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https://github.com/c64scene-ar/llvm-6502.git
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01dbae1163
The only Thumb-1 multi-store capable of using LR is the PUSH instruction, which translates to STMDB, so we shouldn't convert STMIAs. Patch by Sergey Dmitrouk. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@217498 91177308-0d34-0410-b5e6-96231b3b80d8
21 lines
796 B
LLVM
21 lines
796 B
LLVM
; RUN: llc -mcpu=cortex-a9 -O1 -filetype=obj %s -o - | llvm-objdump -arch thumb -mcpu=cortex-a9 -d - | FileCheck %s
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target datalayout = "e-m:e-p:32:32-i1:8:32-i8:8:32-i16:16:32-i64:64-v128:64:128-a:0:32-n32-S64"
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target triple = "thumbv7--linux-gnueabi"
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declare i8* @llvm.returnaddress(i32)
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define i32* @wrong-t2stmia-size-reduction(i32* %addr, i32 %val0) minsize {
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store i32 %val0, i32* %addr
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%addr1 = getelementptr i32* %addr, i32 1
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%lr = call i8* @llvm.returnaddress(i32 0)
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%lr32 = ptrtoint i8* %lr to i32
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store i32 %lr32, i32* %addr1
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%addr2 = getelementptr i32* %addr1, i32 1
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ret i32* %addr2
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}
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; Check that stm writes two registers. The bug caused one of registers (LR,
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; which invalid for Thumb1 form of STMIA instruction) to be dropped.
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; CHECK: stm{{[^,]*}}, {{{.*,.*}}}
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