63 lines
1.7 KiB
C
63 lines
1.7 KiB
C
// RUN: %clang_cc1 -triple s390x-linux-gnu -emit-llvm %s -o - | FileCheck %s
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// SystemZ prefers to align all global variables to two bytes.
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struct test {
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signed char a;
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};
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char c;
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// CHECK-DAG: @c ={{.*}} global i8 0, align 2
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struct test s;
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// CHECK-DAG: @s ={{.*}} global %struct.test zeroinitializer, align 2
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extern char ec;
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// CHECK-DAG: @ec = external global i8, align 2
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extern struct test es;
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// CHECK-DAG: @es = external global %struct.test, align 2
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// Dummy function to make sure external symbols are used.
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void func (void)
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{
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c = ec;
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s = es;
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}
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// Test that a global variable with an incomplete type gets the minimum
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// alignment of 2 per the ABI if no alignment was specified by user.
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//
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// CHECK-DAG: @VarNoAl {{.*}} align 2
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// CHECK-DAG: @VarExplAl1 {{.*}} align 1
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// CHECK-DAG: @VarExplAl4 {{.*}} align 4
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struct incomplete_ty;
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extern struct incomplete_ty VarNoAl;
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extern struct incomplete_ty __attribute__((aligned(1))) VarExplAl1;
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extern struct incomplete_ty __attribute__((aligned(4))) VarExplAl4;
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struct incomplete_ty *fun0 (void) { return &VarNoAl; }
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struct incomplete_ty *fun1 (void) { return &VarExplAl1; }
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struct incomplete_ty *fun2 (void) { return &VarExplAl4; }
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// The SystemZ ABI aligns __int128_t to only eight bytes.
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struct S_int128 { __int128_t B; } Obj_I128;
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__int128_t GlobI128;
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// CHECK: @Obj_I128 = global %struct.S_int128 zeroinitializer, align 8
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// CHECK: @GlobI128 = global i128 0, align 8
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// Alignment should be respected for coerced argument loads
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struct arg { long y __attribute__((packed, aligned(4))); };
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extern struct arg x;
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void f(struct arg);
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void test (void)
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{
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f(x);
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}
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// CHECK-LABEL: @test
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// CHECK: load i64, ptr @x, align 4
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