diff options
Diffstat (limited to 'test/CodeGen/Mips/emergency-spill-slot-near-fp.ll')
-rw-r--r-- | test/CodeGen/Mips/emergency-spill-slot-near-fp.ll | 88 |
1 files changed, 58 insertions, 30 deletions
diff --git a/test/CodeGen/Mips/emergency-spill-slot-near-fp.ll b/test/CodeGen/Mips/emergency-spill-slot-near-fp.ll index a08b68149a7..625abc1a7e0 100644 --- a/test/CodeGen/Mips/emergency-spill-slot-near-fp.ll +++ b/test/CodeGen/Mips/emergency-spill-slot-near-fp.ll @@ -1,34 +1,62 @@ -; Check that register scavenging spill slot is close to $fp. ; RUN: llc -march=mipsel -O0 -relocation-model=pic < %s | FileCheck %s +; Check that register scavenging spill slot is close to $fp. +target triple="mipsel--" -; CHECK: sw ${{.*}}, 8($sp) -; CHECK: lw ${{.*}}, 8($sp) +@var = external global i32 +@ptrvar = external global i8* -define i32 @main(i32 signext %argc, i8** %argv) #0 { -entry: - %retval = alloca i32, align 4 - %argc.addr = alloca i32, align 4 - %argv.addr = alloca i8**, align 4 - %v0 = alloca <16 x i8>, align 16 - %.compoundliteral = alloca <16 x i8>, align 16 - %v1 = alloca <16 x i8>, align 16 - %.compoundliteral1 = alloca <16 x i8>, align 16 - %unused_variable = alloca [16384 x i32], align 4 - %result = alloca <16 x i8>, align 16 - store i32 0, i32* %retval - store i32 %argc, i32* %argc.addr, align 4 - store i8** %argv, i8*** %argv.addr, align 4 - store <16 x i8> <i8 1, i8 2, i8 3, i8 4, i8 5, i8 6, i8 7, i8 8, i8 9, i8 10, i8 11, i8 12, i8 13, i8 14, i8 15, i8 16>, <16 x i8>* %.compoundliteral - %0 = load <16 x i8>, <16 x i8>* %.compoundliteral - store <16 x i8> %0, <16 x i8>* %v0, align 16 - store <16 x i8> zeroinitializer, <16 x i8>* %.compoundliteral1 - %1 = load <16 x i8>, <16 x i8>* %.compoundliteral1 - store <16 x i8> %1, <16 x i8>* %v1, align 16 - %2 = load <16 x i8>, <16 x i8>* %v0, align 16 - %3 = load <16 x i8>, <16 x i8>* %v1, align 16 - %mul = mul <16 x i8> %2, %3 - store <16 x i8> %mul, <16 x i8>* %result, align 16 - ret i32 0 -} +; CHECK-LABEL: func: +define void @func() { + %space = alloca i32, align 4 + %stackspace = alloca[16384 x i32], align 4 + + ; ensure stackspace is not optimized out + %stackspace_casted = bitcast [16384 x i32]* %stackspace to i8* + store volatile i8* %stackspace_casted, i8** @ptrvar -attributes #0 = { noinline "no-frame-pointer-elim"="true" } + ; Load values to increase register pressure. + %v0 = load volatile i32, i32* @var + %v1 = load volatile i32, i32* @var + %v2 = load volatile i32, i32* @var + %v3 = load volatile i32, i32* @var + %v4 = load volatile i32, i32* @var + %v5 = load volatile i32, i32* @var + %v6 = load volatile i32, i32* @var + %v7 = load volatile i32, i32* @var + %v8 = load volatile i32, i32* @var + %v9 = load volatile i32, i32* @var + %v10 = load volatile i32, i32* @var + %v11 = load volatile i32, i32* @var + %v12 = load volatile i32, i32* @var + %v13 = load volatile i32, i32* @var + %v14 = load volatile i32, i32* @var + %v15 = load volatile i32, i32* @var + %v16 = load volatile i32, i32* @var + + ; Computing a stack-relative values needs an additional register. + ; We should get an emergency spill/reload for this. + ; CHECK: sw ${{.*}}, 0($sp) + ; CHECK: lw ${{.*}}, 0($sp) + store volatile i32 %v0, i32* %space + + ; store values so they are used. + store volatile i32 %v0, i32* @var + store volatile i32 %v1, i32* @var + store volatile i32 %v2, i32* @var + store volatile i32 %v3, i32* @var + store volatile i32 %v4, i32* @var + store volatile i32 %v5, i32* @var + store volatile i32 %v6, i32* @var + store volatile i32 %v7, i32* @var + store volatile i32 %v8, i32* @var + store volatile i32 %v9, i32* @var + store volatile i32 %v10, i32* @var + store volatile i32 %v11, i32* @var + store volatile i32 %v12, i32* @var + store volatile i32 %v13, i32* @var + store volatile i32 %v14, i32* @var + store volatile i32 %v15, i32* @var + store volatile i32 %v16, i32* @var + + ret void +} |