734881a6d5
The output assembly (textual) contains the instruction r29 = add(r29,#4294967136) The value 4294967136 is -160 when interpreted as a signed 32-bit integer, so it fits in the range of the immediate operand without a constant extender. The range check in HexagonInstrInfo was putting the operand value into an int variable, reporting no need for an extender. This resulted in a packet with 4 instructions, including the "add". The corresponding check in HexagonMCInstrInfo was using an int64_t variable, causing the range check to fail, and an extender to be emitted when lowering to MCInst, resulting in a packet with too many instructions.
27 lines
1006 B
LLVM
27 lines
1006 B
LLVM
; RUN: llc -march=hexagon -filetype=obj < %s | llvm-objdump -d - | FileCheck %s
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; The output assembly (textual) contains the instruction
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; r29 = add(r29,#4294967136)
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; The value 4294967136 is -160 when interpreted as a signed 32-bit
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; integer, so it fits in the range of the immediate operand without
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; a constant extender. The range check in HexagonInstrInfo was putting
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; the operand value into an int variable, reporting no need for an
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; extender. This resulted in a packet with 4 instructions, including
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; the "add". The corresponding check in HexagonMCInstrInfo was using
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; an int64_t variable, causing an extender to be emitted when lowering
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; to MCInst, and resulting in a packet with 5 instructions.
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; Check that this doesn't crash.
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; CHECK: r29 = add(r29,#-0xa0)
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target triple = "hexagon-unknown-linux-gnu"
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define float @f0() {
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b0:
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%v0 = alloca i8, i32 0, align 1
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%v1 = alloca float, i32 -42, align 4
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%v2 = load float, ptr %v1, align 4
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store i8 0, ptr %v0, align 1
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ret float %v2
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}
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