mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-23 11:13:28 +01:00
8541a94229
Summary: In Thumb2's frame index rewriting process, the address mode i8s4, which is used by LDRD and STRD instructions, is handled by taking the immediate offset operand and multiplying it by 4. This behaviour is wrong, however. In this specific address mode, the MachineInstr's immediate operand is already in the expected form. By consequence of that, multiplying it once more by 4 yields a flawed offset value, four times greater than it should be. Differential Revision: https://reviews.llvm.org/D80557
45 lines
1.9 KiB
YAML
45 lines
1.9 KiB
YAML
# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
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# RUN: llc -o - %s -mtriple=thumbv8.1m.main-none-none-eabi -run-pass=prologepilog | FileCheck %s
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--- |
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; Function Attrs: noinline nounwind optnone
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define dso_local i64 @f() #0 {
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entry:
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%a = alloca [10 x i64], align 8
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%arrayidx = getelementptr inbounds [10 x i64], [10 x i64]* %a, i32 0, i32 1
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store volatile i64 1, i64* %arrayidx, align 8
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%arrayidx1 = getelementptr inbounds [10 x i64], [10 x i64]* %a, i32 0, i32 1
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%0 = load volatile i64, i64* %arrayidx1, align 8
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ret i64 %0
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}
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...
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---
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name: f
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alignment: 2
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tracksRegLiveness: true
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frameInfo:
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maxAlignment: 8
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maxCallFrameSize: 0
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localFrameSize: 80
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stack:
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- { id: 0, name: a, size: 80, alignment: 8, local-offset: -80 }
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machineFunctionInfo: {}
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body: |
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bb.0.entry:
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; CHECK-LABEL: name: f
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; CHECK: $sp = frame-setup tSUBspi $sp, 20, 14 /* CC::al */, $noreg
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; CHECK: frame-setup CFI_INSTRUCTION def_cfa_offset 80
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; CHECK: renamable $r0 = t2MOVi 0, 14 /* CC::al */, $noreg, $noreg
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; CHECK: renamable $r1 = t2MOVi 1, 14 /* CC::al */, $noreg, $noreg
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; CHECK: t2STRDi8 killed $r1, killed $r0, $sp, 8, 14 /* CC::al */, $noreg :: (volatile store 8 into %ir.arrayidx)
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; CHECK: $r0, $r1 = t2LDRDi8 $sp, 8, 14 /* CC::al */, $noreg :: (volatile dereferenceable load 8 from %ir.arrayidx1)
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; CHECK: $sp = frame-destroy tADDspi $sp, 20, 14 /* CC::al */, $noreg
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; CHECK: tBX_RET 14 /* CC::al */, $noreg, implicit $r0, implicit $r1
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renamable $r0 = t2MOVi 0, 14 /* CC::al */, $noreg, $noreg
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renamable $r1 = t2MOVi 1, 14 /* CC::al */, $noreg, $noreg
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t2STRDi8 killed $r1, killed $r0, %stack.0.a, 8, 14 /* CC::al */, $noreg :: (volatile store 8 into %ir.arrayidx)
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$r0, $r1 = t2LDRDi8 %stack.0.a, 8, 14 /* CC::al */, $noreg :: (volatile dereferenceable load 8 from %ir.arrayidx1)
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tBX_RET 14 /* CC::al */, $noreg, implicit $r0, implicit $r1
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...
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