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2cac2ea7a1
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. llvm-svn: 132900
53 lines
1.7 KiB
LLVM
53 lines
1.7 KiB
LLVM
; RUN: llc < %s -O0 -disable-fp-elim -relocation-model=pic -stats |& FileCheck %s
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;
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; This test should not cause any spilling with RAFast.
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;
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; CHECK: Number of copies coalesced
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; CHECK-NOT: Number of stores added
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;
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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-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
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target triple = "x86_64-apple-darwin10.0.0"
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%0 = type { i64, i64, i8*, i8* }
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%1 = type opaque
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%2 = type opaque
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%3 = type <{ i8*, i32, i32, void (%4*)*, i8*, i64 }>
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%4 = type { i8**, i32, i32, i8**, %5*, i64 }
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%5 = type { i64, i64 }
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%6 = type { i8*, i32, i32, i8*, %5* }
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@0 = external hidden constant %0
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define hidden void @f() ssp {
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bb:
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%tmp5 = alloca i64, align 8
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%tmp6 = alloca void ()*, align 8
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%tmp7 = alloca %3, align 8
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store i64 0, i64* %tmp5, align 8
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br label %bb8
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bb8: ; preds = %bb23, %bb
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%tmp15 = getelementptr inbounds %3* %tmp7, i32 0, i32 4
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store i8* bitcast (%0* @0 to i8*), i8** %tmp15
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%tmp16 = bitcast %3* %tmp7 to void ()*
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store void ()* %tmp16, void ()** %tmp6, align 8
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%tmp17 = load void ()** %tmp6, align 8
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%tmp18 = bitcast void ()* %tmp17 to %6*
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%tmp19 = getelementptr inbounds %6* %tmp18, i32 0, i32 3
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%tmp20 = bitcast %6* %tmp18 to i8*
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%tmp21 = load i8** %tmp19
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%tmp22 = bitcast i8* %tmp21 to void (i8*)*
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call void %tmp22(i8* %tmp20)
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br label %bb23
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bb23: ; preds = %bb8
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%tmp24 = load i64* %tmp5, align 8
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%tmp25 = add i64 %tmp24, 1
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store i64 %tmp25, i64* %tmp5, align 8
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%tmp26 = icmp ult i64 %tmp25, 10
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br i1 %tmp26, label %bb8, label %bb27
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bb27: ; preds = %bb23
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ret void
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}
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