derek.holloway
7502bf64a4
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39 lines
1.6 KiB
LLVM
39 lines
1.6 KiB
LLVM
; RUN: opt < %s "-passes=print<scalar-evolution>" -disable-output 2>&1 | FileCheck %s
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; Convert (sext {-128,+,1}) to {sext(-128),+,sext(1)}, since the
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; trip count is within range where this is safe.
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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"
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target triple = "x86_64-unknown-linux-gnu"
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define void @foo(ptr nocapture %x) nounwind {
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bb1.thread:
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br label %bb1
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bb1: ; preds = %bb1, %bb1.thread
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%i.0.reg2mem.0 = phi i64 [ -128, %bb1.thread ], [ %8, %bb1 ] ; <i64> [#uses=3]
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; CHECK: %i.0.reg2mem.0
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; CHECK-NEXT: --> {-128,+,1}<nsw><%bb1>{{ U: [^ ]+ S: [^ ]+}}{{ *}}Exits: 127
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%0 = trunc i64 %i.0.reg2mem.0 to i8 ; <i8> [#uses=1]
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; CHECK: %0
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; CHECK-NEXT: --> {-128,+,1}<%bb1>{{ U: [^ ]+ S: [^ ]+}}{{ *}}Exits: 127
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%1 = trunc i64 %i.0.reg2mem.0 to i9 ; <i8> [#uses=1]
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; CHECK: %1
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; CHECK-NEXT: --> {-128,+,1}<%bb1>{{ U: [^ ]+ S: [^ ]+}}{{ *}}Exits: 127
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%2 = sext i9 %1 to i64 ; <i64> [#uses=1]
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; CHECK: %2
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; CHECK-NEXT: --> {-128,+,1}<nsw><%bb1>{{ U: [^ ]+ S: [^ ]+}}{{ *}}Exits: 127
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%3 = getelementptr double, ptr %x, i64 %2 ; <ptr> [#uses=1]
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%4 = load double, ptr %3, align 8 ; <double> [#uses=1]
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%5 = fmul double %4, 3.900000e+00 ; <double> [#uses=1]
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%6 = sext i8 %0 to i64 ; <i64> [#uses=1]
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%7 = getelementptr double, ptr %x, i64 %6 ; <ptr> [#uses=1]
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store double %5, ptr %7, align 8
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%8 = add i64 %i.0.reg2mem.0, 1 ; <i64> [#uses=2]
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%9 = icmp sgt i64 %8, 127 ; <i1> [#uses=1]
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br i1 %9, label %return, label %bb1
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return: ; preds = %bb1
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ret void
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}
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