derek.holloway
7502bf64a4
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47 lines
1.3 KiB
C
47 lines
1.3 KiB
C
// RUN: %clang_cc1 -triple x86_64-unknown-unknown -emit-llvm -o - %s | FileCheck %s
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// RUN: %clang_cc1 -triple i386-mingw32 -fms-extensions -emit-llvm -o - %s | FileCheck %s
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int nonconst(void);
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int isconst(void) __attribute__((const));
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int ispure(void) __attribute__((pure));
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// CHECK-LABEL: @test1
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int test1(int *a, int i) {
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// CHECK: store ptr %a, ptr [[A_ADDR:%.+]], align
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// CHECK: [[A:%.+]] = load ptr, ptr [[A_ADDR]]
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// CHECK: [[CMP:%.+]] = icmp ne ptr [[A]], null
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// CHECK: call void @llvm.assume(i1 [[CMP]])
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// CHECK: [[CALL:%.+]] = call i32 @isconst()
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// CHECK: [[BOOL:%.+]] = icmp ne i32 [[CALL]], 0
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// CHECK: call void @llvm.assume(i1 [[BOOL]])
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// CHECK: [[CALLPURE:%.+]] = call i32 @ispure()
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// CHECK: [[BOOLPURE:%.+]] = icmp ne i32 [[CALLPURE]], 0
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// CHECK: call void @llvm.assume(i1 [[BOOLPURE]])
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#ifdef _MSC_VER
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__assume(a != 0)
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__assume(isconst());
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__assume(ispure());
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#else
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__builtin_assume(a != 0);
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__builtin_assume(isconst());
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__builtin_assume(ispure());
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#endif
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// Nothing is generated for an assume with side effects...
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// CHECK-NOT: load ptr, ptr %i.addr
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// CHECK-NOT: call void @llvm.assume
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// CHECK-NOT: call i32 @nonconst()
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#ifdef _MSC_VER
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__assume(++i != 0)
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__assume(nonconst());
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#else
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__builtin_assume(++i != 0);
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__builtin_assume(nonconst());
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#endif
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return a[0];
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}
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