ee4ba9f3a1
Unfortunately, it seems we really do need to take the long route; start from the "merge" block, find (all the) "dispatch" blocks, and deal with each "dispatch" block separately, instead of simply starting from each "dispatch" block like it would logically make sense, otherwise we run into a number of other missing folds around `switch` formation, missing sinking/hoisting and phase ordering. This reverts commit85628ce75b. This reverts commitc5fff90953. This reverts commit34a98e1046. This reverts commit1e353f0922.
55 lines
2.2 KiB
LLVM
55 lines
2.2 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -O3 -S -enable-new-pm=0 < %s | FileCheck %s --check-prefixes=ALL
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; RUN: opt -passes='default<O3>' -S < %s | FileCheck %s --check-prefixes=ALL
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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; PR51092: SimplifyCFG might produce duplicate PHI's/select's.
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; We need to deduplicate them so that further transformations are possible.
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define dso_local void @foo(i32* %in, i64 %lo, i64 %hi, i32 %ishi) #0 {
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; ALL-LABEL: @foo(
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; ALL-NEXT: entry:
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; ALL-NEXT: [[TOBOOL_NOT:%.*]] = icmp eq i32 [[ISHI:%.*]], 0
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; ALL-NEXT: [[LO_HI:%.*]] = select i1 [[TOBOOL_NOT]], i64 [[LO:%.*]], i64 [[HI:%.*]]
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; ALL-NEXT: [[ARRAYIDX1:%.*]] = getelementptr inbounds i32, i32* [[IN:%.*]], i64 [[LO_HI]]
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; ALL-NEXT: [[ARRAYVAL2:%.*]] = load i32, i32* [[ARRAYIDX1]], align 4
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; ALL-NEXT: [[INC2:%.*]] = add nsw i32 [[ARRAYVAL2]], 1
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; ALL-NEXT: store i32 [[INC2]], i32* [[ARRAYIDX1]], align 4
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; ALL-NEXT: ret void
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;
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entry:
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%in.addr = alloca i32*, align 8
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%lo.addr = alloca i64, align 8
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%hi.addr = alloca i64, align 8
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%ishi.addr = alloca i32, align 4
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store i32* %in, i32** %in.addr, align 8
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store i64 %lo, i64* %lo.addr, align 8
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store i64 %hi, i64* %hi.addr, align 8
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store i32 %ishi, i32* %ishi.addr, align 4
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%ishi.reloaded = load i32, i32* %ishi.addr, align 4
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%tobool = icmp ne i32 %ishi.reloaded, 0
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br i1 %tobool, label %if.then, label %if.else
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if.then:
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%in.reloaded = load i32*, i32** %in.addr, align 8
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%hi.reloaded = load i64, i64* %hi.addr, align 8
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%arrayidx = getelementptr inbounds i32, i32* %in.reloaded, i64 %hi.reloaded
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%arrayval = load i32, i32* %arrayidx, align 4
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%inc = add nsw i32 %arrayval, 1
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store i32 %inc, i32* %arrayidx, align 4
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br label %if.end
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if.else:
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%in.reloaded2 = load i32*, i32** %in.addr, align 8
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%lo.reloaded = load i64, i64* %lo.addr, align 8
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%arrayidx1 = getelementptr inbounds i32, i32* %in.reloaded2, i64 %lo.reloaded
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%arrayval2 = load i32, i32* %arrayidx1, align 4
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%inc2 = add nsw i32 %arrayval2, 1
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store i32 %inc2, i32* %arrayidx1, align 4
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br label %if.end
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if.end:
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ret void
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}
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