| 1 | // RUN: %clang_cc1 -triple armebv7-arm-none-eabi -emit-llvm -w -o - %s | FileCheck %s |
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| 2 | |
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| 3 | // this tests for AAPCS section 5.4: |
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| 4 | // A Composite Type not larger than 4 bytes is returned in r0. |
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| 5 | // The format is as if the result had been stored in memory at a |
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| 6 | // word-aligned address and then loaded into r0 with an LDR instruction |
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| 7 | |
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| 8 | extern union Us { short s; } us; |
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| 9 | union Us callee_us() { return us; } |
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| 10 | // CHECK-LABEL: callee_us() |
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| 11 | // CHECK: zext i16 |
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| 12 | // CHECK: shl |
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| 13 | // CHECK: ret i32 |
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| 14 | |
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| 15 | void caller_us() { |
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| 16 | us = callee_us(); |
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| 17 | // CHECK-LABEL: caller_us() |
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| 18 | // CHECK: call i32 |
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| 19 | // CHECK: lshr i32 |
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| 20 | // CHECK: trunc i32 |
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| 21 | } |
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| 22 | |
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| 23 | extern struct Ss { short s; } ss; |
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| 24 | struct Ss callee_ss() { return ss; } |
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| 25 | // CHECK-LABEL: callee_ss() |
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| 26 | // CHECK: zext i16 |
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| 27 | // CHECK: shl |
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| 28 | // CHECK: ret i32 |
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| 29 | |
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| 30 | void caller_ss() { |
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| 31 | ss = callee_ss(); |
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| 32 | // CHECK-LABEL: caller_ss() |
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| 33 | // CHECK: call i32 |
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| 34 | // CHECK: lshr i32 |
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| 35 | // CHECK: trunc i32 |
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| 36 | } |
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| 37 | |
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| 38 | |
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