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https://github.com/RPCS3/llvm-mirror.git
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27d9222fb6
Summary: This change introduces the notion of "deoptimization" operand bundles. LLVM can recognize and optimize these in more precise ways than it can a generic "unknown" operand bundles. The current form of this special recognition / optimization is an enum entry in LLVMContext, a LangRef blurb and a verifier rule. Over time we will teach LLVM to do more aggressive optimization around deoptimization operand bundles, exploiting known facts about kinds of state deoptimization operand bundles are allowed to track. Reviewers: reames, majnemer, chandlerc, dexonsmith Subscribers: llvm-commits Differential Revision: http://reviews.llvm.org/D14551 llvm-svn: 252806
50 lines
1.5 KiB
LLVM
50 lines
1.5 KiB
LLVM
; RUN: not opt -verify < %s 2>&1 | FileCheck %s
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; Operand bundles uses are like regular uses, and need to be dominated
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; by their defs.
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declare void @g()
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define void @f0(i32* %ptr) {
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; CHECK: Instruction does not dominate all uses!
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; CHECK-NEXT: %x = add i32 42, 1
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; CHECK-NEXT: call void @g() [ "foo"(i32 42, i64 100, i32 %x), "bar"(float 0.000000e+00, i64 100, i32 %l) ]
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entry:
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%l = load i32, i32* %ptr
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call void @g() [ "foo"(i32 42, i64 100, i32 %x), "bar"(float 0.0, i64 100, i32 %l) ]
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%x = add i32 42, 1
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ret void
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}
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define void @f1(i32* %ptr) personality i8 3 {
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; CHECK: Instruction does not dominate all uses!
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; CHECK-NEXT: %x = add i32 42, 1
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; CHECK-NEXT: invoke void @g() [ "foo"(i32 42, i64 100, i32 %x), "bar"(float 0.000000e+00, i64 100, i32 %l) ]
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entry:
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%l = load i32, i32* %ptr
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invoke void @g() [ "foo"(i32 42, i64 100, i32 %x), "bar"(float 0.0, i64 100, i32 %l) ] to label %normal unwind label %exception
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exception:
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%cleanup = landingpad i8 cleanup
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br label %normal
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normal:
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%x = add i32 42, 1
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ret void
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}
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define void @f_deopt(i32* %ptr) {
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; CHECK: Multiple deopt operand bundles
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; CHECK-NEXT: call void @g() [ "deopt"(i32 42, i64 100, i32 %x), "deopt"(float 0.000000e+00, i64 100, i32 %l) ]
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; CHECK-NOT: call void @g() [ "deopt"(i32 42, i64 120, i32 %x) ]
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entry:
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%l = load i32, i32* %ptr
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call void @g() [ "deopt"(i32 42, i64 100, i32 %x), "deopt"(float 0.0, i64 100, i32 %l) ]
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call void @g() [ "deopt"(i32 42, i64 120) ] ;; The verifier should not complain about this one
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%x = add i32 42, 1
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ret void
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}
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