38 lines
883 B
C
38 lines
883 B
C
// RUN: %clang_cc1 -triple armebv7-arm-none-eabi -emit-llvm -w -o - %s | FileCheck %s
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// this tests for AAPCS section 5.4:
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// A Composite Type not larger than 4 bytes is returned in r0.
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// The format is as if the result had been stored in memory at a
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// word-aligned address and then loaded into r0 with an LDR instruction
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extern union Us { short s; } us;
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union Us callee_us() { return us; }
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// CHECK-LABEL: callee_us()
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// CHECK: zext i16
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// CHECK: shl
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// CHECK: ret i32
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void caller_us() {
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us = callee_us();
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// CHECK-LABEL: caller_us()
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// CHECK: call i32
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// CHECK: lshr i32
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// CHECK: trunc i32
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}
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extern struct Ss { short s; } ss;
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struct Ss callee_ss() { return ss; }
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// CHECK-LABEL: callee_ss()
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// CHECK: zext i16
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// CHECK: shl
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// CHECK: ret i32
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void caller_ss() {
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ss = callee_ss();
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// CHECK-LABEL: caller_ss()
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// CHECK: call i32
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// CHECK: lshr i32
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// CHECK: trunc i32
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}
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