09d51a841d
Following the aix-small-local-exec-tls target attribute, this patch adds a target attribute for an AIX-specific option in llc that informs the compiler that it can use a faster access sequence for the local-dynamic TLS model (formally named aix-small-local-dynamic-tls) when TLS variables are less than ~32KB in size. The patch either produces an addi/la with a displacement off of module handle (return value from .__tls_get_mod) when the address is calculated, or it produces an addi/la followed by a load/store when the address is calculated and used for further accesses. --------- Co-authored-by: Amy Kwan <amy.kwan1@ibm.com>
40 lines
1.6 KiB
LLVM
40 lines
1.6 KiB
LLVM
; RUN: llc -mtriple powerpc64-ibm-aix-xcoff -ppc-asm-full-reg-names \
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; RUN: < %s | FileCheck %s
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; RUN: not llc -mtriple powerpc-ibm-aix-xcoff -ppc-asm-full-reg-names \
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; RUN: < %s 2>&1 | FileCheck %s --check-prefix=CHECK-NOT-SUPPORTED
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; RUN: not llc -mtriple powerpc64le-unknown-linux-gnu -ppc-asm-full-reg-names \
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; RUN: < %s 2>&1 | FileCheck %s --check-prefix=CHECK-NOT-SUPPORTED
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; RUN: not llc -mtriple powerpc64-ibm-aix-xcoff -ppc-asm-full-reg-names \
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; RUN: -data-sections=false < %s 2>&1 | \
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; RUN: FileCheck %s --check-prefix=CHECK-UNSUPPORTED-NO-DATASEC
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define dso_local signext i32 @testWithIRAttrLocalExec() #0 {
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entry:
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ret i32 0
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}
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define dso_local signext i32 @testWithIRAttrLocalDynamic() #1 {
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entry:
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ret i32 0
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}
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; Check that the aix-small-local-[exec|dynamic]-tls attribute is not supported on Linux and AIX (32-bit).
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; CHECK-NOT-SUPPORTED: The aix-small-local-[exec|dynamic]-tls attribute is only supported on AIX in 64-bit mode.
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; Check that the aix-small-local-[exec|dynamic]-tls attribute is only supported when
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; data sections are enabled.
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; CHECK-UNSUPPORTED-NO-DATASEC: The aix-small-local-[exec|dynamic]-tls attribute can only be specified with -data-sections.
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; Make sure that the test was actually compiled successfully after using the
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; aix-small-local-[exec|dynamic]-tls attribute.
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; CHECK-LABEL: testWithIRAttrLocalExec:
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; CHECK: li r3, 0
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; CHECK-NEXT: blr
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; CHECK-LABEL: testWithIRAttrLocalDynamic:
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; CHECK: li r3, 0
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; CHECK-NEXT: blr
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attributes #0 = { "target-features"="+aix-small-local-exec-tls" }
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attributes #1 = { "target-features"="+aix-small-local-dynamic-tls" }
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