427fb35192
The LIT test cases were migrated with the script provided by Nikita Popov. Due to the size of the change it is split into several parts. Reviewed By: nemanja, amyk, nikic, PowerPC Differential Revision: https://reviews.llvm.org/D135470
48 lines
1.8 KiB
LLVM
48 lines
1.8 KiB
LLVM
; RUN: llc -verify-machineinstrs -mcpu=pwr7 -O0 -fast-isel=false < %s | FileCheck %s
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; This tests correct handling of empty aggregate parameters and return values.
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; An empty parameter passed by value does not consume a protocol register or
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; a parameter save area doubleword. An empty parameter passed by reference
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; is treated as any other pointer parameter. An empty aggregate return value
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; is treated as any other aggregate return value, passed via address as a
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; hidden parameter in GPR3. In this example, GPR3 contains the return value
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; address, GPR4 contains the address of e2, and e1 and e3 are not passed or
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; received.
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target datalayout = "E-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-f128:128:128-v128:128:128-n32:64"
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target triple = "powerpc64-unknown-linux-gnu"
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%struct.empty = type {}
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define void @callee(ptr noalias sret(%struct.empty) %agg.result, ptr byval(%struct.empty) %a1, ptr %a2, ptr byval(%struct.empty) %a3) nounwind {
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entry:
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%a2.addr = alloca ptr, align 8
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store ptr %a2, ptr %a2.addr, align 8
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%0 = load ptr, ptr %a2.addr, align 8
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call void @llvm.memcpy.p0.p0.i64(ptr %agg.result, ptr %0, i64 0, i1 false)
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ret void
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}
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; CHECK-LABEL: callee:
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; CHECK: std 4,
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; CHECK-NOT: std 5,
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; CHECK-NOT: std 6,
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; CHECK: blr
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declare void @llvm.memcpy.p0.p0.i64(ptr nocapture, ptr nocapture, i64, i1) nounwind
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define void @caller(ptr noalias sret(%struct.empty) %agg.result) nounwind {
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entry:
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%e1 = alloca %struct.empty, align 1
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%e2 = alloca %struct.empty, align 1
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%e3 = alloca %struct.empty, align 1
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call void @callee(ptr sret(%struct.empty) %agg.result, ptr byval(%struct.empty) %e1, ptr %e2, ptr byval(%struct.empty) %e3)
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ret void
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}
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; CHECK-LABEL: caller:
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; CHECK: addi 4,
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; CHECK-NOT: std 5,
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; CHECK-NOT: std 6,
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; CHECK: bl callee
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