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6478e51fd7
Summary: Handle extra output from index loads in cases where we wish to forward a load value directly from a preceeding store. Fixes PR39571. Reviewers: peter.smith, rengolin Subscribers: javed.absar, hiraditya, arphaman, llvm-commits Differential Revision: https://reviews.llvm.org/D54265 llvm-svn: 346654
34 lines
1.7 KiB
LLVM
34 lines
1.7 KiB
LLVM
; RUN: llc < %s -mtriple armv4t-unknown-linux-gnueabi -mattr=+strict-align
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; Avoid crash from forwarding indexed-loads back to store.
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%struct.anon = type { %struct.ma*, %struct.mb }
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%struct.ma = type { i8 }
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%struct.mb = type { i8, i8 }
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%struct.anon.0 = type { %struct.anon.1 }
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%struct.anon.1 = type { %struct.ds }
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%struct.ds = type <{ i8, %union.ie }>
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%union.ie = type { %struct.ib }
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%struct.ib = type { i8, i8, i16 }
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@a = common dso_local local_unnamed_addr global %struct.anon* null, align 4
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@b = common dso_local local_unnamed_addr global %struct.anon.0 zeroinitializer, align 1
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; Function Attrs: norecurse nounwind
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define dso_local void @func() local_unnamed_addr {
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entry:
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%0 = load %struct.anon*, %struct.anon** @a, align 4
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%ad = getelementptr inbounds %struct.anon, %struct.anon* %0, i32 0, i32 0
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%1 = load %struct.ma*, %struct.ma** %ad, align 4
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%c.sroa.0.0..sroa_idx = getelementptr inbounds %struct.ma, %struct.ma* %1, i32 0, i32 0
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%c.sroa.0.0.copyload = load i8, i8* %c.sroa.0.0..sroa_idx, align 1
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%cb = getelementptr inbounds %struct.anon, %struct.anon* %0, i32 0, i32 1
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%band = getelementptr inbounds %struct.anon, %struct.anon* %0, i32 0, i32 1, i32 1
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store i8 %c.sroa.0.0.copyload, i8* %band, align 4
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store i8 6, i8* getelementptr inbounds (%struct.anon.0, %struct.anon.0* @b, i32 0, i32 0, i32 0, i32 1, i32 0, i32 0), align 1
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store i8 2, i8* getelementptr inbounds (%struct.anon.0, %struct.anon.0* @b, i32 0, i32 0, i32 0, i32 1, i32 0, i32 1), align 1
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%2 = bitcast %struct.mb* %cb to i32*
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%3 = load i32, i32* bitcast (i8* getelementptr inbounds (%struct.anon.0, %struct.anon.0* @b, i32 0, i32 0, i32 0, i32 1, i32 0, i32 0) to i32*), align 1
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store i32 %3, i32* %2, align 1
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ret void
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}
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