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876dc10c73
A linker optimization is available on PowerPC for GOT indirect PCRelative loads. The idea is that we can mark a usual GOT indirect load: pld 3, vec@got@pcrel(0), 1 lwa 3, 4(3) With a relocation to say that if we don't need to go through the GOT we can let the linker further optimize this and replace a load with a nop. pld 3, vec@got@pcrel(0), 1 .Lpcrel1: .reloc .Lpcrel1-8,R_PPC64_PCREL_OPT,.-(.Lpcrel1-8) lwa 3, 4(3) This patch adds the logic that allows the compiler to add the R_PPC64_PCREL_OPT. Reviewers: nemanjai, lei, hfinkel, sfertile, efriedma, tstellar, grosbach Reviewed By: nemanjai Differential Revision: https://reviews.llvm.org/D79864
415 lines
12 KiB
LLVM
415 lines
12 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc -verify-machineinstrs -mtriple=powerpc64le-unknown-linux-gnu \
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; RUN: -mcpu=pwr10 -ppc-asm-full-reg-names -ppc-vsr-nums-as-vr < %s \
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; RUN: | FileCheck %s --check-prefix=LE
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; RUN: llc -verify-machineinstrs -target-abi=elfv2 -mtriple=powerpc64-- \
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; RUN: -mcpu=pwr10 -ppc-asm-full-reg-names -ppc-vsr-nums-as-vr < %s \
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; RUN: | FileCheck %s --check-prefix=BE
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%struct.Struct = type { i8, i16, i32 }
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@valChar = external local_unnamed_addr global i8, align 1
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@valShort = external local_unnamed_addr global i16, align 2
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@valInt = external global i32, align 4
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@valUnsigned = external local_unnamed_addr global i32, align 4
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@valLong = external local_unnamed_addr global i64, align 8
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@ptr = external local_unnamed_addr global i32*, align 8
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@array = external local_unnamed_addr global [10 x i32], align 4
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@structure = external local_unnamed_addr global %struct.Struct, align 4
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@ptrfunc = external local_unnamed_addr global void (...)*, align 8
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define dso_local signext i32 @ReadGlobalVarChar() local_unnamed_addr {
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; LE-LABEL: ReadGlobalVarChar:
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; LE: # %bb.0: # %entry
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; LE-NEXT: pld r3, valChar@got@pcrel(0), 1
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; LE-NEXT: .Lpcrel:
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; LE-NEXT: .reloc .Lpcrel-8,R_PPC64_PCREL_OPT,.-(.Lpcrel-8)
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; LE-NEXT: lbz r3, 0(r3)
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; LE-NEXT: blr
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;
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; BE-LABEL: ReadGlobalVarChar:
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; BE: # %bb.0: # %entry
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; BE-NEXT: pld r3, valChar@got@pcrel(0), 1
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; BE-NEXT: .Lpcrel:
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; BE-NEXT: .reloc .Lpcrel-8,R_PPC64_PCREL_OPT,.-(.Lpcrel-8)
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; BE-NEXT: lbz r3, 0(r3)
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; BE-NEXT: blr
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entry:
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%0 = load i8, i8* @valChar, align 1
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%conv = zext i8 %0 to i32
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ret i32 %conv
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}
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define dso_local void @WriteGlobalVarChar() local_unnamed_addr {
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; LE-LABEL: WriteGlobalVarChar:
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; LE: # %bb.0: # %entry
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; LE-NEXT: pld r3, valChar@got@pcrel(0), 1
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; LE-NEXT: li r4, 3
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; LE-NEXT: stb r4, 0(r3)
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; LE-NEXT: blr
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;
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; BE-LABEL: WriteGlobalVarChar:
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; BE: # %bb.0: # %entry
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; BE-NEXT: pld r3, valChar@got@pcrel(0), 1
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; BE-NEXT: li r4, 3
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; BE-NEXT: stb r4, 0(r3)
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; BE-NEXT: blr
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entry:
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store i8 3, i8* @valChar, align 1
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ret void
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}
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define dso_local signext i32 @ReadGlobalVarShort() local_unnamed_addr {
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; LE-LABEL: ReadGlobalVarShort:
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; LE: # %bb.0: # %entry
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; LE-NEXT: pld r3, valShort@got@pcrel(0), 1
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; LE-NEXT: .Lpcrel0:
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; LE-NEXT: .reloc .Lpcrel0-8,R_PPC64_PCREL_OPT,.-(.Lpcrel0-8)
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; LE-NEXT: lha r3, 0(r3)
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; LE-NEXT: blr
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;
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; BE-LABEL: ReadGlobalVarShort:
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; BE: # %bb.0: # %entry
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; BE-NEXT: pld r3, valShort@got@pcrel(0), 1
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; BE-NEXT: .Lpcrel0:
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; BE-NEXT: .reloc .Lpcrel0-8,R_PPC64_PCREL_OPT,.-(.Lpcrel0-8)
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; BE-NEXT: lha r3, 0(r3)
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; BE-NEXT: blr
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entry:
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%0 = load i16, i16* @valShort, align 2
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%conv = sext i16 %0 to i32
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ret i32 %conv
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}
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define dso_local void @WriteGlobalVarShort() local_unnamed_addr {
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; LE-LABEL: WriteGlobalVarShort:
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; LE: # %bb.0: # %entry
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; LE-NEXT: pld r3, valShort@got@pcrel(0), 1
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; LE-NEXT: li r4, 3
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; LE-NEXT: sth r4, 0(r3)
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; LE-NEXT: blr
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;
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; BE-LABEL: WriteGlobalVarShort:
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; BE: # %bb.0: # %entry
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; BE-NEXT: pld r3, valShort@got@pcrel(0), 1
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; BE-NEXT: li r4, 3
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; BE-NEXT: sth r4, 0(r3)
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; BE-NEXT: blr
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entry:
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store i16 3, i16* @valShort, align 2
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ret void
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}
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define dso_local signext i32 @ReadGlobalVarInt() local_unnamed_addr {
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; LE-LABEL: ReadGlobalVarInt:
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; LE: # %bb.0: # %entry
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; LE-NEXT: pld r3, valInt@got@pcrel(0), 1
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; LE-NEXT: .Lpcrel1:
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; LE-NEXT: .reloc .Lpcrel1-8,R_PPC64_PCREL_OPT,.-(.Lpcrel1-8)
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; LE-NEXT: lwa r3, 0(r3)
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; LE-NEXT: blr
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;
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; BE-LABEL: ReadGlobalVarInt:
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; BE: # %bb.0: # %entry
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; BE-NEXT: pld r3, valInt@got@pcrel(0), 1
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; BE-NEXT: .Lpcrel1:
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; BE-NEXT: .reloc .Lpcrel1-8,R_PPC64_PCREL_OPT,.-(.Lpcrel1-8)
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; BE-NEXT: lwa r3, 0(r3)
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; BE-NEXT: blr
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entry:
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%0 = load i32, i32* @valInt, align 4
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ret i32 %0
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}
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define dso_local void @WriteGlobalVarInt() local_unnamed_addr {
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; LE-LABEL: WriteGlobalVarInt:
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; LE: # %bb.0: # %entry
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; LE-NEXT: pld r3, valInt@got@pcrel(0), 1
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; LE-NEXT: li r4, 33
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; LE-NEXT: stw r4, 0(r3)
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; LE-NEXT: blr
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;
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; BE-LABEL: WriteGlobalVarInt:
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; BE: # %bb.0: # %entry
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; BE-NEXT: pld r3, valInt@got@pcrel(0), 1
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; BE-NEXT: li r4, 33
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; BE-NEXT: stw r4, 0(r3)
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; BE-NEXT: blr
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entry:
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store i32 33, i32* @valInt, align 4
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ret void
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}
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define dso_local signext i32 @ReadGlobalVarUnsigned() local_unnamed_addr {
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; LE-LABEL: ReadGlobalVarUnsigned:
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; LE: # %bb.0: # %entry
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; LE-NEXT: pld r3, valUnsigned@got@pcrel(0), 1
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; LE-NEXT: .Lpcrel2:
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; LE-NEXT: .reloc .Lpcrel2-8,R_PPC64_PCREL_OPT,.-(.Lpcrel2-8)
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; LE-NEXT: lwa r3, 0(r3)
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; LE-NEXT: blr
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;
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; BE-LABEL: ReadGlobalVarUnsigned:
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; BE: # %bb.0: # %entry
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; BE-NEXT: pld r3, valUnsigned@got@pcrel(0), 1
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; BE-NEXT: .Lpcrel2:
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; BE-NEXT: .reloc .Lpcrel2-8,R_PPC64_PCREL_OPT,.-(.Lpcrel2-8)
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; BE-NEXT: lwa r3, 0(r3)
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; BE-NEXT: blr
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entry:
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%0 = load i32, i32* @valUnsigned, align 4
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ret i32 %0
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}
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define dso_local void @WriteGlobalVarUnsigned() local_unnamed_addr {
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; LE-LABEL: WriteGlobalVarUnsigned:
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; LE: # %bb.0: # %entry
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; LE-NEXT: pld r3, valUnsigned@got@pcrel(0), 1
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; LE-NEXT: li r4, 33
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; LE-NEXT: stw r4, 0(r3)
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; LE-NEXT: blr
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;
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; BE-LABEL: WriteGlobalVarUnsigned:
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; BE: # %bb.0: # %entry
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; BE-NEXT: pld r3, valUnsigned@got@pcrel(0), 1
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; BE-NEXT: li r4, 33
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; BE-NEXT: stw r4, 0(r3)
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; BE-NEXT: blr
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entry:
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store i32 33, i32* @valUnsigned, align 4
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ret void
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}
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define dso_local signext i32 @ReadGlobalVarLong() local_unnamed_addr {
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; LE-LABEL: ReadGlobalVarLong:
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; LE: # %bb.0: # %entry
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; LE-NEXT: pld r3, valLong@got@pcrel(0), 1
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; LE-NEXT: .Lpcrel3:
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; LE-NEXT: .reloc .Lpcrel3-8,R_PPC64_PCREL_OPT,.-(.Lpcrel3-8)
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; LE-NEXT: lwa r3, 0(r3)
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; LE-NEXT: blr
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;
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; BE-LABEL: ReadGlobalVarLong:
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; BE: # %bb.0: # %entry
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; BE-NEXT: pld r3, valLong@got@pcrel(0), 1
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; BE-NEXT: .Lpcrel3:
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; BE-NEXT: .reloc .Lpcrel3-8,R_PPC64_PCREL_OPT,.-(.Lpcrel3-8)
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; BE-NEXT: lwa r3, 4(r3)
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; BE-NEXT: blr
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entry:
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%0 = load i64, i64* @valLong, align 8
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%conv = trunc i64 %0 to i32
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ret i32 %conv
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}
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define dso_local void @WriteGlobalVarLong() local_unnamed_addr {
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; LE-LABEL: WriteGlobalVarLong:
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; LE: # %bb.0: # %entry
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; LE-NEXT: pld r3, valLong@got@pcrel(0), 1
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; LE-NEXT: li r4, 3333
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; LE-NEXT: std r4, 0(r3)
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; LE-NEXT: blr
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;
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; BE-LABEL: WriteGlobalVarLong:
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; BE: # %bb.0: # %entry
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; BE-NEXT: pld r3, valLong@got@pcrel(0), 1
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; BE-NEXT: li r4, 3333
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; BE-NEXT: std r4, 0(r3)
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; BE-NEXT: blr
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entry:
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store i64 3333, i64* @valLong, align 8
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ret void
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}
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define dso_local i32* @ReadGlobalPtr() local_unnamed_addr {
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; LE-LABEL: ReadGlobalPtr:
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; LE: # %bb.0: # %entry
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; LE-NEXT: pld r3, ptr@got@pcrel(0), 1
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; LE-NEXT: .Lpcrel4:
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; LE-NEXT: .reloc .Lpcrel4-8,R_PPC64_PCREL_OPT,.-(.Lpcrel4-8)
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; LE-NEXT: ld r3, 0(r3)
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; LE-NEXT: blr
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;
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; BE-LABEL: ReadGlobalPtr:
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; BE: # %bb.0: # %entry
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; BE-NEXT: pld r3, ptr@got@pcrel(0), 1
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; BE-NEXT: .Lpcrel4:
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; BE-NEXT: .reloc .Lpcrel4-8,R_PPC64_PCREL_OPT,.-(.Lpcrel4-8)
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; BE-NEXT: ld r3, 0(r3)
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; BE-NEXT: blr
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entry:
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%0 = load i32*, i32** @ptr, align 8
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ret i32* %0
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}
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define dso_local void @WriteGlobalPtr() local_unnamed_addr {
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; LE-LABEL: WriteGlobalPtr:
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; LE: # %bb.0: # %entry
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; LE-NEXT: pld r3, ptr@got@pcrel(0), 1
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; LE-NEXT: .Lpcrel5:
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; LE-NEXT: li r4, 3
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; LE-NEXT: .reloc .Lpcrel5-8,R_PPC64_PCREL_OPT,.-(.Lpcrel5-8)
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; LE-NEXT: ld r3, 0(r3)
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; LE-NEXT: stw r4, 0(r3)
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; LE-NEXT: blr
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;
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; BE-LABEL: WriteGlobalPtr:
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; BE: # %bb.0: # %entry
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; BE-NEXT: pld r3, ptr@got@pcrel(0), 1
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; BE-NEXT: .Lpcrel5:
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; BE-NEXT: li r4, 3
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; BE-NEXT: .reloc .Lpcrel5-8,R_PPC64_PCREL_OPT,.-(.Lpcrel5-8)
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; BE-NEXT: ld r3, 0(r3)
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; BE-NEXT: stw r4, 0(r3)
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; BE-NEXT: blr
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entry:
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%0 = load i32*, i32** @ptr, align 8
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store i32 3, i32* %0, align 4
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ret void
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}
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define dso_local nonnull i32* @GlobalVarAddr() local_unnamed_addr {
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; LE-LABEL: GlobalVarAddr:
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; LE: # %bb.0: # %entry
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; LE-NEXT: pld r3, valInt@got@pcrel(0), 1
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; LE-NEXT: blr
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;
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; BE-LABEL: GlobalVarAddr:
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; BE: # %bb.0: # %entry
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; BE-NEXT: pld r3, valInt@got@pcrel(0), 1
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; BE-NEXT: blr
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entry:
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ret i32* @valInt
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}
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define dso_local signext i32 @ReadGlobalArray() local_unnamed_addr {
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; LE-LABEL: ReadGlobalArray:
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; LE: # %bb.0: # %entry
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; LE-NEXT: pld r3, array@got@pcrel(0), 1
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; LE-NEXT: .Lpcrel6:
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; LE-NEXT: .reloc .Lpcrel6-8,R_PPC64_PCREL_OPT,.-(.Lpcrel6-8)
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; LE-NEXT: lwa r3, 12(r3)
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; LE-NEXT: blr
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;
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; BE-LABEL: ReadGlobalArray:
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; BE: # %bb.0: # %entry
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; BE-NEXT: pld r3, array@got@pcrel(0), 1
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; BE-NEXT: .Lpcrel6:
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; BE-NEXT: .reloc .Lpcrel6-8,R_PPC64_PCREL_OPT,.-(.Lpcrel6-8)
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; BE-NEXT: lwa r3, 12(r3)
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; BE-NEXT: blr
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entry:
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%0 = load i32, i32* getelementptr inbounds ([10 x i32], [10 x i32]* @array, i64 0, i64 3), align 4
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ret i32 %0
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}
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define dso_local void @WriteGlobalArray() local_unnamed_addr {
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; LE-LABEL: WriteGlobalArray:
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; LE: # %bb.0: # %entry
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; LE-NEXT: pld r3, array@got@pcrel(0), 1
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; LE-NEXT: li r4, 5
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; LE-NEXT: stw r4, 12(r3)
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; LE-NEXT: blr
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;
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; BE-LABEL: WriteGlobalArray:
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; BE: # %bb.0: # %entry
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; BE-NEXT: pld r3, array@got@pcrel(0), 1
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; BE-NEXT: li r4, 5
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; BE-NEXT: stw r4, 12(r3)
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; BE-NEXT: blr
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entry:
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store i32 5, i32* getelementptr inbounds ([10 x i32], [10 x i32]* @array, i64 0, i64 3), align 4
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ret void
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}
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define dso_local signext i32 @ReadGlobalStruct() local_unnamed_addr {
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; LE-LABEL: ReadGlobalStruct:
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; LE: # %bb.0: # %entry
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; LE-NEXT: pld r3, structure@got@pcrel(0), 1
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; LE-NEXT: .Lpcrel7:
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; LE-NEXT: .reloc .Lpcrel7-8,R_PPC64_PCREL_OPT,.-(.Lpcrel7-8)
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; LE-NEXT: lwa r3, 4(r3)
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; LE-NEXT: blr
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;
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; BE-LABEL: ReadGlobalStruct:
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; BE: # %bb.0: # %entry
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; BE-NEXT: pld r3, structure@got@pcrel(0), 1
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; BE-NEXT: .Lpcrel7:
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; BE-NEXT: .reloc .Lpcrel7-8,R_PPC64_PCREL_OPT,.-(.Lpcrel7-8)
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; BE-NEXT: lwa r3, 4(r3)
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; BE-NEXT: blr
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entry:
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%0 = load i32, i32* getelementptr inbounds (%struct.Struct, %struct.Struct* @structure, i64 0, i32 2), align 4
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ret i32 %0
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}
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define dso_local void @WriteGlobalStruct() local_unnamed_addr {
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; LE-LABEL: WriteGlobalStruct:
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; LE: # %bb.0: # %entry
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; LE-NEXT: pld r3, structure@got@pcrel(0), 1
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; LE-NEXT: li r4, 3
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; LE-NEXT: stw r4, 4(r3)
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; LE-NEXT: blr
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;
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; BE-LABEL: WriteGlobalStruct:
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; BE: # %bb.0: # %entry
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; BE-NEXT: pld r3, structure@got@pcrel(0), 1
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; BE-NEXT: li r4, 3
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; BE-NEXT: stw r4, 4(r3)
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; BE-NEXT: blr
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entry:
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store i32 3, i32* getelementptr inbounds (%struct.Struct, %struct.Struct* @structure, i64 0, i32 2), align 4
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ret void
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}
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define dso_local void @ReadFuncPtr() local_unnamed_addr {
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; LE-LABEL: ReadFuncPtr:
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; LE: .localentry ReadFuncPtr, 1
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; LE-NEXT: # %bb.0: # %entry
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; LE-NEXT: pld r3, ptrfunc@got@pcrel(0), 1
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; LE-NEXT: .Lpcrel8:
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; LE-NEXT: .reloc .Lpcrel8-8,R_PPC64_PCREL_OPT,.-(.Lpcrel8-8)
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; LE-NEXT: ld r12, 0(r3)
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; LE-NEXT: mtctr r12
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; LE-NEXT: bctr
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; LE-NEXT: #TC_RETURNr8 ctr 0
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;
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; BE-LABEL: ReadFuncPtr:
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; BE: .localentry ReadFuncPtr, 1
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; BE-NEXT: # %bb.0: # %entry
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; BE-NEXT: pld r3, ptrfunc@got@pcrel(0), 1
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; BE-NEXT: .Lpcrel8:
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; BE-NEXT: .reloc .Lpcrel8-8,R_PPC64_PCREL_OPT,.-(.Lpcrel8-8)
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; BE-NEXT: ld r12, 0(r3)
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; BE-NEXT: mtctr r12
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; BE-NEXT: bctr
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; BE-NEXT: #TC_RETURNr8 ctr 0
|
|
entry:
|
|
%0 = load void ()*, void ()** bitcast (void (...)** @ptrfunc to void ()**), align 8
|
|
tail call void %0()
|
|
ret void
|
|
}
|
|
|
|
define dso_local void @WriteFuncPtr() local_unnamed_addr {
|
|
; LE-LABEL: WriteFuncPtr:
|
|
; LE: # %bb.0: # %entry
|
|
; LE-NEXT: pld r3, ptrfunc@got@pcrel(0), 1
|
|
; LE-NEXT: pld r4, function@got@pcrel(0), 1
|
|
; LE-NEXT: std r4, 0(r3)
|
|
; LE-NEXT: blr
|
|
;
|
|
; BE-LABEL: WriteFuncPtr:
|
|
; BE: # %bb.0: # %entry
|
|
; BE-NEXT: pld r3, ptrfunc@got@pcrel(0), 1
|
|
; BE-NEXT: pld r4, function@got@pcrel(0), 1
|
|
; BE-NEXT: std r4, 0(r3)
|
|
; BE-NEXT: blr
|
|
entry:
|
|
store void (...)* @function, void (...)** @ptrfunc, align 8
|
|
ret void
|
|
}
|
|
|
|
declare void @function(...)
|
|
|