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de05043e78
Teach the generic instruction selection helper functions to constrain the register classes of their input operands. For non-physical register references, the generic code needs to be careful not to mess that up when replacing references to result registers. As the comment indicates for MachineRegisterInfo::replaceRegWith(), it's important to call constrainRegClass() first. rdar://12594152 llvm-svn: 188593
185 lines
4.0 KiB
LLVM
185 lines
4.0 KiB
LLVM
; RUN: llc < %s -O0 -fast-isel-abort -relocation-model=dynamic-no-pic -mtriple=armv7-apple-ios -verify-machineinstrs | FileCheck %s --check-prefix=ARM
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; RUN: llc < %s -O0 -fast-isel-abort -relocation-model=dynamic-no-pic -mtriple=armv7-linux-gnueabi -verify-machineinstrs | FileCheck %s --check-prefix=ARM
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; RUN: llc < %s -O0 -fast-isel-abort -relocation-model=dynamic-no-pic -mtriple=thumbv7-apple-ios -verify-machineinstrs | FileCheck %s --check-prefix=THUMB
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; Very basic fast-isel functionality.
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define i32 @test0(i32 %a, i32 %b) nounwind {
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entry:
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%a.addr = alloca i32, align 4
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%b.addr = alloca i32, align 4
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store i32 %a, i32* %a.addr
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store i32 %b, i32* %b.addr
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%tmp = load i32* %a.addr
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%tmp1 = load i32* %b.addr
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%add = add nsw i32 %tmp, %tmp1
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ret i32 %add
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}
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; Check truncate to bool
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define void @test1(i32 %tmp) nounwind {
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entry:
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%tobool = trunc i32 %tmp to i1
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br i1 %tobool, label %if.then, label %if.end
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if.then: ; preds = %entry
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call void @test1(i32 0)
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br label %if.end
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if.end: ; preds = %if.then, %entry
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ret void
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; ARM-LABEL: test1:
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; ARM: tst r0, #1
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; THUMB-LABEL: test1:
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; THUMB: tst.w r0, #1
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}
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; Check some simple operations with immediates
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define void @test2(i32 %tmp, i32* %ptr) nounwind {
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; THUMB-LABEL: test2:
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; ARM-LABEL: test2:
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b1:
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%a = add i32 %tmp, 4096
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store i32 %a, i32* %ptr
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br label %b2
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; THUMB: add.w {{.*}} #4096
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; ARM: add {{.*}} #4096
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b2:
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%b = add i32 %tmp, 4095
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store i32 %b, i32* %ptr
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br label %b3
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; THUMB: addw {{.*}} #4095
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; ARM: movw {{.*}} #4095
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; ARM: add
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b3:
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%c = or i32 %tmp, 4
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store i32 %c, i32* %ptr
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ret void
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; THUMB: orr {{.*}} #4
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; ARM: orr {{.*}} #4
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}
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define void @test3(i32 %tmp, i32* %ptr1, i16* %ptr2, i8* %ptr3) nounwind {
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; THUMB-LABEL: test3:
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; ARM-LABEL: test3:
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bb1:
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%a1 = trunc i32 %tmp to i16
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%a2 = trunc i16 %a1 to i8
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%a3 = trunc i8 %a2 to i1
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%a4 = zext i1 %a3 to i8
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store i8 %a4, i8* %ptr3
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%a5 = zext i8 %a4 to i16
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store i16 %a5, i16* %ptr2
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%a6 = zext i16 %a5 to i32
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store i32 %a6, i32* %ptr1
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br label %bb2
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; THUMB: and
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; THUMB: strb
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; THUMB: and{{.*}}, #255
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; THUMB: strh
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; THUMB: uxth
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; ARM: and
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; ARM: strb
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; ARM: and{{.*}}, #255
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; ARM: strh
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; ARM: uxth
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bb2:
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%b1 = trunc i32 %tmp to i16
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%b2 = trunc i16 %b1 to i8
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store i8 %b2, i8* %ptr3
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%b3 = sext i8 %b2 to i16
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store i16 %b3, i16* %ptr2
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%b4 = sext i16 %b3 to i32
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store i32 %b4, i32* %ptr1
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br label %bb3
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; THUMB: strb
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; THUMB: sxtb
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; THUMB: strh
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; THUMB: sxth
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; ARM: strb
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; ARM: sxtb
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; ARM: strh
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; ARM: sxth
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bb3:
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%c1 = load i8* %ptr3
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%c2 = load i16* %ptr2
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%c3 = load i32* %ptr1
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%c4 = zext i8 %c1 to i32
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%c5 = sext i16 %c2 to i32
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%c6 = add i32 %c4, %c5
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%c7 = sub i32 %c3, %c6
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store i32 %c7, i32* %ptr1
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ret void
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; THUMB: ldrb
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; THUMB: ldrh
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; THUMB: and{{.*}}, #255
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; THUMB: sxth
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; THUMB: add
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; THUMB: sub
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; ARM: ldrb
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; ARM: ldrh
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; ARM: and{{.*}}, #255
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; ARM: sxth
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; ARM: add
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; ARM: sub
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}
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; Check loads/stores with globals
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@test4g = external global i32
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define void @test4() {
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%a = load i32* @test4g
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%b = add i32 %a, 1
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store i32 %b, i32* @test4g
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ret void
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; Note that relocations are either movw/movt or constant pool
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; loads. Different platforms will select different approaches.
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; THUMB: {{(movw r0, :lower16:L_test4g\$non_lazy_ptr)|(ldr.n r0, .LCPI)}}
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; THUMB: {{(movt r0, :upper16:L_test4g\$non_lazy_ptr)?}}
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; THUMB: ldr r0, [r0]
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; THUMB: ldr r1, [r0]
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; THUMB: adds r1, #1
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; THUMB: str r1, [r0]
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; ARM: {{(movw r0, :lower16:L_test4g\$non_lazy_ptr)|(ldr r0, .LCPI)}}
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; ARM: {{(movt r0, :upper16:L_test4g\$non_lazy_ptr)?}}
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; ARM: ldr r0, [r0]
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; ARM: ldr r1, [r0]
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; ARM: add r1, r1, #1
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; ARM: str r1, [r0]
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}
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; ARM: @urem_fold
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; THUMB: @urem_fold
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; ARM: and r0, r0, #31
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; THUMB: and r0, r0, #31
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define i32 @urem_fold(i32 %a) nounwind {
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%rem = urem i32 %a, 32
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ret i32 %rem
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}
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define i32 @trap_intrinsic() noreturn nounwind {
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entry:
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; ARM: @trap_intrinsic
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; THUMB: @trap_intrinsic
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; ARM: trap
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; THUMB: trap
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tail call void @llvm.trap( )
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unreachable
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}
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declare void @llvm.trap() nounwind
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