derek.holloway
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44 lines
1.3 KiB
Python
44 lines
1.3 KiB
Python
# Test cases where MVC is used for spill slots that end up being out of range.
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# RUN: %python %s | llc -mtriple=s390x-linux-gnu | FileCheck %s
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# There are 8 usable call-saved GPRs, two of which are needed for the base
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# registers. The first 160 bytes of the frame are needed for the ABI
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# call frame, and a further 8 bytes are needed for the emergency spill slot.
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# That means we will have at least one out-of-range slot if:
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#
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# count == (4096 - 168) / 8 + 6 + 1 == 498
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#
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# Add in some extra room and check both %r15+4096 (the first out-of-range slot)
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# and %r15+4104.
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#
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# CHECK: f1:
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# CHECK: lay [[REG:%r[0-5]]], 4096(%r15)
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# CHECK: mvc 0(8,[[REG]]), {{[0-9]+}}({{%r[0-9]+}})
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# CHECK: brasl %r14, foo@PLT
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# CHECK: lay [[REG:%r[0-5]]], 4096(%r15)
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# CHECK: mvc {{[0-9]+}}(8,{{%r[0-9]+}}), 8([[REG]])
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# CHECK: br %r14
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from __future__ import print_function
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count = 500
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print("declare void @foo()")
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print("")
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print("define void @f1(i64 *%base0, i64 *%base1) {")
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for i in range(count):
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print(" %%ptr%d = getelementptr i64, i64 *%%base%d, i64 %d" % (i, i % 2, i / 2))
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print(" %%val%d = load i64 , i64 *%%ptr%d" % (i, i))
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print("")
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print(" call void @foo()")
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print("")
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for i in range(count):
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print(" store i64 %%val%d, i64 *%%ptr%d" % (i, i))
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print("")
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print(" ret void")
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print("}")
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