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- ; RUN: opt < %s -simplifycfg -phi-node-folding-threshold=2 -S | FileCheck %s
- 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-S128"
- target triple = "x86_64-unknown-linux-gnu"
- define i32 @test1(i32 %a, i32 %b, i32 %c) nounwind {
- ; CHECK-LABEL: @test1(
- entry:
- %tmp1 = icmp eq i32 %b, 0
- br i1 %tmp1, label %bb1, label %bb3
- bb1: ; preds = %entry
- %tmp2 = icmp sgt i32 %c, 1
- br i1 %tmp2, label %bb2, label %bb3
- ; CHECK: bb1:
- ; CHECK-NEXT: icmp sgt i32 %c, 1
- ; CHECK-NEXT: add i32 %a, 1
- ; CHECK-NEXT: select i1 %tmp2, i32 %tmp3, i32 %a
- ; CHECK-NEXT: br label %bb3
- bb2: ; preds = bb1
- %tmp3 = add i32 %a, 1
- br label %bb3
- bb3: ; preds = %bb2, %entry
- %tmp4 = phi i32 [ %b, %entry ], [ %a, %bb1 ], [ %tmp3, %bb2 ]
- %tmp5 = sub i32 %tmp4, 1
- ret i32 %tmp5
- }
- define i8* @test4(i1* %dummy, i8* %a, i8* %b) {
- ; Test that we don't speculate an arbitrarily large number of unfolded constant
- ; expressions.
- ; CHECK-LABEL: @test4(
- entry:
- %cond1 = load volatile i1, i1* %dummy
- br i1 %cond1, label %if, label %end
- if:
- %cond2 = load volatile i1, i1* %dummy
- br i1 %cond2, label %then, label %end
- then:
- br label %end
- end:
- %x1 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 1 to i8*), %then ]
- %x2 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 2 to i8*), %then ]
- %x3 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 3 to i8*), %then ]
- %x4 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 4 to i8*), %then ]
- %x5 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 5 to i8*), %then ]
- %x6 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 6 to i8*), %then ]
- %x7 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 7 to i8*), %then ]
- %x8 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 8 to i8*), %then ]
- %x9 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 9 to i8*), %then ]
- %x10 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 10 to i8*), %then ]
- ; CHECK-NOT: select
- ; CHECK: phi i8*
- ; CHECK: phi i8*
- ; CHECK: phi i8*
- ; CHECK: phi i8*
- ; CHECK: phi i8*
- ; CHECK: phi i8*
- ; CHECK: phi i8*
- ; CHECK: phi i8*
- ; CHECK: phi i8*
- ; CHECK: phi i8*
- ret i8* %x10
- }
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