[PATCH] D40789: [GlobalISel] Disable GISel for big endian
Amara Emerson via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Fri Dec 8 06:49:03 PST 2017
aemerson updated this revision to Diff 126140.
aemerson added a comment.
Thanks, I've added a new fallback test.
Repository:
rL LLVM
https://reviews.llvm.org/D40789
Files:
lib/CodeGen/GlobalISel/IRTranslator.cpp
test/CodeGen/AArch64/GlobalISel/arm64-fallback.ll
test/CodeGen/ARM/GlobalISel/arm-irtranslator.ll
test/CodeGen/ARM/GlobalISel/arm-param-lowering.ll
Index: test/CodeGen/ARM/GlobalISel/arm-param-lowering.ll
===================================================================
--- test/CodeGen/ARM/GlobalISel/arm-param-lowering.ll
+++ test/CodeGen/ARM/GlobalISel/arm-param-lowering.ll
@@ -1,5 +1,6 @@
; RUN: llc -mtriple arm-unknown -mattr=+vfp2,+v4t -global-isel -stop-after=irtranslator -verify-machineinstrs %s -o - | FileCheck %s -check-prefix=CHECK -check-prefix=LITTLE
-; RUN: llc -mtriple armeb-unknown -mattr=+vfp2,+v4t -global-isel -stop-after=irtranslator -verify-machineinstrs %s -o - | FileCheck %s -check-prefix=CHECK -check-prefix=BIG
+; RUN: llc -mtriple armeb-unknown -mattr=+vfp2,+v4t -global-isel -global-isel-abort=0 -stop-after=irtranslator -verify-machineinstrs %s -o - | FileCheck %s -check-prefix=CHECK -check-prefix=BIG
+; XFAIL: armeb
declare arm_aapcscc i32* @simple_reg_params_target(i32, i32*)
Index: test/CodeGen/ARM/GlobalISel/arm-irtranslator.ll
===================================================================
--- test/CodeGen/ARM/GlobalISel/arm-irtranslator.ll
+++ test/CodeGen/ARM/GlobalISel/arm-irtranslator.ll
@@ -1,5 +1,6 @@
; RUN: llc -mtriple arm-unknown -mattr=+vfp2,+v4t -global-isel -stop-after=irtranslator -verify-machineinstrs %s -o - | FileCheck %s -check-prefix=CHECK -check-prefix=LITTLE
-; RUN: llc -mtriple armeb-unknown -mattr=+vfp2,+v4t -global-isel -stop-after=irtranslator -verify-machineinstrs %s -o - | FileCheck %s -check-prefix=CHECK -check-prefix=BIG
+; RUN: llc -mtriple armeb-unknown -mattr=+vfp2,+v4t -global-isel -global-isel-abort=0 -stop-after=irtranslator -verify-machineinstrs %s -o - | FileCheck %s -check-prefix=CHECK -check-prefix=BIG
+; XFAIL: armeb
define void @test_void_return() {
; CHECK-LABEL: name: test_void_return
Index: test/CodeGen/AArch64/GlobalISel/arm64-fallback.ll
===================================================================
--- test/CodeGen/AArch64/GlobalISel/arm64-fallback.ll
+++ test/CodeGen/AArch64/GlobalISel/arm64-fallback.ll
@@ -3,6 +3,7 @@
; RUN: llc -O0 -global-isel -global-isel-abort=2 -pass-remarks-missed='gisel*' -verify-machineinstrs %s -o %t.out 2> %t.err
; RUN: FileCheck %s --check-prefix=FALLBACK-WITH-REPORT-OUT < %t.out
; RUN: FileCheck %s --check-prefix=FALLBACK-WITH-REPORT-ERR < %t.err
+; RUN: not llc -global-isel -mtriple aarch64_be %s -o - 2>&1 | FileCheck %s --check-prefix=BIG-ENDIAN
; This file checks that the fallback path to selection dag works.
; The test is fragile in the sense that it must be updated to expose
; something that fails with global-isel.
@@ -12,6 +13,8 @@
target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"
target triple = "aarch64--"
+; BIG-ENDIAN: unable to translate in big endian mode
+
; We use __fixunstfti as the common denominator for __fixunstfti on Linux and
; ___fixunstfti on iOS
; ERROR: unable to lower arguments: i128 (i128)* (in function: ABIi128)
Index: lib/CodeGen/GlobalISel/IRTranslator.cpp
===================================================================
--- lib/CodeGen/GlobalISel/IRTranslator.cpp
+++ lib/CodeGen/GlobalISel/IRTranslator.cpp
@@ -1253,6 +1253,15 @@
assert(PendingPHIs.empty() && "stale PHIs");
+ if (!DL->isLittleEndian()) {
+ // Currently we don't properly handle big endian code.
+ OptimizationRemarkMissed R("gisel-irtranslator", "GISelFailure",
+ MF->getFunction()->getSubprogram(),
+ &MF->getFunction()->getEntryBlock());
+ R << "unable to translate in big endian mode";
+ reportTranslationError(*MF, *TPC, *ORE, R);
+ }
+
// Release the per-function state when we return, whether we succeeded or not.
auto FinalizeOnReturn = make_scope_exit([this]() { finalizeFunction(); });
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