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https://github.com/c64scene-ar/llvm-6502.git
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35efeb5e16
Summary: The 'R' constraint is actually supposed to be much more complicated than this and is defined in terms of whether it will cause macro expansion in the assembler. 'R' is getting less useful due to architecture changes and ought to be replaced by other constraints. We therefore implement 9-bit offsets which will work for all subtargets and all instructions. Reviewers: vkalintiris Reviewed By: vkalintiris Subscribers: llvm-commits Differential Revision: http://reviews.llvm.org/D8440 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@233537 91177308-0d34-0410-b5e6-96231b3b80d8
61 lines
1.5 KiB
LLVM
61 lines
1.5 KiB
LLVM
; RUN: llc -march=mipsel < %s | FileCheck %s
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@data = global [8193 x i32] zeroinitializer
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define void @R(i32 *%p) nounwind {
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entry:
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; CHECK-LABEL: R:
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call void asm sideeffect "lw $$1, $0", "*R,~{$1}"(i32* getelementptr inbounds ([8193 x i32], [8193 x i32]* @data, i32 0, i32 0))
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; CHECK: lw $[[BASEPTR:[0-9]+]], %got(data)(
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; CHECK: #APP
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; CHECK: lw $1, 0($[[BASEPTR]])
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; CHECK: #NO_APP
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ret void
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}
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define void @R_offset_4(i32 *%p) nounwind {
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entry:
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; CHECK-LABEL: R_offset_4:
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call void asm sideeffect "lw $$1, $0", "*R,~{$1}"(i32* getelementptr inbounds ([8193 x i32], [8193 x i32]* @data, i32 0, i32 1))
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; CHECK: lw $[[BASEPTR:[0-9]+]], %got(data)(
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; CHECK: #APP
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; CHECK: lw $1, 4($[[BASEPTR]])
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; CHECK: #NO_APP
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ret void
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}
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define void @R_offset_254(i32 *%p) nounwind {
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entry:
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; CHECK-LABEL: R_offset_254:
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call void asm sideeffect "lw $$1, $0", "*R,~{$1}"(i32* getelementptr inbounds ([8193 x i32], [8193 x i32]* @data, i32 0, i32 63))
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; CHECK-DAG: lw $[[BASEPTR:[0-9]+]], %got(data)(
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; CHECK: #APP
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; CHECK: lw $1, 252($[[BASEPTR]])
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; CHECK: #NO_APP
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ret void
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}
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define void @R_offset_256(i32 *%p) nounwind {
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entry:
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; CHECK-LABEL: R_offset_256:
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call void asm sideeffect "lw $$1, $0", "*R,~{$1}"(i32* getelementptr inbounds ([8193 x i32], [8193 x i32]* @data, i32 0, i32 64))
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; CHECK-DAG: lw $[[BASEPTR:[0-9]+]], %got(data)(
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; CHECK: addiu $[[BASEPTR2:[0-9]+]], $[[BASEPTR]], 256
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; CHECK: #APP
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; CHECK: lw $1, 0($[[BASEPTR2]])
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; CHECK: #NO_APP
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ret void
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}
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