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[mips] Missing test case

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Add missing testcase from r272666.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@272784 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Simon Dardis 2016-06-15 13:49:58 +00:00
parent 77e7a065b2
commit b5361d7101
1 changed files with 54 additions and 0 deletions
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54
test/CodeGen/Mips/cstmaterialization/stack.ll Normal file
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; RUN: llc -march=mipsel -mcpu=mips32 < %s | FileCheck %s -check-prefix=CHECK-MIPS32
; RUN: llc -march=mips64el -mcpu=mips64 < %s | \
; RUN: FileCheck %s -check-prefix=CHECK-MIPS64
; RUN: llc -march=mipsel -mcpu=mips64 -target-abi n32 < %s | \
; RUN: FileCheck %s -check-prefix=CHECK-MIPSN32
; Test that the expansion of ADJCALLSTACKDOWN and ADJCALLSTACKUP generate
; (d)subu and (d)addu rather than just (d)addu. The (d)subu sequences are
; generally shorter as the constant that has to be materialized is smaller.
define i32 @main() {
entry:
%z = alloca [1048576 x i8], align 1
%arraydecay = getelementptr inbounds [1048576 x i8], [1048576 x i8]* %z, i32 0, i32 0
%call = call i32 @foo(i8* %arraydecay)
ret i32 0
; CHECK-LABEL: main
; CHECK-MIPS32: lui $[[R0:[0-9]+]], 16
; CHECK-MIPS32: addiu $[[R0]], $[[R0]], 24
; CHECK-MIPS32: subu $sp, $sp, $[[R0]]
; CHECK-MIPS32: lui $[[R1:[0-9]+]], 16
; CHECK-MIPS32: addiu $[[R1]], $[[R1]], 24
; CHECK-MIPS32: addu $sp, $sp, $[[R1]]
; CHECK-MIPS64: lui $[[R0:[0-9]+]], 1
; CHECK-MIPS64: daddiu $[[R0]], $[[R0]], 32
; CHECK-MIPS64: dsubu $sp, $sp, $[[R0]]
; FIXME:
; These are here to match other lui's used in address computations. We need to
; investigate why address computations are not CSE'd. Or implement it.
; CHECK-MIPS64: lui
; CHECK-MIPS64: lui
; CHECK-MIPS64: lui
; CHECK-MIPS64: lui
; CHECK-MIPS64: lui $[[R1:[0-9]+]], 16
; CHECK-MIPS64: daddiu $[[R1]], $[[R1]], 32
; CHECK-MIPS64: daddu $sp, $sp, $[[R1]]
; CHECK-MIPSN32: lui $[[R0:[0-9]+]], 16
; CHECK-MIPSN32: addiu $[[R0]], $[[R0]], 16
; CHECK-MIPSN32: subu $sp, $sp, $[[R0]]
; CHECK-MIPSN32: lui $[[R1:[0-9]+]], 16
; CHECK-MIPSN32: addiu $[[R1]], $[[R1]], 16
; CHECK-MIPSN32: addu $sp, $sp, $[[R1]]
}
declare i32 @foo(i8*)