32720fba18
llvm.loop.licm.disable is already availabe at LLVM-IR level to disable LICM per loop. This PR simply exposes that capability to the developers at clang level.
25 lines
689 B
C++
25 lines
689 B
C++
// RUN: %clang_cc1 -triple x86_64-apple-darwin -std=c++11 -emit-llvm -o - %s | FileCheck %s
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void while_test(int *List, int Length, int *List2, int Length2) {
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// CHECK: define {{.*}} @_Z10while_test
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int i = 0;
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#pragma clang loop licm(disable)
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while (i < Length) {
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// CHECK: br label {{.*}}, !llvm.loop ![[LOOP_1:.*]]
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List[i] = i * 2;
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i++;
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}
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i = 0;
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while (i < Length2) {
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// CHECK: br label {{.*}}, !llvm.loop [[LOOP_2:![0-9]+]]
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List2[i] = i * 2;
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i++;
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}
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}
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// CHECK: ![[LOOP_1]] = distinct !{![[LOOP_1]], [[MP:![0-9]+]], ![[LICM_DISABLE:.*]]}
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// CHECK: ![[LICM_DISABLE]] = !{!"llvm.licm.disable"}
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// CHECK: [[LOOP_2]] = distinct !{[[LOOP_2]], [[MP]]}
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