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[AArch64] Correct the check of signed 9-bit imm in isLegalAddressingMode()

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In the addressing mode, signed 9-bit imm is [-256, 255], not [-512, 511].

Differential Revision: https://reviews.llvm.org/D27480

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@288876 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Haicheng Wu 2016-12-07 01:45:04 +00:00
parent 742805e0ea
commit d55bd2eef3
2 changed files with 98 additions and 2 deletions
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2
lib/Target/AArch64/AArch64ISelLowering.cpp
View File

@ -7437,7 +7437,7 @@ bool AArch64TargetLowering::isLegalAddressingMode(const DataLayout &DL,
int64_t Offset = AM.BaseOffs;
// 9-bit signed offset
if (Offset >= -(1LL << 9) && Offset <= (1LL << 9) - 1)
if (isInt<9>(Offset))
return true;
// 12-bit unsigned offset

98
test/Analysis/CostModel/AArch64/gep.ll
View File

@ -125,7 +125,7 @@ define i32 @test15(i32* %p, i32 %i) {
define i64 @test16(i64* %p, i32 %i) {
; CHECK-LABEL: test16
; CHECK: cost of 0 for instruction: {{.*}} getelementptr inbounds i64, i64*
; CHECK: cost of 1 for instruction: {{.*}} getelementptr inbounds i64, i64*
%a = getelementptr inbounds i64, i64* %p, i32 -64
%v = load i64, i64* %a
ret i64 %v
@ -194,3 +194,99 @@ define i64 @test24(i64* %p, i32 %i) {
%v = load i64, i64* %a
ret i64 %v
}
define i8 @test25(i8* %p, i32 %i) {
; CHECK-LABEL: test25
; CHECK: cost of 0 for instruction: {{.*}} getelementptr inbounds i8, i8*
%a = getelementptr inbounds i8, i8* %p, i32 -128
%v = load i8, i8* %a
ret i8 %v
}
define i16 @test26(i16* %p, i32 %i) {
; CHECK-LABEL: test26
; CHECK: cost of 0 for instruction: {{.*}} getelementptr inbounds i16, i16*
%a = getelementptr inbounds i16, i16* %p, i32 -128
%v = load i16, i16* %a
ret i16 %v
}
define i32 @test27(i32* %p, i32 %i) {
; CHECK-LABEL: test27
; CHECK: cost of 1 for instruction: {{.*}} getelementptr inbounds i32, i32*
%a = getelementptr inbounds i32, i32* %p, i32 -128
%v = load i32, i32* %a
ret i32 %v
}
define i64 @test28(i64* %p, i32 %i) {
; CHECK-LABEL: test28
; CHECK: cost of 1 for instruction: {{.*}} getelementptr inbounds i64, i64*
%a = getelementptr inbounds i64, i64* %p, i32 -128
%v = load i64, i64* %a
ret i64 %v
}
define i8 @test29(i8* %p, i32 %i) {
; CHECK-LABEL: test29
; CHECK: cost of 0 for instruction: {{.*}} getelementptr inbounds i8, i8*
%a = getelementptr inbounds i8, i8* %p, i32 -256
%v = load i8, i8* %a
ret i8 %v
}
define i16 @test30(i16* %p, i32 %i) {
; CHECK-LABEL: test30
; CHECK: cost of 1 for instruction: {{.*}} getelementptr inbounds i16, i16*
%a = getelementptr inbounds i16, i16* %p, i32 -256
%v = load i16, i16* %a
ret i16 %v
}
define i32 @test31(i32* %p, i32 %i) {
; CHECK-LABEL: test31
; CHECK: cost of 1 for instruction: {{.*}} getelementptr inbounds i32, i32*
%a = getelementptr inbounds i32, i32* %p, i32 -256
%v = load i32, i32* %a
ret i32 %v
}
define i64 @test32(i64* %p, i32 %i) {
; CHECK-LABEL: test32
; CHECK: cost of 1 for instruction: {{.*}} getelementptr inbounds i64, i64*
%a = getelementptr inbounds i64, i64* %p, i32 -256
%v = load i64, i64* %a
ret i64 %v
}
define i8 @test33(i8* %p, i32 %i) {
; CHECK-LABEL: test33
; CHECK: cost of 1 for instruction: {{.*}} getelementptr inbounds i8, i8*
%a = getelementptr inbounds i8, i8* %p, i32 -512
%v = load i8, i8* %a
ret i8 %v
}
define i16 @test34(i16* %p, i32 %i) {
; CHECK-LABEL: test34
; CHECK: cost of 1 for instruction: {{.*}} getelementptr inbounds i16, i16*
%a = getelementptr inbounds i16, i16* %p, i32 -512
%v = load i16, i16* %a
ret i16 %v
}
define i32 @test35(i32* %p, i32 %i) {
; CHECK-LABEL: test35
; CHECK: cost of 1 for instruction: {{.*}} getelementptr inbounds i32, i32*
%a = getelementptr inbounds i32, i32* %p, i32 -512
%v = load i32, i32* %a
ret i32 %v
}
define i64 @test36(i64* %p, i32 %i) {
; CHECK-LABEL: test36
; CHECK: cost of 1 for instruction: {{.*}} getelementptr inbounds i64, i64*
%a = getelementptr inbounds i64, i64* %p, i32 -512
%v = load i64, i64* %a
ret i64 %v
}