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GlobalISel: check type size before getZExtValue()ing it. 

Otherwise getZExtValue() asserts.
This commit is contained in:
Tim Northover 2021-02-01 12:43:33 +00:00
parent 8cda227432
commit c2b322fc19
2 changed files with 24 additions and 3 deletions
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5
llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
View File

@ -840,9 +840,8 @@ void IRTranslator::emitSwitchCase(SwitchCG::CaseBlock &CB,
// For conditional branch lowering, we might try to do something silly like
// emit an G_ICMP to compare an existing G_ICMP i1 result with true. If so,
// just re-use the existing condition vreg.
if (CI && CI->getZExtValue() == 1 &&
MRI->getType(CondLHS).getSizeInBits() == 1 &&
CB.PredInfo.Pred == CmpInst::ICMP_EQ) {
if (MRI->getType(CondLHS).getSizeInBits() == 1 && CI &&
CI->getZExtValue() == 1 && CB.PredInfo.Pred == CmpInst::ICMP_EQ) {
Cond = CondLHS;
} else {
Register CondRHS = getOrCreateVReg(*CB.CmpRHS);

22
llvm/test/CodeGen/AArch64/GlobalISel/huge-switch.ll Normal file
View File

@ -0,0 +1,22 @@
; RUN: llc -mtriple=arm64-apple-ios %s -o - -O0 -global-isel=1 | FileCheck %s
define void @foo(i512 %in) {
; CHECK-LABEL: foo:
; CHECK: cbz
switch i512 %in, label %default [
i512 3923188584616675477397368389504791510063972152790021570560, label %l1
i512 3923188584616675477397368389504791510063972152790021570561, label %l2
i512 3923188584616675477397368389504791510063972152790021570562, label %l3
]
default:
ret void
l1:
ret void
l2:
ret void
l3:
ret void
}