bc747c3e13
The current MCInstBuilder for generating an ALGFI when loading something from the ADA is incorrect and will crash the compiler. r0 must also be excluded from the registers returned as the result, since it is treated as the value "0" on z/OS. Also add some tests to properly test the paths where LLILF and ALGFI are generated. --------- Co-authored-by: Tony Tao <tonytao@ca.ibm.com>
34 lines
927 B
Python
34 lines
927 B
Python
# Test code generation for retrieving function descriptors
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# from the ADA when the ADA is extremely large and forces the
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# generation of a different instruction sequence
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# RUN: %python %s | llc -mtriple=s390x-ibm-zos -O2 | FileCheck %s
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# CHECK: algfi 8, {{[0-9]+}}
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# CHECK: la 8, 0(8)
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from __future__ import print_function
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num_calls = 35000
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print("define hidden signext i32 @main() {")
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print("entry:")
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for i in range(num_calls):
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print(" call void @foo%d()" % i)
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# This is added to force the use of register r8 to generate
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# la 8, 0(8) which generates the algfi instruction
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print('%0 = call ptr asm " LGR $0,$1\0A", "=r,{r8}"(ptr nonnull @foo)')
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print(" call void @bar(ptr noundef %0)")
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print("ret i32 0")
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print("}")
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for i in range(num_calls):
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print("declare void @foo%d(...)" % i)
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print("declare void @bar(ptr noundef)")
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print("define internal void @foo() {")
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print("entry:")
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print(" ret void")
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print(" }")
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