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158d72d728
Set the writable and dead_on_unwind attributes for sret arguments. These indicate that the argument points to writable memory (and it's legal to introduce spurious writes to it on entry to the function) and that the argument memory will not be used if the call unwinds. This enables additional MemCpyOpt/DSE/LICM optimizations.
64 lines
3.0 KiB
C++
64 lines
3.0 KiB
C++
// RUN: %clang_cc1 -triple armv7a--none-eabi -target-abi aapcs \
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// RUN: -mfloat-abi soft -target-feature +neon -emit-llvm -o - -O2 %s \
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// RUN: | FileCheck %s --check-prefix=CHECK-SOFT
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// RUN: %clang_cc1 -triple armv7a--none-eabi -target-abi aapcs \
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// RUN: -mfloat-abi hard -target-feature +neon -emit-llvm -o - -O2 %s \
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// RUN: | FileCheck %s --check-prefix=CHECK-HARD
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// RUN: %clang_cc1 -triple armv7a--none-eabi -target-abi aapcs \
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// RUN: -mfloat-abi hard -target-feature +neon -target-feature +fullfp16 \
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// RUN: -emit-llvm -o - -O2 %s \
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// RUN: | FileCheck %s --check-prefix=CHECK-FULL
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typedef float float32_t;
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typedef __fp16 float16_t;
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typedef __attribute__((neon_vector_type(2))) float32_t float32x2_t;
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typedef __attribute__((neon_vector_type(4))) float16_t float16x4_t;
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struct S1 {
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float32x2_t M1;
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float16x4_t M2;
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};
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struct B1 { float32x2_t M; };
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struct B2 { float16x4_t M; };
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struct S2 : B1, B2 {};
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struct S3 : B1 {
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float16x4_t M;
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};
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struct S4 : B1 {
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B2 M[1];
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};
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// S5 does not contain any FP16 vectors
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struct S5 : B1 {
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B1 M[1];
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};
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// CHECK-SOFT: define{{.*}} void @_Z2f12S1(ptr dead_on_unwind noalias nocapture writable writeonly sret(%struct.S1) align 8 %agg.result, [2 x i64] %s1.coerce)
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// CHECK-HARD: define{{.*}} arm_aapcs_vfpcc [2 x <2 x i32>] @_Z2f12S1([2 x <2 x i32>] returned %s1.coerce)
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// CHECK-FULL: define{{.*}} arm_aapcs_vfpcc %struct.S1 @_Z2f12S1(%struct.S1 returned %s1.coerce)
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struct S1 f1(struct S1 s1) { return s1; }
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// CHECK-SOFT: define{{.*}} void @_Z2f22S2(ptr dead_on_unwind noalias nocapture writable writeonly sret(%struct.S2) align 8 %agg.result, [4 x i32] %s2.coerce)
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// CHECK-HARD: define{{.*}} arm_aapcs_vfpcc [2 x <2 x i32>] @_Z2f22S2([2 x <2 x i32>] returned %s2.coerce)
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// CHECK-FULL: define{{.*}} arm_aapcs_vfpcc %struct.S2 @_Z2f22S2(%struct.S2 returned %s2.coerce)
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struct S2 f2(struct S2 s2) { return s2; }
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// CHECK-SOFT: define{{.*}} void @_Z2f32S3(ptr dead_on_unwind noalias nocapture writable writeonly sret(%struct.S3) align 8 %agg.result, [2 x i64] %s3.coerce)
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// CHECK-HARD: define{{.*}} arm_aapcs_vfpcc [2 x <2 x i32>] @_Z2f32S3([2 x <2 x i32>] returned %s3.coerce)
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// CHECK-FULL: define{{.*}} arm_aapcs_vfpcc %struct.S3 @_Z2f32S3(%struct.S3 returned %s3.coerce)
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struct S3 f3(struct S3 s3) { return s3; }
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// CHECK-SOFT: define{{.*}} void @_Z2f42S4(ptr dead_on_unwind noalias nocapture writable writeonly sret(%struct.S4) align 8 %agg.result, [2 x i64] %s4.coerce)
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// CHECK-HARD: define{{.*}} arm_aapcs_vfpcc [2 x <2 x i32>] @_Z2f42S4([2 x <2 x i32>] returned %s4.coerce)
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// CHECK-FULL: define{{.*}} arm_aapcs_vfpcc %struct.S4 @_Z2f42S4(%struct.S4 returned %s4.coerce)
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struct S4 f4(struct S4 s4) { return s4; }
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// CHECK-SOFT: define{{.*}} void @_Z2f52S5(ptr dead_on_unwind noalias nocapture writable writeonly sret(%struct.S5) align 8 %agg.result, [2 x i64] %s5.coerce)
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// CHECK-HARD: define{{.*}} arm_aapcs_vfpcc %struct.S5 @_Z2f52S5(%struct.S5 returned %s5.coerce)
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// CHECK-FULL: define{{.*}} arm_aapcs_vfpcc %struct.S5 @_Z2f52S5(%struct.S5 returned %s5.coerce)
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struct S5 f5(struct S5 s5) { return s5; }
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