: ldr r1, [r0]
; ARM: add r1, r1, #1
; ARM: str r1, [r0]
}
; Check unaligned stores
%struct.anon = type <{ float }>
@a = common global %struct.anon* null, align 4
define void @unaligned_store(float %x, float %y) nounwind {
entry:
; ARM: @unaligned_store
; ARM: vmov r1, s0
; ARM: str r1, [r0]
; THUMB: @unaligned_store
; THUMB: vmov r1, s0
; THUMB: str r1, [r0]
%add = fadd float %x, %y
%0 = load %struct.anon** @a, align 4
%x1 = getelementptr inbounds %struct.anon* %0, i32 0, i32 0
store float %add, float* %x1, align 1
ret void
}
; Doublewords require only word-alignment.
; rdar://10528060
%struct.anon.0 = type { double }
@foo_unpacked = common global %struct.anon.0 zeroinitializer, align 4
define void @test5(double %a, double %b) nounwind {
entry:
; ARM: @test5
; THUMB: @test5
%add = fadd double %a, %b
store double %add, double* getelementptr inbounds (%struct.anon.0* @foo_unpacked, i32 0, i32 0), align 4
; ARM: vstr d16, [r0]
; THUMB: vstr d16, [r0]
ret void
}
; Check unaligned loads of floats
%class.TAlignTest = type <{ i16, float }>
define zeroext i1 @test6(%class.TAlignTest* %this) nounwind align 2 {
entry:
; ARM: @test6
; THUMB: @test6
%0 = alloca %class.TAlignTest*, align 4
store %class.TAlignTest* %this, %class.TAlignTest** %0, align 4
%1 = load %class.TAlignTest** %0
%2 = getelementptr inbounds %class.TAlignTest* %1, i32 0, i32 1
%3 = load float* %2, align 1
%4 = fcmp une float %3, 0.000000e+00
; ARM: ldr r0, [r0, #2]
; ARM: vmov s0, r0
; ARM: vcmpe.f32 s0, #0
; THUMB: ldr.w r0, [r0, #2]
; THUMB: vmov s0, r0
; THUMB: vcmpe.f32 s0, #0
ret i1 %4
}
; ARM: @urem_fold
; THUMB: @urem_fold
; ARM: and r0, r0, #31
; THUMB: and r0, r0, #31
define i32 @urem_fold(i32 %a) nounwind {
%rem = urem i32 %a, 32
ret i32 %rem
}
define i32 @test7() noreturn nounwind {
entry:
; ARM: @test7
; THUMB: @test7
; ARM: trap
; THUMB: trap
tail call void @llvm.trap( )
unreachable
}
declare void @llvm.trap() nounwind
define void @unaligned_i16_store(i16 %x, i16* %y) nounwind {
entry:
; ARM-STRICT-ALIGN: @unaligned_i16_store
; ARM-STRICT-ALIGN: strb
; ARM-STRICT-ALIGN: strb
; THUMB-STRICT-ALIGN: @unaligned_i16_store
; THUMB-STRICT-ALIGN: strb
; THUMB-STRICT-ALIGN: strb
store i16 %x, i16* %y, align 1
ret void
}
define i16 @unaligned_i16_load(i16* %x) nounwind {
entry:
; ARM-STRICT-ALIGN: @unaligned_i16_load
; ARM-STRICT-ALIGN: ldrb
; ARM-STRICT-ALIGN: ldrb
; THUMB-STRICT-ALIGN: @unaligned_i16_load
; THUMB-STRICT-ALIGN: ldrb
; THUMB-STRICT-ALIGN: ldrb
%0 = load i16* %x, align 1
ret i16 %0
}
define void @unaligned_i32_store(i32 %x, i32* %y) nounwind {
entry:
; ARM-STRICT-ALIGN: @unaligned_i32_store
; ARM-STRICT-ALIGN: strb
; ARM-STRICT-ALIGN: strb
; ARM-STRICT-ALIGN: strb
; ARM-STRICT-ALIGN: strb
; THUMB-STRICT-ALIGN: @unaligned_i32_store
; THUMB-STRICT-ALIGN: strb
; THUMB-STRICT-ALIGN: strb
; THUMB-STRICT-ALIGN: strb
; THUMB-STRICT-ALIGN: strb
store i32 %x, i32* %y, align 1
ret void
}
define i32 @unaligned_i32_load(i32* %x) nounwind {
entry:
; ARM-STRICT-ALIGN: @unaligned_i32_load
; ARM-STRICT-ALIGN: ldrb
; ARM-STRICT-ALIGN: ldrb
; ARM-STRICT-ALIGN: ldrb
; ARM-STRICT-ALIGN: ldrb
; THUMB-STRICT-ALIGN: @unaligned_i32_load
; THUMB-STRICT-ALIGN: ldrb
; THUMB-STRICT-ALIGN: ldrb
; THUMB-STRICT-ALIGN: ldrb
; THUMB-STRICT-ALIGN: ldrb
%0 = load i32* %x, align 1
ret i32 %0
}
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