mirror of
https://github.com/RPCS3/llvm.git
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3ec6e52a80
Summary: When @llvm.returnaddress is called with a value higher than 0 it needs to read from the call stack to get the return address. This means that the register windows needs to be flushed to the stack to guarantee that the data read is valid. For values higher than 1 this is done indirectly by the call to getFRAMEADDR(), but not for the value 1. Reviewers: jyknight, venkatra Reviewed By: jyknight Subscribers: fedor.sergeev, jrtc27, llvm-commits Differential Revision: https://reviews.llvm.org/D48636 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@340003 91177308-0d34-0410-b5e6-96231b3b80d8
118 lines
2.6 KiB
LLVM
118 lines
2.6 KiB
LLVM
;RUN: llc -march=sparc -show-mc-encoding < %s | FileCheck %s -check-prefix=V8
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;RUN: llc -march=sparc -mattr=v9 < %s | FileCheck %s -check-prefix=V9
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;RUN: llc -march=sparc -show-mc-encoding -regalloc=basic < %s | FileCheck %s -check-prefix=V8
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;RUN: llc -march=sparc -regalloc=basic -mattr=v9 < %s | FileCheck %s -check-prefix=V9
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;RUN: llc -march=sparcv9 < %s | FileCheck %s -check-prefix=SPARC64
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define i8* @frameaddr() nounwind readnone {
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entry:
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;V8-LABEL: frameaddr:
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;V8: save %sp, -96, %sp
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;V8: ret
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;V8: restore %g0, %fp, %o0
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;V9-LABEL: frameaddr:
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;V9: save %sp, -96, %sp
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;V9: ret
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;V9: restore %g0, %fp, %o0
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;SPARC64-LABEL: frameaddr
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;SPARC64: save %sp, -128, %sp
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;SPARC64: add %fp, 2047, %i0
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;SPARC64: ret
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;SPARC64-NOT: restore %g0, %g0, %g0
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;SPARC64: restore
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%0 = tail call i8* @llvm.frameaddress(i32 0)
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ret i8* %0
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}
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define i8* @frameaddr2() nounwind readnone {
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entry:
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;V8-LABEL: frameaddr2:
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;V8: ta 3 ! encoding: [0x91,0xd0,0x20,0x03]
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;V8: ld [%fp+56], {{.+}}
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;V8: ld [{{.+}}+56], {{.+}}
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;V8: ld [{{.+}}+56], {{.+}}
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;V9-LABEL: frameaddr2:
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;V9: flushw
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;V9: ld [%fp+56], {{.+}}
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;V9: ld [{{.+}}+56], {{.+}}
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;V9: ld [{{.+}}+56], {{.+}}
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;SPARC64-LABEL: frameaddr2
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;SPARC64: flushw
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;SPARC64: ldx [%fp+2159], %[[R0:[goli][0-7]]]
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;SPARC64: ldx [%[[R0]]+2159], %[[R1:[goli][0-7]]]
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;SPARC64: ldx [%[[R1]]+2159], %[[R2:[goli][0-7]]]
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;SPARC64: add %[[R2]], 2047, {{.+}}
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%0 = tail call i8* @llvm.frameaddress(i32 3)
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ret i8* %0
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}
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declare i8* @llvm.frameaddress(i32) nounwind readnone
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define i8* @retaddr() nounwind readnone {
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entry:
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;V8-LABEL: retaddr:
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;V8: mov %o7, {{.+}}
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;V9-LABEL: retaddr:
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;V9: mov %o7, {{.+}}
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;SPARC64-LABEL: retaddr
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;SPARC64: mov %o7, {{.+}}
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%0 = tail call i8* @llvm.returnaddress(i32 0)
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ret i8* %0
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}
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define i8* @retaddr2() nounwind readnone {
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entry:
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;V8-LABEL: retaddr2:
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;V8: ta 3
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;V8: ld [%fp+56], {{.+}}
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;V8: ld [{{.+}}+56], {{.+}}
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;V8: ld [{{.+}}+60], {{.+}}
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;V9-LABEL: retaddr2:
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;V9: flushw
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;V9: ld [%fp+56], {{.+}}
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;V9: ld [{{.+}}+56], {{.+}}
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;V9: ld [{{.+}}+60], {{.+}}
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;SPARC64-LABEL: retaddr2
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;SPARC64: flushw
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;SPARC64: ldx [%fp+2159], %[[R0:[goli][0-7]]]
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;SPARC64: ldx [%[[R0]]+2159], %[[R1:[goli][0-7]]]
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;SPARC64: ldx [%[[R1]]+2167], {{.+}}
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%0 = tail call i8* @llvm.returnaddress(i32 3)
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ret i8* %0
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}
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define i8* @retaddr3() nounwind readnone {
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entry:
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;V8-LABEL: retaddr3:
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;V8: ta 3
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;V8: ld [%fp+60], {{.+}}
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;V9-LABEL: retaddr3:
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;V9: flushw
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;V9: ld [%fp+60], {{.+}}
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;SPARC64-LABEL: retaddr3
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;SPARC64: flushw
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;SPARC64: ldx [%fp+2167], %[[R0:[goli][0-7]]]
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%0 = tail call i8* @llvm.returnaddress(i32 1)
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ret i8* %0
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}
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declare i8* @llvm.returnaddress(i32) nounwind readnone
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