You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
46 lines
1.4 KiB
46 lines
1.4 KiB
; REQUIRES: asserts
|
|
; RUN: llc < %s -debug-only=codegenprepare -o /dev/null 2>&1 | FileCheck %s
|
|
|
|
; These are regression tests for
|
|
; https://bugs.llvm.org/show_bug.cgi?id=34106
|
|
; "ARMTargetLowering::isLegalAddressingMode can accept incorrect
|
|
; addressing modes for Thumb1 target"
|
|
;
|
|
; The Thumb1 target addressing modes don't support scaling.
|
|
; It supports: r1 + r2, where r1 and r2 can be the same register.
|
|
|
|
target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
|
|
target triple = "thumbv6m-arm-none-eabi"
|
|
|
|
; Test case 01: %n is scaled by 4 (size of i32).
|
|
; Expected: GEP cannot be folded into LOAD.
|
|
; CHECK: local addrmode: [inbounds Base:%arrayidx]
|
|
define i32 @load01(i32* %p, i32 %n) nounwind {
|
|
entry:
|
|
%arrayidx = getelementptr inbounds i32, i32* %p, i32 %n
|
|
%0 = load i32, i32* %arrayidx, align 4
|
|
ret i32 %0
|
|
}
|
|
|
|
; Test case 02: No scale of %n is needed because the size of i8 is 1.
|
|
; Expected: GEP can be folded into LOAD.
|
|
; CHECK: local addrmode: [inbounds Base:%p + 1*%n]
|
|
define i8 @load02(i8* %p, i32 %n) nounwind {
|
|
entry:
|
|
%arrayidx = getelementptr inbounds i8, i8* %p, i32 %n
|
|
%0 = load i8, i8* %arrayidx
|
|
ret i8 %0
|
|
}
|
|
|
|
; Test case 03: 2*%x can be represented as %x + %x.
|
|
; Expected: GEP can be folded into LOAD.
|
|
; CHECK: local addrmode: [2*%x]
|
|
define i32 @load03(i32 %x) nounwind {
|
|
entry:
|
|
%mul = shl nsw i32 %x, 1
|
|
%0 = inttoptr i32 %mul to i32*
|
|
%1 = load i32, i32* %0, align 4
|
|
ret i32 %1
|
|
}
|
|
|