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a36268215f
This changes TargetFrameLowering::processFunctionBeforeCalleeSavedScan(): - Rename the function to determineCalleeSaves() - Pass a bitset of callee saved registers by reference, thus avoiding the function-global PhysRegUsed bitset in MachineRegisterInfo. - Without PhysRegUsed the implementation is fine tuned to not save physcial registers which are only read but never modified. Related to rdar://21539507 Differential Revision: http://reviews.llvm.org/D10909 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@242165 91177308-0d34-0410-b5e6-96231b3b80d8
27 lines
722 B
LLVM
27 lines
722 B
LLVM
; RUN: llc < %s -mtriple=arm-apple-ios | FileCheck %s
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; RUN: llc < %s -mtriple=thumbv6-apple-ios | FileCheck %s
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; RUN: llc < %s -mtriple=arm-apple-ios -regalloc=basic | FileCheck %s
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; RUN: llc < %s -mtriple=thumbv6-apple-ios -regalloc=basic | FileCheck %s
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; rdar://8015977
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; rdar://8020118
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define i8* @rt0(i32 %x) nounwind readnone {
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entry:
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; CHECK-LABEL: rt0:
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; CHECK: mov r0, lr
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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* @rt2() nounwind readnone {
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entry:
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; CHECK-LABEL: rt2:
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; CHECK: ldr r[[R0:[0-9]+]], [r7]
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; CHECK: ldr r0, [r[[R0]]]
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; CHECK: ldr r0, [r[[R0]], #4]
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%0 = tail call i8* @llvm.returnaddress(i32 2)
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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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