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6d5f31ab18
Summary: Nodes that have no uses are eventually pruned when they are selected from the worklist. Record nodes newly added to the worklist or DAG and perform pruning after every combine attempt. Reviewers: efriedma, RKSimon, craig.topper, spatel, jyknight Reviewed By: jyknight Subscribers: jdoerfert, jyknight, nemanjai, jvesely, nhaehnle, javed.absar, hiraditya, jsji, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D58070 llvm-svn: 357283
31 lines
1.0 KiB
LLVM
31 lines
1.0 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -mtriple=powerpc64le-unknown-unknown -verify-machineinstrs | FileCheck %s --check-prefix=CHECKLE
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; RUN: llc < %s -mtriple=powerpc64-unknown-unknown -verify-machineinstrs | FileCheck %s --check-prefix=CHECKBE
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define void @pr39478(i64* %p64, i32* %p32) {
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; CHECKLE-LABEL: pr39478:
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; CHECKLE: # %bb.0: # %entry
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; CHECKLE-NEXT: lbz 3, 4(3)
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; CHECKLE-NEXT: stb 3, 0(4)
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; CHECKLE-NEXT: blr
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;
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; CHECKBE-LABEL: pr39478:
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; CHECKBE: # %bb.0: # %entry
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; CHECKBE-NEXT: lbz 3, 3(3)
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; CHECKBE-NEXT: stb 3, 3(4)
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; CHECKBE-NEXT: blr
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entry:
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%tmp32 = load i64, i64* %p64, align 8
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%tmp33 = load i32, i32* %p32, align 4
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%tmp34 = and i32 %tmp33, -256
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%tmp35 = lshr i64 %tmp32, 32
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%tmp36 = shl nuw nsw i64 %tmp35, 24
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%tmp37 = trunc i64 %tmp36 to i32
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%tmp38 = call i32 @llvm.bswap.i32(i32 %tmp37)
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%tmp39 = or i32 %tmp38, %tmp34
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store i32 %tmp39, i32* %p32, align 4
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ret void
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}
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declare i32 @llvm.bswap.i32(i32)
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