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40561dd0ba
doesn't dominate the header is needed, don't check whether the increment expression has computable loop evolution. While the operands of an addrec are required to be loop-invariant, they're not required to dominate any part of the loop. This fixes PR6914. llvm-svn: 102389
52 lines
2.2 KiB
LLVM
52 lines
2.2 KiB
LLVM
; RUN: llc -march=x86-64 < %s > /dev/null
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; ScalarEvolution misses an opportunity to fold ((trunc x) + (trunc -x) + y),
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; but LSR should tolerate this.
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; rdar://7886751
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
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target triple = "x86_64-apple-darwin11.0"
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define fastcc void @formatValue(i64 %arg5) nounwind {
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bb12: ; preds = %bb11
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%t = trunc i64 %arg5 to i32 ; <i32> [#uses=1]
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%t13 = sub i64 0, %arg5 ; <i64> [#uses=1]
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%t14 = and i64 %t13, 4294967295 ; <i64> [#uses=1]
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br label %bb15
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bb15: ; preds = %bb21, %bb12
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%t16 = phi i64 [ 0, %bb12 ], [ %t23, %bb15 ] ; <i64> [#uses=2]
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%t17 = mul i64 %t14, %t16 ; <i64> [#uses=1]
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%t18 = add i64 undef, %t17 ; <i64> [#uses=1]
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%t19 = trunc i64 %t18 to i32 ; <i32> [#uses=1]
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%t22 = icmp eq i32 %t19, %t ; <i1> [#uses=1]
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%t23 = add i64 %t16, 1 ; <i64> [#uses=1]
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br i1 %t22, label %bb24, label %bb15
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bb24: ; preds = %bb21, %bb11
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unreachable
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}
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; ScalarEvolution should be able to correctly expand the crazy addrec here.
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; PR6914
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define void @int323() nounwind {
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entry:
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br label %for.cond
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for.cond: ; preds = %lbl_264, %for.inc, %entry
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%g_263.tmp.1 = phi i8 [ undef, %entry ], [ %g_263.tmp.1, %for.cond ]
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%p_95.addr.0 = phi i8 [ 0, %entry ], [ %add, %for.cond ]
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%add = add i8 %p_95.addr.0, 1 ; <i8> [#uses=1]
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br i1 undef, label %for.cond, label %lbl_264
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lbl_264: ; preds = %if.end, %lbl_264.preheader
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%g_263.tmp.0 = phi i8 [ %g_263.tmp.1, %for.cond ] ; <i8> [#uses=1]
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%tmp7 = load i16* undef ; <i16> [#uses=1]
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%conv8 = trunc i16 %tmp7 to i8 ; <i8> [#uses=1]
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%mul.i = mul i8 %p_95.addr.0, %p_95.addr.0 ; <i8> [#uses=1]
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%mul.i18 = mul i8 %mul.i, %conv8 ; <i8> [#uses=1]
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%tobool12 = icmp eq i8 %mul.i18, 0 ; <i1> [#uses=1]
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unreachable
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}
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