derek.holloway
7502bf64a4
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44 lines
1.3 KiB
C++
44 lines
1.3 KiB
C++
// RUN: %clang_cc1 -emit-llvm -o - -O2 -disable-llvm-passes %s | FileCheck %s --implicit-check-not="call void @llvm.lifetime" --check-prefixes=CHECK,O2
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// RUN: %clang_cc1 -emit-llvm -o - -O2 -disable-lifetime-markers %s | FileCheck %s --implicit-check-not="call void @llvm.lifetime" --check-prefixes=CHECK
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// RUN: %clang_cc1 -emit-llvm -o - -O0 %s | FileCheck %s --implicit-check-not="call void @llvm.lifetime" --check-prefixes=CHECK
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extern int bar(char *A, int n);
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// CHECK-LABEL: @no_switch_bypass
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extern "C" void no_switch_bypass(int n) {
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// O2: call void @llvm.lifetime.start.p0(
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switch (n += 1; int b=n) {
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case 1: {
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// O2: call void @llvm.lifetime.start.p0(
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// O2: call void @llvm.lifetime.end.p0(
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char x;
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bar(&x, 1);
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break;
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}
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case 2:
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n = n;
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// O2: call void @llvm.lifetime.start.p0(
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// O2: call void @llvm.lifetime.end.p0(
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char y[5];
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bar(y, 5);
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break;
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}
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// O2: call void @llvm.lifetime.end.p0(
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}
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// CHECK-LABEL: @switch_bypass
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extern "C" void switch_bypass(int n) {
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// O2: call void @llvm.lifetime.start.p0(
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// O2: call void @llvm.lifetime.end.p0(
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switch (n += 1; int b=n) {
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case 1:
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n = n;
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char x;
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bar(&x, 1);
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break;
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case 2:
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bar(&x, 1);
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break;
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}
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}
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