derek.holloway
7502bf64a4
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40 lines
1.5 KiB
LLVM
40 lines
1.5 KiB
LLVM
; NOTE: This test verifies that a redundant load immediate of zero is folded
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; NOTE: from its use in an isel and deleted as it is no longer in use.
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; RUN: llc -mcpu=pwr9 -mtriple=powerpc64le-unknown-linux-gnu \
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; RUN: -ppc-asm-full-reg-names -verify-machineinstrs < %s | FileCheck %s
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; RUN: llc -mcpu=pwr9 -mtriple=powerpc64-unknown-linux-gnu \
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; RUN: -ppc-asm-full-reg-names -verify-machineinstrs < %s | FileCheck %s
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%0 = type { i32, i16 }
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@val = common dso_local local_unnamed_addr global ptr null, align 8
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define dso_local signext i32 @redunLoadImm(ptr %arg) {
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; CHECK-LABEL: redunLoadImm:
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; verify that the load immediate has been folded into the isel and deleted
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; CHECK-NOT: li r[[REG1:[0-9]+]], 0
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; CHECK: iseleq r[[REG2:[0-9]+]], 0, r[[REG3:[0-9]+]]
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bb:
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%tmp = icmp eq ptr %arg, null
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br i1 %tmp, label %bb9, label %bb1
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bb1: ; preds = %bb
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%tmp2 = getelementptr inbounds %0, ptr %arg, i64 0, i32 1
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br label %bb3
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bb3: ; preds = %bb3, %bb1
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%tmp4 = load i16, ptr %tmp2, align 4
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%tmp5 = sext i16 %tmp4 to i64
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%tmp6 = getelementptr inbounds %0, ptr %arg, i64 %tmp5
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%tmp7 = icmp eq i16 %tmp4, 0
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%tmp8 = select i1 %tmp7, ptr null, ptr %tmp6
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store ptr %tmp8, ptr @val, align 8
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br label %bb3
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bb9: ; preds = %bb
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%tmp10 = load ptr, ptr @val, align 8
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%tmp12 = load i32, ptr %tmp10, align 4
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ret i32 %tmp12
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}
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