derek.holloway
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56 lines
4.7 KiB
C++
56 lines
4.7 KiB
C++
// RUN: %clang_cc1 -triple x86_64-unknown-unknown -ftrivial-auto-var-init=pattern -ftrivial-auto-var-init-stop-after=1 %s -emit-llvm -o - | FileCheck %s -check-prefix=PATTERN-STOP-AFTER-1-SCALAR
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// RUN: %clang_cc1 -triple x86_64-unknown-unknown -ftrivial-auto-var-init=pattern -ftrivial-auto-var-init-stop-after=2 %s -emit-llvm -o - | FileCheck %s -check-prefix=PATTERN-STOP-AFTER-2-ARRAY
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// RUN: %clang_cc1 -triple x86_64-unknown-unknown -ftrivial-auto-var-init=pattern -ftrivial-auto-var-init-stop-after=3 %s -emit-llvm -o - | FileCheck %s -check-prefix=PATTERN-STOP-AFTER-3-VLA
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// RUN: %clang_cc1 -triple x86_64-unknown-unknown -ftrivial-auto-var-init=pattern -ftrivial-auto-var-init-stop-after=4 %s -emit-llvm -o - | FileCheck %s -check-prefix=PATTERN-STOP-AFTER-4-POINTER
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// RUN: %clang_cc1 -triple x86_64-unknown-unknown -ftrivial-auto-var-init=pattern -ftrivial-auto-var-init-stop-after=5 %s -emit-llvm -o - | FileCheck %s -check-prefix=PATTERN-STOP-AFTER-5-BUILTIN
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// RUN: %clang_cc1 -triple x86_64-unknown-unknown -ftrivial-auto-var-init=zero -ftrivial-auto-var-init-stop-after=1 %s -emit-llvm -o - | FileCheck %s -check-prefix=ZERO-STOP-AFTER-1-SCALAR
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// RUN: %clang_cc1 -triple x86_64-unknown-unknown -ftrivial-auto-var-init=zero -ftrivial-auto-var-init-stop-after=2 %s -emit-llvm -o - | FileCheck %s -check-prefix=ZERO-STOP-AFTER-2-ARRAY
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// RUN: %clang_cc1 -triple x86_64-unknown-unknown -ftrivial-auto-var-init=zero -ftrivial-auto-var-init-stop-after=3 %s -emit-llvm -o - | FileCheck %s -check-prefix=ZERO-STOP-AFTER-3-VLA
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// RUN: %clang_cc1 -triple x86_64-unknown-unknown -ftrivial-auto-var-init=zero -ftrivial-auto-var-init-stop-after=4 %s -emit-llvm -o - | FileCheck %s -check-prefix=ZERO-STOP-AFTER-4-POINTER
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// RUN: %clang_cc1 -triple x86_64-unknown-unknown -ftrivial-auto-var-init=zero -ftrivial-auto-var-init-stop-after=5 %s -emit-llvm -o - | FileCheck %s -check-prefix=ZERO-STOP-AFTER-5-BUILTIN
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#define ARRLEN 10
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typedef struct {
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int i;
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char c;
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} S;
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int foo(unsigned n) {
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// scalar variable
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long a;
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// array
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S arr[ARRLEN];
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// VLA
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S vla[n];
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// pointer
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void *p;
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// builtin
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p = __builtin_alloca(sizeof(unsigned long long) * n);
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// PATTERN-STOP-AFTER-1-SCALAR: store i64 -6148914691236517206, ptr %a, align 8
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// PATTERN-STOP-AFTER-1-SCALAR-NOT: call void @llvm.memset.p0.i64(ptr align 16 %0, i8 -86, i64 80, i1 false)
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// PATTERN-STOP-AFTER-2-ARRAY: call void @llvm.memset.p0.i64(ptr align 16 %arr, i8 -86, i64 80, i1 false)
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// PATTERN-STOP-AFTER-2-ARRAY-NOT: vla-init.loop:
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// PATTERN-STOP-AFTER-3-VLA: vla-init.loop:
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// PATTERN-STOP-AFTER-3-VLA-NEXT: %vla.cur = phi ptr [ %vla, %vla-setup.loop ], [ %vla.next, %vla-init.loop ]
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// PATTERN-STOP-AFTER-3-VLA-NEXT-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 8 %vla.cur, ptr align 4 @__const._Z3fooj.vla, i64 8, i1 false)
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// PATTERN-STOP-AFTER-3-VLA-NOT: store ptr inttoptr (i64 -6148914691236517206 to ptr), ptr %p, align 8
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// PATTERN-STOP-AFTER-4-POINTER: store ptr inttoptr (i64 -6148914691236517206 to ptr), ptr %p, align 8
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// PATTERN-STOP-AFTER-4-POINTER-NOT: call void @llvm.memset.p0.i64(ptr align 16 %5, i8 -86, i64 %mul, i1 false)
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// PATTERN-STOP-AFTER-5-BUILTIN: call void @llvm.memset.p0.i64(ptr align 16 %5, i8 -86, i64 %mul, i1 false)
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// PATTERN-STOP-AFTER-5-BUILTIN-MESSAGES: warning: -ftrivial-auto-var-init-stop-after=5 has been enabled to limit the number of times ftrivial-auto-var-init=pattern gets applied.
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// ZERO-STOP-AFTER-1-SCALAR: store i64 0, ptr %a, align 8
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// ZERO-STOP-AFTER-1-SCALAR-NOT: call void @llvm.memset.p0.i64(ptr align 16 %arr, i8 0, i64 80, i1 false)
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// ZERO-STOP-AFTER-2-ARRAY: call void @llvm.memset.p0.i64(ptr align 16 %arr, i8 0, i64 80, i1 false)
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// ZERO-STOP-AFTER-2-ARRAY-NOT: %call void @llvm.memset.p0.i64(ptr align 16 %3, i8 0, i64 %2, i1 false)
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// ZERO-STOP-AFTER-3-VLA: call void @llvm.memset.p0.i64(ptr align 16 %vla, i8 0, i64 %3, i1 false)
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// ZERO-STOP-AFTER-3-VLA-NOT: store ptr null, ptr %p, align 8
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// ZERO-STOP-AFTER-4-POINTER: store ptr null, ptr %p, align 8
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// ZERO-STOP-AFTER-4-POINTER-NOT: call void @llvm.memset.p0.i64(ptr align 16 %4, i8 0, i64 %mul, i1 false)
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// ZERO-STOP-AFTER-5-BUILTIN: %5 = alloca i8, i64 %mul, align 16
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// ZERO-STOP-AFTER-5-BUILTIN-NEXT: call void @llvm.memset.p0.i64(ptr align 16 %5, i8 0, i64 %mul, i1 false)
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// ZERO-STOP-AFTER-5-BUILTIN-MESSAGES: warnings: -ftrivial-auto-var-init-stop-after=5 has been enabled to limit the number of times ftrivial-auto-var-init=zero gets applied.
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return 0;
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}
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