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clang-p2996/clang/test/CodeGen/tbaa.cpp
Chandler Carruth 93786da2cb Make '-disable-llvm-optzns' an alias for '-disable-llvm-passes'. 
Much to my surprise, '-disable-llvm-optzns' which I thought was the
magical flag I wanted to get at the raw LLVM IR coming out of Clang
deosn't do that. It still runs some passes over the IR. I don't want
that, I really want the *raw* IR coming out of Clang and I strongly
suspect everyone else using it is in the same camp.

There is actually a flag that does what I want that I didn't know about
called '-disable-llvm-passes'. I suspect many others don't know about it
either. It both does what I want and is much simpler.

This removes the confusing version and makes that spelling of the flag
an alias for '-disable-llvm-passes'. I've also moved everything in Clang
to use the 'passes' spelling as it seems both more accurate (*all* LLVM
passes are disabled, not just optimizations) and much easier to remember
and spell correctly.

This is part of simplifying how Clang drives LLVM to make it cleaner to
wire up to the new pass manager.

Differential Revision: https://reviews.llvm.org/D28047

llvm-svn: 290392
2016-12-23 00:23:01 +00:00

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// RUN: %clang_cc1 -triple x86_64-apple-darwin -O1 -no-struct-path-tbaa -disable-llvm-passes %s -emit-llvm -o - | FileCheck %s
// RUN: %clang_cc1 -triple x86_64-apple-darwin -O1 -disable-llvm-passes %s -emit-llvm -o - | FileCheck %s -check-prefix=PATH
// RUN: %clang_cc1 -triple x86_64-apple-darwin -O0 -disable-llvm-passes %s -emit-llvm -o - | FileCheck %s -check-prefix=NO-TBAA
// RUN: %clang_cc1 -triple x86_64-apple-darwin -O1 -relaxed-aliasing -disable-llvm-passes %s -emit-llvm -o - | FileCheck %s -check-prefix=NO-TBAA
// Test TBAA metadata generated by front-end.
//
// NO-TBAA-NOT: !tbaa
typedef unsigned char uint8_t;
typedef unsigned short uint16_t;
typedef unsigned int uint32_t;
typedef unsigned long long uint64_t;
typedef struct
{
uint16_t f16;
uint32_t f32;
uint16_t f16_2;
uint32_t f32_2;
} StructA;
typedef struct
{
uint16_t f16;
StructA a;
uint32_t f32;
} StructB;
typedef struct
{
uint16_t f16;
StructB b;
uint32_t f32;
} StructC;
typedef struct
{
uint16_t f16;
StructB b;
uint32_t f32;
uint8_t f8;
} StructD;
typedef struct
{
uint16_t f16;
uint32_t f32;
} StructS;
typedef struct
{
uint16_t f16;
uint32_t f32;
} StructS2;
uint32_t g(uint32_t *s, StructA *A, uint64_t count) {
// CHECK-LABEL: define i32 @_Z1g
// CHECK: store i32 1, i32* %{{.*}}, align 4, !tbaa [[TAG_i32:!.*]]
// CHECK: store i32 4, i32* %{{.*}}, align 4, !tbaa [[TAG_i32]]
// PATH-LABEL: define i32 @_Z1g
// PATH: store i32 1, i32* %{{.*}}, align 4, !tbaa [[TAG_i32:!.*]]
// PATH: store i32 4, i32* %{{.*}}, align 4, !tbaa [[TAG_A_f32:!.*]]
*s = 1;
A->f32 = 4;
return *s;
}
uint32_t g2(uint32_t *s, StructA *A, uint64_t count) {
// CHECK-LABEL: define i32 @_Z2g2
// CHECK: store i32 1, i32* %{{.*}}, align 4, !tbaa [[TAG_i32]]
// CHECK: store i16 4, i16* %{{.*}}, align 4, !tbaa [[TAG_i16:!.*]]
// PATH-LABEL: define i32 @_Z2g2
// PATH: store i32 1, i32* %{{.*}}, align 4, !tbaa [[TAG_i32]]
// PATH: store i16 4, i16* %{{.*}}, align 4, !tbaa [[TAG_A_f16:!.*]]
*s = 1;
A->f16 = 4;
return *s;
}
uint32_t g3(StructA *A, StructB *B, uint64_t count) {
// CHECK-LABEL: define i32 @_Z2g3
// CHECK: store i32 1, i32* %{{.*}}, align 4, !tbaa [[TAG_i32]]
// CHECK: store i32 4, i32* %{{.*}}, align 4, !tbaa [[TAG_i32]]
// PATH-LABEL: define i32 @_Z2g3
// PATH: store i32 1, i32* %{{.*}}, align 4, !tbaa [[TAG_A_f32]]
// PATH: store i32 4, i32* %{{.*}}, align 4, !tbaa [[TAG_B_a_f32:!.*]]
A->f32 = 1;
B->a.f32 = 4;
return A->f32;
}
uint32_t g4(StructA *A, StructB *B, uint64_t count) {
// CHECK-LABEL: define i32 @_Z2g4
// CHECK: store i32 1, i32* %{{.*}}, align 4, !tbaa [[TAG_i32]]
// CHECK: store i16 4, i16* %{{.*}}, align 4, !tbaa [[TAG_i16]]
// PATH-LABEL: define i32 @_Z2g4
// PATH: store i32 1, i32* %{{.*}}, align 4, !tbaa [[TAG_A_f32]]
// PATH: store i16 4, i16* %{{.*}}, align 4, !tbaa [[TAG_B_a_f16:!.*]]
A->f32 = 1;
B->a.f16 = 4;
return A->f32;
}
uint32_t g5(StructA *A, StructB *B, uint64_t count) {
// CHECK-LABEL: define i32 @_Z2g5
// CHECK: store i32 1, i32* %{{.*}}, align 4, !tbaa [[TAG_i32]]
// CHECK: store i32 4, i32* %{{.*}}, align 4, !tbaa [[TAG_i32]]
// PATH-LABEL: define i32 @_Z2g5
// PATH: store i32 1, i32* %{{.*}}, align 4, !tbaa [[TAG_A_f32]]
// PATH: store i32 4, i32* %{{.*}}, align 4, !tbaa [[TAG_B_f32:!.*]]
A->f32 = 1;
B->f32 = 4;
return A->f32;
}
uint32_t g6(StructA *A, StructB *B, uint64_t count) {
// CHECK-LABEL: define i32 @_Z2g6
// CHECK: store i32 1, i32* %{{.*}}, align 4, !tbaa [[TAG_i32]]
// CHECK: store i32 4, i32* %{{.*}}, align 4, !tbaa [[TAG_i32]]
// PATH-LABEL: define i32 @_Z2g6
// PATH: store i32 1, i32* %{{.*}}, align 4, !tbaa [[TAG_A_f32]]
// PATH: store i32 4, i32* %{{.*}}, align 4, !tbaa [[TAG_B_a_f32_2:!.*]]
A->f32 = 1;
B->a.f32_2 = 4;
return A->f32;
}
uint32_t g7(StructA *A, StructS *S, uint64_t count) {
// CHECK-LABEL: define i32 @_Z2g7
// CHECK: store i32 1, i32* %{{.*}}, align 4, !tbaa [[TAG_i32]]
// CHECK: store i32 4, i32* %{{.*}}, align 4, !tbaa [[TAG_i32]]
// PATH-LABEL: define i32 @_Z2g7
// PATH: store i32 1, i32* %{{.*}}, align 4, !tbaa [[TAG_A_f32]]
// PATH: store i32 4, i32* %{{.*}}, align 4, !tbaa [[TAG_S_f32:!.*]]
A->f32 = 1;
S->f32 = 4;
return A->f32;
}
uint32_t g8(StructA *A, StructS *S, uint64_t count) {
// CHECK-LABEL: define i32 @_Z2g8
// CHECK: store i32 1, i32* %{{.*}}, align 4, !tbaa [[TAG_i32]]
// CHECK: store i16 4, i16* %{{.*}}, align 4, !tbaa [[TAG_i16]]
// PATH-LABEL: define i32 @_Z2g8
// PATH: store i32 1, i32* %{{.*}}, align 4, !tbaa [[TAG_A_f32]]
// PATH: store i16 4, i16* %{{.*}}, align 4, !tbaa [[TAG_S_f16:!.*]]
A->f32 = 1;
S->f16 = 4;
return A->f32;
}
uint32_t g9(StructS *S, StructS2 *S2, uint64_t count) {
// CHECK-LABEL: define i32 @_Z2g9
// CHECK: store i32 1, i32* %{{.*}}, align 4, !tbaa [[TAG_i32]]
// CHECK: store i32 4, i32* %{{.*}}, align 4, !tbaa [[TAG_i32]]
// PATH-LABEL: define i32 @_Z2g9
// PATH: store i32 1, i32* %{{.*}}, align 4, !tbaa [[TAG_S_f32]]
// PATH: store i32 4, i32* %{{.*}}, align 4, !tbaa [[TAG_S2_f32:!.*]]
S->f32 = 1;
S2->f32 = 4;
return S->f32;
}
uint32_t g10(StructS *S, StructS2 *S2, uint64_t count) {
// CHECK-LABEL: define i32 @_Z3g10
// CHECK: store i32 1, i32* %{{.*}}, align 4, !tbaa [[TAG_i32]]
// CHECK: store i16 4, i16* %{{.*}}, align 4, !tbaa [[TAG_i16]]
// PATH-LABEL: define i32 @_Z3g10
// PATH: store i32 1, i32* %{{.*}}, align 4, !tbaa [[TAG_S_f32]]
// PATH: store i16 4, i16* %{{.*}}, align 4, !tbaa [[TAG_S2_f16:!.*]]
S->f32 = 1;
S2->f16 = 4;
return S->f32;
}
uint32_t g11(StructC *C, StructD *D, uint64_t count) {
// CHECK-LABEL: define i32 @_Z3g11
// CHECK: store i32 1, i32* %{{.*}}, align 4, !tbaa [[TAG_i32]]
// CHECK: store i32 4, i32* %{{.*}}, align 4, !tbaa [[TAG_i32]]
// PATH-LABEL: define i32 @_Z3g11
// PATH: store i32 1, i32* %{{.*}}, align 4, !tbaa [[TAG_C_b_a_f32:!.*]]
// PATH: store i32 4, i32* %{{.*}}, align 4, !tbaa [[TAG_D_b_a_f32:!.*]]
C->b.a.f32 = 1;
D->b.a.f32 = 4;
return C->b.a.f32;
}
uint32_t g12(StructC *C, StructD *D, uint64_t count) {
// CHECK-LABEL: define i32 @_Z3g12
// CHECK: store i32 1, i32* %{{.*}}, align 4, !tbaa [[TAG_i32]]
// CHECK: store i32 4, i32* %{{.*}}, align 4, !tbaa [[TAG_i32]]
// TODO: differentiate the two accesses.
// PATH-LABEL: define i32 @_Z3g12
// PATH: store i32 1, i32* %{{.*}}, align 4, !tbaa [[TAG_B_a_f32]]
// PATH: store i32 4, i32* %{{.*}}, align 4, !tbaa [[TAG_B_a_f32]]
StructB *b1 = &(C->b);
StructB *b2 = &(D->b);
// b1, b2 have different context.
b1->a.f32 = 1;
b2->a.f32 = 4;
return b1->a.f32;
}
// Make sure that zero-length bitfield works.
#define ATTR __attribute__ ((ms_struct))
struct five {
char a;
int :0; /* ignored; prior field is not a bitfield. */
char b;
char c;
} ATTR;
char g13(struct five *a, struct five *b) {
return a->b;
// CHECK-LABEL: define signext i8 @_Z3g13
// CHECK: load i8, i8* %{{.*}}, align 1, !tbaa [[TAG_char:!.*]]
// PATH-LABEL: define signext i8 @_Z3g13
// PATH: load i8, i8* %{{.*}}, align 1, !tbaa [[TAG_five_b:!.*]]
}
struct six {
char a;
int :0;
char b;
char c;
};
char g14(struct six *a, struct six *b) {
// CHECK-LABEL: define signext i8 @_Z3g14
// CHECK: load i8, i8* %{{.*}}, align 1, !tbaa [[TAG_char]]
// PATH-LABEL: define signext i8 @_Z3g14
// PATH: load i8, i8* %{{.*}}, align 1, !tbaa [[TAG_six_b:!.*]]
return a->b;
}
// Types that differ only by name may alias.
typedef StructS StructS3;
uint32_t g15(StructS *S, StructS3 *S3, uint64_t count) {
// CHECK-LABEL: define i32 @_Z3g15
// CHECK: store i32 1, i32* %{{.*}}, align 4, !tbaa [[TAG_i32]]
// CHECK: store i32 4, i32* %{{.*}}, align 4, !tbaa [[TAG_i32]]
// PATH-LABEL: define i32 @_Z3g15
// PATH: store i32 1, i32* %{{.*}}, align 4, !tbaa [[TAG_S_f32]]
// PATH: store i32 4, i32* %{{.*}}, align 4, !tbaa [[TAG_S_f32]]
S->f32 = 1;
S3->f32 = 4;
return S->f32;
}
// CHECK: [[TYPE_char:!.*]] = !{!"omnipotent char", [[TAG_cxx_tbaa:!.*]],
// CHECK: [[TAG_cxx_tbaa]] = !{!"Simple C++ TBAA"}
// CHECK: [[TAG_i32]] = !{[[TYPE_i32:!.*]], [[TYPE_i32]], i64 0}
// CHECK: [[TYPE_i32]] = !{!"int", [[TYPE_char]],
// CHECK: [[TAG_i16]] = !{[[TYPE_i16:!.*]], [[TYPE_i16]], i64 0}
// CHECK: [[TYPE_i16]] = !{!"short", [[TYPE_char]],
// CHECK: [[TAG_char]] = !{[[TYPE_char]], [[TYPE_char]], i64 0}
// PATH: [[TYPE_CHAR:!.*]] = !{!"omnipotent char", !
// PATH: [[TAG_i32]] = !{[[TYPE_INT:!.*]], [[TYPE_INT]], i64 0}
// PATH: [[TYPE_INT]] = !{!"int", [[TYPE_CHAR]]
// PATH: [[TAG_A_f32]] = !{[[TYPE_A:!.*]], [[TYPE_INT]], i64 4}
// PATH: [[TYPE_A]] = !{!"_ZTS7StructA", [[TYPE_SHORT:!.*]], i64 0, [[TYPE_INT]], i64 4, [[TYPE_SHORT]], i64 8, [[TYPE_INT]], i64 12}
// PATH: [[TYPE_SHORT:!.*]] = !{!"short", [[TYPE_CHAR]]
// PATH: [[TAG_A_f16]] = !{[[TYPE_A]], [[TYPE_SHORT]], i64 0}
// PATH: [[TAG_B_a_f32]] = !{[[TYPE_B:!.*]], [[TYPE_INT]], i64 8}
// PATH: [[TYPE_B]] = !{!"_ZTS7StructB", [[TYPE_SHORT]], i64 0, [[TYPE_A]], i64 4, [[TYPE_INT]], i64 20}
// PATH: [[TAG_B_a_f16]] = !{[[TYPE_B]], [[TYPE_SHORT]], i64 4}
// PATH: [[TAG_B_f32]] = !{[[TYPE_B]], [[TYPE_INT]], i64 20}
// PATH: [[TAG_B_a_f32_2]] = !{[[TYPE_B]], [[TYPE_INT]], i64 16}
// PATH: [[TAG_S_f32]] = !{[[TYPE_S:!.*]], [[TYPE_INT]], i64 4}
// PATH: [[TYPE_S]] = !{!"_ZTS7StructS", [[TYPE_SHORT]], i64 0, [[TYPE_INT]], i64 4}
// PATH: [[TAG_S_f16]] = !{[[TYPE_S]], [[TYPE_SHORT]], i64 0}
// PATH: [[TAG_S2_f32]] = !{[[TYPE_S2:!.*]], [[TYPE_INT]], i64 4}
// PATH: [[TYPE_S2]] = !{!"_ZTS8StructS2", [[TYPE_SHORT]], i64 0, [[TYPE_INT]], i64 4}
// PATH: [[TAG_S2_f16]] = !{[[TYPE_S2]], [[TYPE_SHORT]], i64 0}
// PATH: [[TAG_C_b_a_f32]] = !{[[TYPE_C:!.*]], [[TYPE_INT]], i64 12}
// PATH: [[TYPE_C]] = !{!"_ZTS7StructC", [[TYPE_SHORT]], i64 0, [[TYPE_B]], i64 4, [[TYPE_INT]], i64 28}
// PATH: [[TAG_D_b_a_f32]] = !{[[TYPE_D:!.*]], [[TYPE_INT]], i64 12}
// PATH: [[TYPE_D]] = !{!"_ZTS7StructD", [[TYPE_SHORT]], i64 0, [[TYPE_B]], i64 4, [[TYPE_INT]], i64 28, [[TYPE_CHAR]], i64 32}
// PATH: [[TAG_five_b]] = !{[[TYPE_five:!.*]], [[TYPE_CHAR]], i64 1}
// PATH: [[TYPE_five]] = !{!"_ZTS4five", [[TYPE_CHAR]], i64 0, [[TYPE_INT]], i64 1, [[TYPE_CHAR]], i64 1, [[TYPE_CHAR]], i64 2}
// PATH: [[TAG_six_b]] = !{[[TYPE_six:!.*]], [[TYPE_CHAR]], i64 4}
// PATH: [[TYPE_six]] = !{!"_ZTS3six", [[TYPE_CHAR]], i64 0, [[TYPE_INT]], i64 4, [[TYPE_CHAR]], i64 4, [[TYPE_CHAR]], i64 5}
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