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0a0548042f
We can often fold an ADDI into the offset of load/store instructions: (load (addi base, off1), off2) -> (load base, off1+off2) (store val, (addi base, off1), off2) -> (store val, base, off1+off2) This is possible when the off1+off2 continues to fit the 12-bit immediate. We remove the previous restriction where we would never fold the ADDIs if the load/stores had nonzero offsets. We now do the fold the the resulting constant still fits a 12-bit immediate, or if off1 is a variable's address and we know based on that variable's alignment that off1+offs2 won't overflow. Differential Revision: https://reviews.llvm.org/D79690
94 lines
3.0 KiB
LLVM
94 lines
3.0 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc -mtriple=riscv32 -verify-machineinstrs < %s \
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; RUN: | FileCheck -check-prefix=RV32I %s
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@x = local_unnamed_addr global fp128 0xL00000000000000007FFF000000000000, align 16
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@y = local_unnamed_addr global fp128 0xL00000000000000007FFF000000000000, align 16
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; Besides anything else, these tests help verify that libcall ABI lowering
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; works correctly
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define i32 @test_load_and_cmp() nounwind {
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; RV32I-LABEL: test_load_and_cmp:
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; RV32I: # %bb.0:
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; RV32I-NEXT: addi sp, sp, -48
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; RV32I-NEXT: sw ra, 44(sp)
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; RV32I-NEXT: lui a0, %hi(x)
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; RV32I-NEXT: lw a6, %lo(x)(a0)
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; RV32I-NEXT: lw a7, %lo(x+4)(a0)
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; RV32I-NEXT: lw a3, %lo(x+8)(a0)
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; RV32I-NEXT: lw a0, %lo(x+12)(a0)
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; RV32I-NEXT: lui a4, %hi(y)
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; RV32I-NEXT: lw a5, %lo(y)(a4)
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; RV32I-NEXT: lw a2, %lo(y+4)(a4)
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; RV32I-NEXT: lw a1, %lo(y+8)(a4)
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; RV32I-NEXT: lw a4, %lo(y+12)(a4)
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; RV32I-NEXT: sw a4, 20(sp)
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; RV32I-NEXT: sw a1, 16(sp)
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; RV32I-NEXT: sw a2, 12(sp)
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; RV32I-NEXT: sw a5, 8(sp)
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; RV32I-NEXT: sw a0, 36(sp)
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; RV32I-NEXT: sw a3, 32(sp)
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; RV32I-NEXT: sw a7, 28(sp)
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; RV32I-NEXT: addi a0, sp, 24
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; RV32I-NEXT: addi a1, sp, 8
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; RV32I-NEXT: sw a6, 24(sp)
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; RV32I-NEXT: call __netf2
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; RV32I-NEXT: snez a0, a0
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; RV32I-NEXT: lw ra, 44(sp)
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; RV32I-NEXT: addi sp, sp, 48
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; RV32I-NEXT: ret
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%1 = load fp128, fp128* @x, align 16
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%2 = load fp128, fp128* @y, align 16
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%cmp = fcmp une fp128 %1, %2
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%3 = zext i1 %cmp to i32
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ret i32 %3
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}
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define i32 @test_add_and_fptosi() nounwind {
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; RV32I-LABEL: test_add_and_fptosi:
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; RV32I: # %bb.0:
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; RV32I-NEXT: addi sp, sp, -80
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; RV32I-NEXT: sw ra, 76(sp)
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; RV32I-NEXT: lui a0, %hi(x)
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; RV32I-NEXT: lw a6, %lo(x)(a0)
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; RV32I-NEXT: lw a7, %lo(x+4)(a0)
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; RV32I-NEXT: lw a2, %lo(x+8)(a0)
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; RV32I-NEXT: lw a0, %lo(x+12)(a0)
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; RV32I-NEXT: lui a4, %hi(y)
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; RV32I-NEXT: lw a5, %lo(y)(a4)
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; RV32I-NEXT: lw a3, %lo(y+4)(a4)
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; RV32I-NEXT: lw a1, %lo(y+8)(a4)
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; RV32I-NEXT: lw a4, %lo(y+12)(a4)
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; RV32I-NEXT: sw a4, 36(sp)
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; RV32I-NEXT: sw a1, 32(sp)
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; RV32I-NEXT: sw a3, 28(sp)
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; RV32I-NEXT: sw a5, 24(sp)
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; RV32I-NEXT: sw a0, 52(sp)
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; RV32I-NEXT: sw a2, 48(sp)
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; RV32I-NEXT: sw a7, 44(sp)
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; RV32I-NEXT: addi a0, sp, 56
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; RV32I-NEXT: addi a1, sp, 40
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; RV32I-NEXT: addi a2, sp, 24
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; RV32I-NEXT: sw a6, 40(sp)
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; RV32I-NEXT: call __addtf3
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; RV32I-NEXT: lw a1, 56(sp)
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; RV32I-NEXT: lw a0, 60(sp)
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; RV32I-NEXT: lw a2, 64(sp)
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; RV32I-NEXT: lw a3, 68(sp)
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; RV32I-NEXT: sw a3, 20(sp)
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; RV32I-NEXT: sw a2, 16(sp)
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; RV32I-NEXT: sw a0, 12(sp)
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; RV32I-NEXT: addi a0, sp, 8
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; RV32I-NEXT: sw a1, 8(sp)
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; RV32I-NEXT: call __fixtfsi
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; RV32I-NEXT: lw ra, 76(sp)
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; RV32I-NEXT: addi sp, sp, 80
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; RV32I-NEXT: ret
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%1 = load fp128, fp128* @x, align 16
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%2 = load fp128, fp128* @y, align 16
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%3 = fadd fp128 %1, %2
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%4 = fptosi fp128 %3 to i32
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ret i32 %4
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}
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