forked from OSchip/llvm-project
43 lines
1.2 KiB
C
43 lines
1.2 KiB
C
// RUN: %clang -O1 -fexperimental-new-pass-manager -fno-unroll-loops -S -o - %s -emit-llvm | FileCheck %s -check-prefix=CHECK-NEWPM
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// RUN: %clang -O1 -fno-experimental-new-pass-manager -fno-unroll-loops -S -o - %s -emit-llvm | FileCheck %s -check-prefix=CHECK-OLDPM
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extern int a[16];
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int b = 0;
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int foo(void) {
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#pragma unroll
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for (int i = 0; i < 16; ++i)
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a[i] = b += 2;
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return b;
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}
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// Check br i1 to make sure that the loop is fully unrolled
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// CHECK-LABEL-NEWPM: foo
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// CHECK-NOT-NEWPM: br i1
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// CHECK-LABEL-OLDPM: foo
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// CHECK-NOT-OLDPM: br i1
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void Helper() {
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const int *nodes[5];
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int num_active = 5;
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while (num_active)
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#pragma clang loop unroll(full)
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for (int i = 0; i < 5; ++i)
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if (nodes[i])
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--num_active;
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}
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// Check br i1 to make sure the loop is gone, there will still be a label branch for the infinite loop.
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// CHECK-LABEL-NEWPM: Helper
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// CHECK-NEWPM: br label
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// CHECK-NEWPM-NOT: br i1
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// CHECK-NEWPM: br label
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// The old pass manager doesn't remove the while loop so check for 5 load i32*.
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// CHECK-LABEL-OLDPM: Helper
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// CHECK-OLDPM: br label
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// CHECK-OLDPM: load i32*
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// CHECK-OLDPM: load i32*
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// CHECK-OLDPM: load i32*
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// CHECK-OLDPM: load i32*
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// CHECK-OLDPM: load i32*
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// CHECK-OLDPM: ret
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