21 lines
857 B
LLVM
21 lines
857 B
LLVM
; REQUIRES: asserts
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; RUN: llc < %s -mtriple=aarch64-linux-gnu -mattr=+fuse-arith-logic -verify-misched -debug-only=machine-scheduler 2>&1 > /dev/null | FileCheck %s
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; Verify that, the macro-fusion creates the necessary dependencies between SUs and
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; only 2 SU's are fused at most.
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define signext i32 @test(i32 signext %a, i32 signext %b, i32 signext %c, i32 signext %d) {
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entry:
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; CHECK: ********** MI Scheduling **********
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; CHECK-LABEL: %bb.0 entry
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; CHECK: Macro fuse: SU([[SU4:[0-9]+]]) - SU([[SU5:[0-9]+]])
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; CHECK: Bind SU([[SU1:[0-9]+]]) - SU([[SU4]])
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; CHECK-NOT: Macro fuse:
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; CHECK: SU([[SU1]]): %{{[0-9]+}}:gpr32 = COPY $w2
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; CHECK: SU([[SU4]]): %{{[0-9]+}}:gpr32 = nsw ADDWrr
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; CHECK: SU([[SU5]]): %{{[0-9]+}}:gpr32 = nsw ADDWrr
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%add = add nsw i32 %b, %a
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%add1 = add nsw i32 %add, %c
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%sub = sub nsw i32 %add1, %d
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ret i32 %sub
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}
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