41 lines
873 B
C
41 lines
873 B
C
// RUN: %clang_cc1 %s -O3 -emit-llvm -o - | FileCheck %s
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//
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// PR13214
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// No assumption may be made about the order that a frontend emits branch
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// targets (basic blocks). However, the backend's basic block layout makes an
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// attempt to preserve source order of control flow, and any bias toward source
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// order must start with the frontend.
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//
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// Note that the frontend inverts branches to simplify the condition, so the
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// order of a branch instruction's labels cannot be used as a source order bias.
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void calla();
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void callb();
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void callc();
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// CHECK: @test1
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// CHECK: @calla
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// CHECK: @callb
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// CHECK: @callc
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// CHECK: ret void
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void test1(int a) {
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if (a)
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calla();
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else
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callb();
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callc();
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}
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// CHECK: @test2
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// CHECK: @callb
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// CHECK: @calla
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// CHECK: @callc
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// CHECK: ret void
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void test2(int a) {
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if (!a)
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callb();
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else
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calla();
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callc();
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}
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