mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-05 13:30:38 +00:00
00a99a3584
only run for x86 with fastisel. I've found it being very effective in eliminating some obvious dead code as result of formal parameter lowering especially when tail call optimization eliminated the need for some of the loads from fixed frame objects. It also shrinks a number of the tests. A couple of tests no longer make sense and are now eliminated. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95493 91177308-0d34-0410-b5e6-96231b3b80d8
198 lines
3.5 KiB
LLVM
198 lines
3.5 KiB
LLVM
; RUN: llc < %s -march=x86 -asm-verbose=false | FileCheck %s -check-prefix=32
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; RUN: llc < %s -march=x86-64 -asm-verbose=false | FileCheck %s -check-prefix=64
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define void @t1(i32 %x) nounwind ssp {
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entry:
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; 32: t1:
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; 32: jmp {{_?}}foo
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; 64: t1:
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; 64: jmp {{_?}}foo
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tail call void @foo() nounwind
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ret void
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}
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declare void @foo()
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define void @t2() nounwind ssp {
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entry:
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; 32: t2:
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; 32: jmp {{_?}}foo2
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; 64: t2:
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; 64: jmp {{_?}}foo2
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%0 = tail call i32 @foo2() nounwind
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ret void
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}
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declare i32 @foo2()
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define void @t3() nounwind ssp {
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entry:
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; 32: t3:
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; 32: jmp {{_?}}foo3
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; 64: t3:
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; 64: jmp {{_?}}foo3
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%0 = tail call i32 @foo3() nounwind
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ret void
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}
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declare i32 @foo3()
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define void @t4(void (i32)* nocapture %x) nounwind ssp {
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entry:
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; 32: t4:
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; 32: call *
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; FIXME: gcc can generate a tailcall for this. But it's tricky.
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; 64: t4:
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; 64-NOT: call
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; 64: jmpq *
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tail call void %x(i32 0) nounwind
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ret void
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}
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define void @t5(void ()* nocapture %x) nounwind ssp {
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entry:
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; 32: t5:
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; 32-NOT: call
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; 32: jmpl *
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; 64: t5:
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; 64-NOT: call
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; 64: jmpq *
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tail call void %x() nounwind
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ret void
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}
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define i32 @t6(i32 %x) nounwind ssp {
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entry:
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; 32: t6:
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; 32: call {{_?}}t6
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; 32: jmp {{_?}}bar
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; 64: t6:
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; 64: jmp {{_?}}t6
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; 64: jmp {{_?}}bar
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%0 = icmp slt i32 %x, 10
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br i1 %0, label %bb, label %bb1
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bb:
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%1 = add nsw i32 %x, -1
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%2 = tail call i32 @t6(i32 %1) nounwind ssp
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ret i32 %2
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bb1:
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%3 = tail call i32 @bar(i32 %x) nounwind
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ret i32 %3
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}
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declare i32 @bar(i32)
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define i32 @t7(i32 %a, i32 %b, i32 %c) nounwind ssp {
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entry:
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; 32: t7:
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; 32: jmp {{_?}}bar2
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; 64: t7:
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; 64: jmp {{_?}}bar2
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%0 = tail call i32 @bar2(i32 %a, i32 %b, i32 %c) nounwind
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ret i32 %0
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}
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declare i32 @bar2(i32, i32, i32)
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define signext i16 @t8() nounwind ssp {
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entry:
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; 32: t8:
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; 32: call {{_?}}bar3
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; 64: t8:
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; 64: callq {{_?}}bar3
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%0 = tail call signext i16 @bar3() nounwind ; <i16> [#uses=1]
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ret i16 %0
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}
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declare signext i16 @bar3()
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define signext i16 @t9(i32 (i32)* nocapture %x) nounwind ssp {
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entry:
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; 32: t9:
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; 32: call *
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; 64: t9:
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; 64: callq *
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%0 = bitcast i32 (i32)* %x to i16 (i32)*
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%1 = tail call signext i16 %0(i32 0) nounwind
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ret i16 %1
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}
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define void @t10() nounwind ssp {
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entry:
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; 32: t10:
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; 32: call
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; 64: t10:
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; 64: callq
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%0 = tail call i32 @foo4() noreturn nounwind
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unreachable
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}
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declare i32 @foo4()
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define i32 @t11(i32 %x, i32 %y, i32 %z.0, i32 %z.1, i32 %z.2) nounwind ssp {
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; In 32-bit mode, it's emitting a bunch of dead loads that are not being
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; eliminated currently.
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; 32: t11:
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; 32-NOT: subl ${{[0-9]+}}, %esp
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; 32: jne
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; 32-NOT: movl
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; 32-NOT: addl ${{[0-9]+}}, %esp
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; 32: jmp {{_?}}foo5
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; 64: t11:
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; 64-NOT: subq ${{[0-9]+}}, %esp
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; 64-NOT: addq ${{[0-9]+}}, %esp
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; 64: jmp {{_?}}foo5
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entry:
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%0 = icmp eq i32 %x, 0
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br i1 %0, label %bb6, label %bb
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bb:
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%1 = tail call i32 @foo5(i32 %x, i32 %y, i32 %z.0, i32 %z.1, i32 %z.2) nounwind
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ret i32 %1
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bb6:
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ret i32 0
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}
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declare i32 @foo5(i32, i32, i32, i32, i32)
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%struct.t = type { i32, i32, i32, i32, i32 }
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define i32 @t12(i32 %x, i32 %y, %struct.t* byval align 4 %z) nounwind ssp {
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; 32: t12:
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; 32-NOT: subl ${{[0-9]+}}, %esp
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; 32-NOT: addl ${{[0-9]+}}, %esp
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; 32: jmp {{_?}}foo6
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; 64: t12:
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; 64-NOT: subq ${{[0-9]+}}, %esp
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; 64-NOT: addq ${{[0-9]+}}, %esp
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; 64: jmp {{_?}}foo6
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entry:
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%0 = icmp eq i32 %x, 0
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br i1 %0, label %bb2, label %bb
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bb:
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%1 = tail call i32 @foo6(i32 %x, i32 %y, %struct.t* byval align 4 %z) nounwind
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ret i32 %1
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bb2:
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ret i32 0
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}
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declare i32 @foo6(i32, i32, %struct.t* byval align 4)
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