47 lines
1.3 KiB
C
47 lines
1.3 KiB
C
// REQUIRES: hexagon-registered-target
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// RUN: %clang_cc1 -emit-llvm -O2 -o - -triple hexagon-unknown-elf -target-cpu hexagonv60 %s | FileCheck %s
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// This unit test validates that the store to "dst" variable needs to be eliminated.
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// CHECK: @brev_store_elimination_test1
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// CHECK: llvm.hexagon.L2.loadri.pbr
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// CHECK-NOT: store
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int *brev_store_elimination_test1(int *ptr, int mod) {
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int dst = 100;
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return __builtin_brev_ldw(ptr, &dst, mod);
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}
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// CHECK: @brev_store_elimination_test2
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// CHECK: llvm.hexagon.L2.loadri.pbr
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// CHECK-NOT: store
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extern int add(int a);
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int brev_store_elimination_test2(int *ptr, int mod) {
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int dst = 100;
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__builtin_brev_ldw(ptr, &dst, mod);
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return add(dst);
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}
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// CHECK: @brev_store_elimination_test3
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// CHECK: llvm.hexagon.L2.loadri.pbr
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// CHECK-NOT: store
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int brev_store_elimination_test3(int *ptr, int mod, int inc) {
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int dst = 100;
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for (int i = 0; i < inc; ++i) {
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__builtin_brev_ldw(ptr, &dst, mod);
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dst = add(dst);
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}
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return dst;
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}
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// brev_store_elimination_test4 validates the fact that we are not deleting the
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// stores if the value is passed by reference later.
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// CHECK: @brev_store_elimination_test4
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// CHECK: llvm.hexagon.L2.loadri.pbr
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// CHECK: store
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extern int sub(int *a);
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int brev_store_elimination_test4(int *ptr, int mod) {
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int dst = 100;
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__builtin_brev_ldw(ptr, &dst, mod);
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return sub(&dst);
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}
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