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AMDGPU: fix existing alias rules for constant and global

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Constant and global may alias, also one rules table wasn't
ordered correctly.

Pinpointed by Matt.

v2: add a test with swapped parameters
llvm-svn: 340416
This commit is contained in:
Samuel Pitoiset 2018-08-22 16:08:43 +00:00
parent a188ef13f1
commit a084b54d47
2 changed files with 17 additions and 5 deletions
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10
lib/Target/AMDGPU/AMDGPUAliasAnalysis.cpp
View File

@ -54,8 +54,8 @@ AMDGPUAAResult::ASAliasRulesTy::ASAliasRulesTy(AMDGPUAS AS_, Triple::ArchType Ar
static const AliasResult ASAliasRulesPrivIsZero[6][6] = {
/* Private Global Constant Group Flat Region*/
/* Private */ {MayAlias, NoAlias , NoAlias , NoAlias , MayAlias, NoAlias},
/* Global */ {NoAlias , MayAlias, NoAlias , NoAlias , MayAlias, NoAlias},
/* Constant */ {NoAlias , NoAlias , MayAlias, NoAlias , MayAlias, NoAlias},
/* Global */ {NoAlias , MayAlias, MayAlias, NoAlias , MayAlias, NoAlias},
/* Constant */ {NoAlias , MayAlias, MayAlias, NoAlias , MayAlias, NoAlias},
/* Group */ {NoAlias , NoAlias , NoAlias , MayAlias, MayAlias, NoAlias},
/* Flat */ {MayAlias, MayAlias, MayAlias, MayAlias, MayAlias, MayAlias},
/* Region */ {NoAlias , NoAlias , NoAlias , NoAlias , MayAlias, MayAlias}
@ -63,10 +63,10 @@ AMDGPUAAResult::ASAliasRulesTy::ASAliasRulesTy(AMDGPUAS AS_, Triple::ArchType Ar
static const AliasResult ASAliasRulesGenIsZero[6][6] = {
/* Flat Global Region Group Constant Private */
/* Flat */ {MayAlias, MayAlias, MayAlias, MayAlias, MayAlias, MayAlias},
/* Global */ {MayAlias, MayAlias, NoAlias , NoAlias , NoAlias , NoAlias},
/* Constant */ {MayAlias, NoAlias , MayAlias, NoAlias , NoAlias, NoAlias},
/* Group */ {MayAlias, NoAlias , NoAlias , MayAlias, NoAlias , NoAlias},
/* Global */ {MayAlias, MayAlias, NoAlias , NoAlias , MayAlias, NoAlias},
/* Region */ {MayAlias, NoAlias , NoAlias , NoAlias, MayAlias, NoAlias},
/* Group */ {MayAlias, NoAlias , NoAlias , MayAlias, NoAlias , NoAlias},
/* Constant */ {MayAlias, MayAlias, MayAlias, NoAlias , NoAlias, NoAlias},
/* Private */ {MayAlias, NoAlias , NoAlias , NoAlias , NoAlias , MayAlias}
};
assert(AS.MAX_COMMON_ADDRESS <= 5);

12
test/CodeGen/AMDGPU/amdgpu-alias-analysis.ll
View File

@ -7,3 +7,15 @@ define void @test(i8 addrspace(5)* %p, i8 addrspace(1)* %p1) {
ret void
}
; CHECK: MayAlias: i8 addrspace(1)* %p1, i8 addrspace(4)* %p
define void @test_constant_vs_global(i8 addrspace(4)* %p, i8 addrspace(1)* %p1) {
ret void
}
; CHECK: MayAlias: i8 addrspace(1)* %p, i8 addrspace(4)* %p1
define void @test_global_vs_constant(i8 addrspace(1)* %p, i8 addrspace(4)* %p1) {
ret void
}