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b69f1904be
This is an optimization that applies to global addresses and allows for the following transformation: Convert this: paddi r3, 0, symbol@PCREL, 1 ld r4, 8(r3) To this: pld r4, symbol@PCREL+8(0), 1 An instruction is saved and the linker can do the addition when the symbol is resolved. Differential Revision: https://reviews.llvm.org/D76160
74 lines
3.0 KiB
LLVM
74 lines
3.0 KiB
LLVM
; RUN: llc -verify-machineinstrs -mtriple=powerpc64le-unknown-linux-gnu \
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; RUN: -mcpu=future -ppc-asm-full-reg-names -ppc-vsr-nums-as-vr < %s | \
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; RUN: FileCheck %s --check-prefix=CHECK-S
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; RUN: llc -verify-machineinstrs -mtriple=powerpc64le-unknown-linux-gnu \
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; RUN: -mcpu=future -ppc-asm-full-reg-names -ppc-vsr-nums-as-vr \
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; RUN: --filetype=obj < %s | \
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; RUN: llvm-objdump --mcpu=future -dr - | FileCheck %s --check-prefix=CHECK-O
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@array1 = external local_unnamed_addr global [10 x i32], align 4
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@array2 = common dso_local local_unnamed_addr global [10 x i32] zeroinitializer, align 4
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define dso_local signext i32 @getElementLocal7() local_unnamed_addr {
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; CHECK-S-LABEL: getElementLocal7:
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; CHECK-S: # %bb.0: # %entry
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; CHECK-S-NEXT: plwa r3, array2@PCREL+28(0), 1
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; CHECK-S-NEXT: blr
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; CHECK-O-LABEL: <getElementLocal7>:
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; CHECK-O: 00 00 10 04 1c 00 60 a4 plwa 3, 28(0), 1
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; CHECK-O-NEXT: 0000000000000000: R_PPC64_PCREL34 array2+0x1c
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; CHECK-O-NEXT: 20 00 80 4e blr
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entry:
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%0 = load i32, i32* getelementptr inbounds ([10 x i32], [10 x i32]* @array2, i64 0, i64 7), align 4
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ret i32 %0
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}
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define dso_local signext i32 @getElementLocalNegative() local_unnamed_addr {
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; CHECK-S-LABEL: getElementLocalNegative:
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; CHECK-S: # %bb.0: # %entry
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; CHECK-S-NEXT: plwa r3, array2@PCREL-8(0), 1
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; CHECK-S-NEXT: blr
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; CHECK-O-LABEL: <getElementLocalNegative>:
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; CHECK-O: ff ff 13 04 f8 ff 60 a4 plwa 3, -8(0), 1
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; CHECK-O-NEXT: 0000000000000020: R_PPC64_PCREL34 array2-0x8
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; CHECK-O-NEXT: 20 00 80 4e blr
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entry:
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%0 = load i32, i32* getelementptr inbounds ([10 x i32], [10 x i32]* @array2, i64 0, i64 -2), align 4
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ret i32 %0
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}
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define dso_local signext i32 @getElementExtern4() local_unnamed_addr {
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; CHECK-S-LABEL: getElementExtern4:
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; CHECK-S: # %bb.0: # %entry
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; CHECK-S-NEXT: pld r3, array1@got@pcrel(0), 1
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; CHECK-S-NEXT: lwa r3, 16(r3)
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; CHECK-S-NEXT: blr
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; CHECK-O-LABEL: <getElementExtern4>:
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; CHECK-O: 00 00 10 04 00 00 60 e4 pld 3, 0(0), 1
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; CHECK-O-NEXT: 0000000000000040: R_PPC64_GOT_PCREL34 array1
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; CHECK-O-NEXT: 12 00 63 e8 lwa 3, 16(3)
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; CHECK-O-NEXT: 20 00 80 4e blr
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entry:
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%0 = load i32, i32* getelementptr inbounds ([10 x i32], [10 x i32]* @array1, i64 0, i64 4), align 4
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ret i32 %0
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}
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define dso_local signext i32 @getElementExternNegative() local_unnamed_addr {
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; CHECK-S-LABEL: getElementExternNegative:
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; CHECK-S: # %bb.0: # %entry
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; CHECK-S-NEXT: pld r3, array1@got@pcrel(0), 1
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; CHECK-S-NEXT: lwa r3, -4(r3)
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; CHECK-S-NEXT: blr
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; CHECK-O-LABEL: <getElementExternNegative>:
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; CHECK-O: 00 00 10 04 00 00 60 e4 pld 3, 0(0), 1
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; CHECK-O-NEXT: 0000000000000060: R_PPC64_GOT_PCREL34 array1
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; CHECK-O-NEXT: fe ff 63 e8 lwa 3, -4(3)
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; CHECK-O-NEXT: 20 00 80 4e blr
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entry:
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%0 = load i32, i32* getelementptr inbounds ([10 x i32], [10 x i32]* @array1, i64 0, i64 -1), align 4
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ret i32 %0
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}
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