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author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2011-06-13 03:26:46 +0000 |
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committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2011-06-13 03:26:46 +0000 |
commit | 5e5ed4457749995b46d46e9769e657fcc0818e2c (patch) | |
tree | c97c95cd44a3fe2469a41fb69cf45e15125a20af /test/CodeGen/X86 | |
parent | 687397c01387534e98d2e8332d4b91536290d778 (diff) | |
download | llvm-5e5ed4457749995b46d46e9769e657fcc0818e2c.tar.gz llvm-5e5ed4457749995b46d46e9769e657fcc0818e2c.tar.bz2 llvm-5e5ed4457749995b46d46e9769e657fcc0818e2c.tar.xz |
Be less aggressive about hinting in RAFast.
In particular, don't spill dirty registers only to satisfy a hint. It is
not worth it.
The attached test case provides an example where the fast allocator
would spill a register when other registers are available.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132900 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/X86')
-rw-r--r-- | test/CodeGen/X86/2011-06-12-FastAllocSpill.ll | 52 | ||||
-rw-r--r-- | test/CodeGen/X86/fast-isel-gep.ll | 2 |
2 files changed, 53 insertions, 1 deletions
diff --git a/test/CodeGen/X86/2011-06-12-FastAllocSpill.ll b/test/CodeGen/X86/2011-06-12-FastAllocSpill.ll new file mode 100644 index 0000000000..a51dad0303 --- /dev/null +++ b/test/CodeGen/X86/2011-06-12-FastAllocSpill.ll @@ -0,0 +1,52 @@ +; RUN: llc < %s -O0 -disable-fp-elim -relocation-model=pic -stats |& FileCheck %s +; +; This test should not cause any spilling with RAFast. +; +; CHECK: Number of copies coalesced +; CHECK-NOT: Number of stores added +; +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-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64" +target triple = "x86_64-apple-darwin10.0.0" + +%0 = type { i64, i64, i8*, i8* } +%1 = type opaque +%2 = type opaque +%3 = type <{ i8*, i32, i32, void (%4*)*, i8*, i64 }> +%4 = type { i8**, i32, i32, i8**, %5*, i64 } +%5 = type { i64, i64 } +%6 = type { i8*, i32, i32, i8*, %5* } + +@0 = external hidden constant %0 + +define hidden void @f() ssp { +bb: + %tmp5 = alloca i64, align 8 + %tmp6 = alloca void ()*, align 8 + %tmp7 = alloca %3, align 8 + store i64 0, i64* %tmp5, align 8 + br label %bb8 + +bb8: ; preds = %bb23, %bb + %tmp15 = getelementptr inbounds %3* %tmp7, i32 0, i32 4 + store i8* bitcast (%0* @0 to i8*), i8** %tmp15 + %tmp16 = bitcast %3* %tmp7 to void ()* + store void ()* %tmp16, void ()** %tmp6, align 8 + %tmp17 = load void ()** %tmp6, align 8 + %tmp18 = bitcast void ()* %tmp17 to %6* + %tmp19 = getelementptr inbounds %6* %tmp18, i32 0, i32 3 + %tmp20 = bitcast %6* %tmp18 to i8* + %tmp21 = load i8** %tmp19 + %tmp22 = bitcast i8* %tmp21 to void (i8*)* + call void %tmp22(i8* %tmp20) + br label %bb23 + +bb23: ; preds = %bb8 + %tmp24 = load i64* %tmp5, align 8 + %tmp25 = add i64 %tmp24, 1 + store i64 %tmp25, i64* %tmp5, align 8 + %tmp26 = icmp ult i64 %tmp25, 10 + br i1 %tmp26, label %bb8, label %bb27 + +bb27: ; preds = %bb23 + ret void +} diff --git a/test/CodeGen/X86/fast-isel-gep.ll b/test/CodeGen/X86/fast-isel-gep.ll index 48abfd0f26..1a2e34ec7f 100644 --- a/test/CodeGen/X86/fast-isel-gep.ll +++ b/test/CodeGen/X86/fast-isel-gep.ll @@ -24,7 +24,7 @@ define i32 @test2(i64 %t3, i32* %t1) nounwind { %t15 = load i32* %t9 ; <i32> [#uses=1] ret i32 %t15 ; X32: test2: -; X32: movl (%edx,%ecx,4), %eax +; X32: movl (%edx,%ecx,4), %e ; X32: ret ; X64: test2: |