// Take hint when possible.
if (Hint) {
- switch(calcSpillCost(Hint)) {
- default:
- definePhysReg(MI, Hint, regFree);
- // Fall through.
- case 0:
+ // Ignore the hint if we would have to spill a dirty register.
+ unsigned Cost = calcSpillCost(Hint);
+ if (Cost < spillDirty) {
+ if (Cost)
+ definePhysReg(MI, Hint, regFree);
return assignVirtToPhysReg(LRE, Hint);
- case spillImpossible:
- break;
}
}
--- /dev/null
+; 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
+}