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[Mips] Add MipsPat add $gp, (select $cond, tglobaladdr, tglobaladdr) to parse MipsISD::GPRel TargetGlobalAddress #165531

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[Mips] Add MipsPat add $gp, (select $cond, tglobaladdr, tglobaladdr) to parse MipsISD::GPRel TargetGlobalAddress #165531

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09cb0d6
[Mips] Add MipsPat `add $gp, (select $cond, tglobaladdr, tglobaladdr)`
yingopq Oct 29, 2025
5a5f0d8
Merge branch 'main' into Fix_bug_issue_142060
yingopq Oct 29, 2025
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3 changes: 3 additions & 0 deletions llvm/lib/Target/Mips/MipsCondMov.td
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Original file line number Diff line number Diff line change
Expand Up @@ -196,6 +196,9 @@ let AdditionalPredicates = [NotInMicroMips] in {
}

// Instantiation of conditional move patterns.
def : MipsPat<(add GPR64:$gp, (select GPR32:$cond, (MipsGPRel tglobaladdr:$T), (MipsGPRel tglobaladdr:$F))),
(MOVN_I_I64 (i64 (DADDiu GPR64:$gp, tglobaladdr:$T)), GPR32:$cond, (i64 (DADDiu GPR64:$gp, tglobaladdr:$F)))>, ISA_MIPS3, ABI_N64;

defm : MovzPats0<GPR32, GPR32, MOVZ_I_I, SLT, SLTu, SLTi, SLTiu>,
INSN_MIPS4_32_NOT_32R6_64R6;
defm : MovzPats1<GPR32, GPR32, MOVZ_I_I, XOR>, INSN_MIPS4_32_NOT_32R6_64R6;
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22 changes: 22 additions & 0 deletions llvm/test/CodeGen/Mips/llvm-ir/select-globaladdr.ll
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@@ -0,0 +1,22 @@
; RUN: llc < %s -mattr +noabicalls -mgpopt | FileCheck %s -check-prefixes=MIPS64

target datalayout = "E-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128"
target triple = "mips64-unknown-linux-muslabi64"

@.str = external constant [6 x i8]
@.str.1 = external constant [6 x i8]

define ptr @tst_select_ptr_ptr(i1 %tobool.not) {
entry:
; MIPS64-LABEL: tst_select_ptr_ptr:
; MIPS64: # %bb.0: # %entry
; MIPS64: sll $1, $4, 0
; MIPS64: andi $1, $1, 1
; MIPS64: daddiu $2, $gp, %gp_rel(.str)
; MIPS64: daddiu $3, $gp, %gp_rel(.str.1)
; MIPS64: jr $ra
; MIPS64: movn $2, $3, $1

%cond = select i1 %tobool.not, ptr @.str.1, ptr @.str
ret ptr %cond
}