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This requires a knowledge of the stack size which is not known until the frame is complete, hence the need for the XCoreFTAOElim pass which lowers the XCoreISD::FRAME_TO_ARGS_OFFSET instrution into its final form. llvm-svn: 198614
73 lines
1.5 KiB
LLVM
73 lines
1.5 KiB
LLVM
; RUN: llc < %s -march=xcore | FileCheck %s
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declare i8* @llvm.frameaddress(i32) nounwind readnone
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define i8* @FA0() nounwind {
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entry:
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; CHECK-LABEL: FA0
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; CHECK: ldaw r0, sp[0]
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; CHECK-NEXT: retsp 0
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%0 = call i8* @llvm.frameaddress(i32 0)
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ret i8* %0
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}
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define i8* @FA1() nounwind {
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entry:
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; CHECK-LABEL: FA1
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; CHECK: entsp 100
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; CHECK-NEXT: ldaw r0, sp[0]
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; CHECK-NEXT: retsp 100
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%0 = alloca [100 x i32]
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%1 = call i8* @llvm.frameaddress(i32 0)
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ret i8* %1
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}
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declare i8* @llvm.returnaddress(i32) nounwind readnone
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define i8* @RA0() nounwind {
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entry:
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; CHECK-LABEL: RA0
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; CHECK: stw lr, sp[0]
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; CHECK-NEXT: ldw r0, sp[0]
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; CHECK-NEXT: ldw lr, sp[0]
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; CHECK-NEXT: retsp 0
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%0 = call i8* @llvm.returnaddress(i32 0)
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ret i8* %0
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}
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define i8* @RA1() nounwind {
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entry:
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; CHECK-LABEL: RA1
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; CHECK: entsp 100
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; CHECK-NEXT: ldw r0, sp[100]
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; CHECK-NEXT: retsp 100
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%0 = alloca [100 x i32]
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%1 = call i8* @llvm.returnaddress(i32 0)
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ret i8* %1
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}
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; test FRAME_TO_ARGS_OFFSET lowering
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declare i8* @llvm.eh.dwarf.cfa(i32) nounwind
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define i8* @FTAO0() nounwind {
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entry:
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; CHECK-LABEL: FTAO0
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; CHECK: ldc r0, 0
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; CHECK-NEXT: ldaw r1, sp[0]
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; CHECK-NEXT: add r0, r1, r0
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; CHECK-NEXT: retsp 0
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%0 = call i8* @llvm.eh.dwarf.cfa(i32 0)
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ret i8* %0
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}
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define i8* @FTAO1() nounwind {
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entry:
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; CHECK-LABEL: FTAO1
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; CHECK: entsp 100
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; CHECK-NEXT: ldc r0, 400
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; CHECK-NEXT: ldaw r1, sp[0]
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; CHECK-NEXT: add r0, r1, r0
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; CHECK-NEXT: retsp 100
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%0 = alloca [100 x i32]
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%1 = call i8* @llvm.eh.dwarf.cfa(i32 0)
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ret i8* %1
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}
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