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34efb823fc
Do not combine (trunc adde(X, Y, Carry)) into (adde trunc(X), trunc(Y), Carry), if adde is not legal for the target. Even it's at type-legalize phase. Because adde is special and will not be legalized at operation-legalize phase later. This fixes: PR40922 https://bugs.llvm.org/show_bug.cgi?id=40922 Differential Revision: https://reviews.llvm.org//D60854 llvm-svn: 359532
37 lines
937 B
LLVM
37 lines
937 B
LLVM
; RUN: llc -verify-machineinstrs -mtriple=powerpc-unknown-linux-gnu < %s | FileCheck %s
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; Test case adapted from PR40922.
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@a.b = internal global i32 0, align 4
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define i32 @a() {
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entry:
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%call = tail call i32 bitcast (i32 (...)* @d to i32 ()*)()
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%0 = load i32, i32* @a.b, align 4
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%conv = zext i32 %0 to i64
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%add = add nuw nsw i64 %conv, 6
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%and = and i64 %add, 8589934575
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%cmp = icmp ult i64 %and, %conv
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br i1 %cmp, label %if.then, label %if.end
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if.then: ; preds = %entry
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%call3 = tail call i32 bitcast (i32 (...)* @e to i32 ()*)()
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br label %if.end
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if.end: ; preds = %if.then, %entry
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store i32 %call, i32* @a.b, align 4
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ret i32 undef
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}
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; CHECK-LABEL: @a
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; CHECK: li 5, 0
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; CHECK: mr 30, 3
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; CHECK: addic 6, 4, 6
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; CHECK: addze 5, 5
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; CHECK: rlwinm 6, 6, 0, 28, 26
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; CHECK: andi. 5, 5, 1
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declare i32 @d(...)
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declare i32 @e(...)
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