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034e32765e
And another step towards transformss not introducing inttoptr and/or ptrtoint casts that weren't there already. In this case, when load/store uses have conflicting types, instead of falling back to the iN, we can try to use allocated sub-type. As disscussed, this isn't the best idea overall (we shouldn't rely on allocated type), but it works fine as a temporary measure. I've measured, and @ `-O3` as of vanilla llvm test-suite + RawSpeed, this results in +0.05% more bitcasts, -5.51% less inttoptr and -1.05% less ptrtoint (at the end of middle-end opt pipeline) See https://bugs.llvm.org/show_bug.cgi?id=47592 Reviewed By: efriedma Differential Revision: https://reviews.llvm.org/D88788
37 lines
1.4 KiB
LLVM
37 lines
1.4 KiB
LLVM
; RUN: opt < %s -sroa -S | FileCheck %s
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target datalayout = "E-m:e-i64:64-n32:64"
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target triple = "powerpc64-unknown-linux-gnu"
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%struct.ld2 = type { [2 x ppc_fp128] }
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declare void @bar(i8*, [2 x i128])
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define void @foo(i8* %v) #0 {
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entry:
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%v.addr = alloca i8*, align 8
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%z = alloca %struct.ld2, align 16
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store i8* %v, i8** %v.addr, align 8
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%dat = getelementptr inbounds %struct.ld2, %struct.ld2* %z, i32 0, i32 0
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%arrayidx = getelementptr inbounds [2 x ppc_fp128], [2 x ppc_fp128]* %dat, i32 0, i64 0
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store ppc_fp128 0xM403B0000000000000000000000000000, ppc_fp128* %arrayidx, align 16
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%dat1 = getelementptr inbounds %struct.ld2, %struct.ld2* %z, i32 0, i32 0
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%arrayidx2 = getelementptr inbounds [2 x ppc_fp128], [2 x ppc_fp128]* %dat1, i32 0, i64 1
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store ppc_fp128 0xM4093B400000000000000000000000000, ppc_fp128* %arrayidx2, align 16
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%0 = load i8*, i8** %v.addr, align 8
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%coerce.dive = getelementptr %struct.ld2, %struct.ld2* %z, i32 0, i32 0
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%1 = bitcast [2 x ppc_fp128]* %coerce.dive to [2 x i128]*
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%2 = load [2 x i128], [2 x i128]* %1, align 1
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call void @bar(i8* %0, [2 x i128] %2)
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ret void
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}
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; CHECK-LABEL: @foo
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; CHECK-NOT: i128 4628293042053316608
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; CHECK-NOT: i128 4653260752096854016
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; CHECK-DAG: bitcast ppc_fp128 0xM403B0000000000000000000000000000 to i128
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; CHECK-DAG: bitcast ppc_fp128 0xM4093B400000000000000000000000000 to i128
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; CHECK: call void @bar(i8* %v, [2 x i128]
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; CHECK: ret void
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attributes #0 = { nounwind }
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