aea82d4551
Currently in Sema::ActOnEnumBody(...) when calculating NumPositiveBits we miss the case where there is only a single enumerator with value zero and the case of an empty enum. In both cases we end up with zero positive bits when in fact we need one bit to store the value zero. This PR updates the calculation to account for these cases. Differential Revision: https://reviews.llvm.org/D130301
146 lines
3.8 KiB
C++
146 lines
3.8 KiB
C++
// RUN: %clang_cc1 -no-opaque-pointers %s -triple i386-unknown-unknown -emit-llvm -O1 -relaxed-aliasing -fstrict-enums -std=c++11 -o - | FileCheck %s
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// RUN: %clang_cc1 -no-opaque-pointers %s -triple i386-unknown-unknown -emit-llvm -O1 -relaxed-aliasing -std=c++11 -o - | FileCheck --check-prefix=NO-STRICT-ENUMS %s
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bool f(bool *x) {
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return *x;
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}
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// CHECK-LABEL: define{{.*}} zeroext i1 @_Z1fPb
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// CHECK: load i8, i8* %{{[^ ]*}}, align 1, !range [[RANGE_i8_0_2:![^ ]*]]
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// Only enum-tests follow. Ensure that after the bool test, no further range
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// metadata shows up when strict enums are disabled.
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// NO-STRICT-ENUMS-LABEL: define{{.*}} zeroext i1 @_Z1fPb
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// NO-STRICT-ENUMS: load i8, i8* %{{[^ ]*}}, align 1, !range
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// NO-STRICT-ENUMS-NOT: !range
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enum e1 { };
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e1 g1(e1 *x) {
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return *x;
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}
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// CHECK-LABEL: define{{.*}} i32 @_Z2g1P2e1
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// CHECK: ret i32 %0
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enum e2 { e2_a = 0 };
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e2 g2(e2 *x) {
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return *x;
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}
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// CHECK-LABEL: define{{.*}} i32 @_Z2g2P2e2
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// CHECK: ret i32 %0
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enum e3 { e3_a = 16 };
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e3 g3(e3 *x) {
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return *x;
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}
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// CHECK-LABEL: define{{.*}} i32 @_Z2g3P2e3
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// CHECK: load i32, i32* %x, align 4, !range [[RANGE_i32_0_32:![^ ]*]]
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enum e4 { e4_a = -16};
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e4 g4(e4 *x) {
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return *x;
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}
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// CHECK-LABEL: define{{.*}} i32 @_Z2g4P2e4
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// CHECK: load i32, i32* %x, align 4, !range [[RANGE_i32_m16_16:![^ ]*]]
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enum e5 { e5_a = -16, e5_b = 16};
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e5 g5(e5 *x) {
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return *x;
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}
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// CHECK-LABEL: define{{.*}} i32 @_Z2g5P2e5
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// CHECK: load i32, i32* %x, align 4, !range [[RANGE_i32_m32_32:![^ ]*]]
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enum e6 { e6_a = -1 };
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e6 g6(e6 *x) {
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return *x;
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}
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// CHECK-LABEL: define{{.*}} i32 @_Z2g6P2e6
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// CHECK: load i32, i32* %x, align 4, !range [[RANGE_i32_m1_1:![^ ]*]]
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enum e7 { e7_a = -16, e7_b = 2};
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e7 g7(e7 *x) {
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return *x;
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}
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// CHECK-LABEL: define{{.*}} i32 @_Z2g7P2e7
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// CHECK: load i32, i32* %x, align 4, !range [[RANGE_i32_m16_16]]
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enum e8 { e8_a = -17};
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e8 g8(e8 *x) {
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return *x;
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}
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// CHECK-LABEL: define{{.*}} i32 @_Z2g8P2e8
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// CHECK: load i32, i32* %x, align 4, !range [[RANGE_i32_m32_32:![^ ]*]]
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enum e9 { e9_a = 17};
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e9 g9(e9 *x) {
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return *x;
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}
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// CHECK-LABEL: define{{.*}} i32 @_Z2g9P2e9
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// CHECK: load i32, i32* %x, align 4, !range [[RANGE_i32_0_32]]
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enum e10 { e10_a = -16, e10_b = 32};
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e10 g10(e10 *x) {
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return *x;
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}
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// CHECK-LABEL: define{{.*}} i32 @_Z3g10P3e10
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// CHECK: load i32, i32* %x, align 4, !range [[RANGE_i32_m64_64:![^ ]*]]
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enum e11 {e11_a = 4294967296 };
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enum e11 g11(enum e11 *x) {
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return *x;
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}
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// CHECK-LABEL: define{{.*}} i64 @_Z3g11P3e11
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// CHECK: load i64, i64* %x, align {{[84]}}, !range [[RANGE_i64_0_2pow33:![^ ]*]]
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enum e12 {e12_a = 9223372036854775808U };
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enum e12 g12(enum e12 *x) {
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return *x;
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}
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// CHECK-LABEL: define{{.*}} i64 @_Z3g12P3e12
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// CHECK: load i64, i64* %x, align {{[84]}}
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// CHECK-NOT: range
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// CHECK: ret
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enum e13 : char {e13_a = -1 };
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e13 g13(e13 *x) {
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return *x;
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}
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// CHECK-LABEL: define{{.*}} signext i8 @_Z3g13P3e13
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// CHECK: load i8, i8* %x, align 1
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// CHECK-NOT: range
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// CHECK: ret
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enum class e14 {e14_a = 1};
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e14 g14(e14 *x) {
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return *x;
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}
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// CHECK-LABEL: define{{.*}} i32 @_Z3g14P3e14
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// CHECK: load i32, i32* %x, align 4
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// CHECK-NOT: range
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// CHECK: ret
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enum e15 { e15_a = 2147483648 };
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e15 g15(e15 *x) {
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return *x;
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}
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// CHECK-LABEL: define{{.*}} i32 @_Z3g15P3e15
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// CHECK: load i32, i32* %x, align 4
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// CHECK-NOT: range
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// CHECK: ret
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enum e16 { e16_a = -2147483648 };
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e16 g16(e16 *x) {
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return *x;
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}
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// CHECK-LABEL: define{{.*}} i32 @_Z3g16P3e16
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// CHECK: load i32, i32* %x, align 4
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// CHECK-NOT: range
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// CHECK: ret
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// CHECK: [[RANGE_i8_0_2]] = !{i8 0, i8 2}
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// CHECK: [[RANGE_i32_0_32]] = !{i32 0, i32 32}
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// CHECK: [[RANGE_i32_m16_16]] = !{i32 -16, i32 16}
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// CHECK: [[RANGE_i32_m32_32]] = !{i32 -32, i32 32}
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// CHECK: [[RANGE_i32_m1_1]] = !{i32 -1, i32 1}
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// CHECK: [[RANGE_i32_m64_64]] = !{i32 -64, i32 64}
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// CHECK: [[RANGE_i64_0_2pow33]] = !{i64 0, i64 8589934592}
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