mirror of
https://github.com/c64scene-ar/llvm-6502.git
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584fedf188
opportunities. For example, this lets it emit this: movq (%rax), %rcx addq %rdx, %rcx instead of this: movq %rdx, %rcx addq (%rax), %rcx in the case where %rdx has subsequent uses. It's the same number of instructions, and usually the same encoding size on x86, but it appears faster, and in general, it may allow better scheduling for the load. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106493 91177308-0d34-0410-b5e6-96231b3b80d8
209 lines
4.6 KiB
LLVM
209 lines
4.6 KiB
LLVM
; RUN: llc < %s -mtriple=i686-pc-linux-gnu -relocation-model=pic -asm-verbose=false -post-RA-scheduler=false | FileCheck %s -check-prefix=LINUX
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@ptr = external global i32*
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@dst = external global i32
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@src = external global i32
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define void @test0() nounwind {
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entry:
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store i32* @dst, i32** @ptr
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%tmp.s = load i32* @src
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store i32 %tmp.s, i32* @dst
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ret void
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; LINUX: test0:
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; LINUX: call .L0$pb
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; LINUX-NEXT: .L0$pb:
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; LINUX-NEXT: popl
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; LINUX: addl $_GLOBAL_OFFSET_TABLE_+(.L{{.*}}-.L0$pb),
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; LINUX: movl dst@GOT(%eax),
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; LINUX: movl ptr@GOT(%eax),
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; LINUX: movl src@GOT(%eax),
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; LINUX: ret
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}
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@ptr2 = global i32* null
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@dst2 = global i32 0
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@src2 = global i32 0
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define void @test1() nounwind {
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entry:
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store i32* @dst2, i32** @ptr2
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%tmp.s = load i32* @src2
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store i32 %tmp.s, i32* @dst2
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ret void
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; LINUX: test1:
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; LINUX: call .L1$pb
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; LINUX-NEXT: .L1$pb:
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; LINUX-NEXT: popl
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; LINUX: addl $_GLOBAL_OFFSET_TABLE_+(.L{{.*}}-.L1$pb), %eax
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; LINUX: movl dst2@GOT(%eax),
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; LINUX: movl ptr2@GOT(%eax),
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; LINUX: movl src2@GOT(%eax),
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; LINUX: ret
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}
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declare i8* @malloc(i32)
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define void @test2() nounwind {
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entry:
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%ptr = call i8* @malloc(i32 40)
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ret void
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; LINUX: test2:
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; LINUX: pushl %ebx
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; LINUX-NEXT: subl $8, %esp
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; LINUX-NEXT: call .L2$pb
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; LINUX-NEXT: .L2$pb:
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; LINUX-NEXT: popl %ebx
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; LINUX: addl $_GLOBAL_OFFSET_TABLE_+(.L{{.*}}-.L2$pb), %ebx
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; LINUX: movl $40, (%esp)
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; LINUX: call malloc@PLT
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; LINUX: addl $8, %esp
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; LINUX: popl %ebx
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; LINUX: ret
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}
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@pfoo = external global void(...)*
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define void @test3() nounwind {
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entry:
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%tmp = call void(...)*(...)* @afoo()
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store void(...)* %tmp, void(...)** @pfoo
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%tmp1 = load void(...)** @pfoo
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call void(...)* %tmp1()
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ret void
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; LINUX: test3:
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; LINUX: call .L3$pb
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; LINUX-NEXT: .L3$pb:
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; LINUX: popl
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; LINUX: addl $_GLOBAL_OFFSET_TABLE_+(.L{{.*}}-.L3$pb),
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; LINUX: movl pfoo@GOT(%esi),
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; LINUX: call afoo@PLT
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; LINUX: call *
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}
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declare void(...)* @afoo(...)
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define void @test4() nounwind {
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entry:
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call void(...)* @foo()
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ret void
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; LINUX: test4:
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; LINUX: call .L4$pb
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; LINUX: popl %ebx
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; LINUX: addl $_GLOBAL_OFFSET_TABLE_+(.L{{.*}}-.L4$pb), %ebx
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; LINUX: call foo@PLT
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}
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declare void @foo(...)
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@ptr6 = internal global i32* null
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@dst6 = internal global i32 0
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@src6 = internal global i32 0
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define void @test5() nounwind {
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entry:
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store i32* @dst6, i32** @ptr6
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%tmp.s = load i32* @src6
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store i32 %tmp.s, i32* @dst6
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ret void
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; LINUX: test5:
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; LINUX: call .L5$pb
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; LINUX-NEXT: .L5$pb:
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; LINUX-NEXT: popl %eax
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; LINUX: addl $_GLOBAL_OFFSET_TABLE_+(.L{{.*}}-.L5$pb), %eax
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; LINUX: leal dst6@GOTOFF(%eax), %ecx
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; LINUX: movl %ecx, ptr6@GOTOFF(%eax)
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; LINUX: movl src6@GOTOFF(%eax), %ecx
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; LINUX: movl %ecx, dst6@GOTOFF(%eax)
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; LINUX: ret
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}
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;; Test constant pool references.
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define double @test6(i32 %a.u) nounwind {
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entry:
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%tmp = icmp eq i32 %a.u,0
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%retval = select i1 %tmp, double 4.561230e+02, double 1.234560e+02
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ret double %retval
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; LINUX: .LCPI6_0:
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; LINUX: test6:
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; LINUX: call .L6$pb
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; LINUX: .L6$pb:
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; LINUX: addl $_GLOBAL_OFFSET_TABLE_+(.L{{.*}}-.L6$pb),
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; LINUX: fldl .LCPI6_0@GOTOFF(
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}
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;; Test jump table references.
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define void @test7(i32 %n.u) nounwind {
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entry:
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switch i32 %n.u, label %bb12 [i32 1, label %bb i32 2, label %bb6 i32 4, label %bb7 i32 5, label %bb8 i32 6, label %bb10 i32 7, label %bb1 i32 8, label %bb3 i32 9, label %bb4 i32 10, label %bb9 i32 11, label %bb2 i32 12, label %bb5 i32 13, label %bb11 ]
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bb:
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tail call void(...)* @foo1()
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ret void
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bb1:
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tail call void(...)* @foo2()
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ret void
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bb2:
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tail call void(...)* @foo6()
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ret void
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bb3:
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tail call void(...)* @foo3()
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ret void
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bb4:
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tail call void(...)* @foo4()
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ret void
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bb5:
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tail call void(...)* @foo5()
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ret void
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bb6:
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tail call void(...)* @foo1()
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ret void
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bb7:
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tail call void(...)* @foo2()
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ret void
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bb8:
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tail call void(...)* @foo6()
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ret void
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bb9:
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tail call void(...)* @foo3()
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ret void
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bb10:
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tail call void(...)* @foo4()
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ret void
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bb11:
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tail call void(...)* @foo5()
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ret void
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bb12:
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tail call void(...)* @foo6()
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ret void
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; LINUX: test7:
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; LINUX: call .L7$pb
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; LINUX: .L7$pb:
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; LINUX: addl $_GLOBAL_OFFSET_TABLE_+(.L{{.*}}-.L7$pb),
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; LINUX: .LJTI7_0@GOTOFF(
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; LINUX: jmpl *
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; LINUX: .LJTI7_0:
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; LINUX: .long .LBB7_2@GOTOFF
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; LINUX: .long .LBB7_8@GOTOFF
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; LINUX: .long .LBB7_14@GOTOFF
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; LINUX: .long .LBB7_9@GOTOFF
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; LINUX: .long .LBB7_10@GOTOFF
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}
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declare void @foo1(...)
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declare void @foo2(...)
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declare void @foo6(...)
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declare void @foo3(...)
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declare void @foo4(...)
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declare void @foo5(...)
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