This fixes an instcombine crash on PR3235.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61775
91177308-0d34-0410-b5e6-
96231b3b80d8
template<typename ITy>
bool match(ITy *V) {
- return isa<ConstantInt>(V) && cast<ConstantInt>(V)->getSExtValue() == Val;
+ if (const ConstantInt *CI = dyn_cast<ConstantInt>(V)) {
+ const APInt &CIV = CI->getValue();
+ if (Val > 0)
+ return CIV == Val;
+ // If Val is negative, and CI is shorter than it, truncate to the right
+ // number of bits. If it is larger, then we have to sign extend. Just
+ // compare their negated values.
+ return -CIV == -Val;
+ }
+ return false;
}
};
--- /dev/null
+; RUN: llvm-as < %s | opt -instcombine | llvm-dis
+; PR3235
+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"
+target triple = "x86_64-unknown-linux-gnu"
+
+define hidden i128 @"\01_gfortrani_max_value"(i32 %length, i32 %signed_flag) nounwind {
+entry:
+ switch i32 %length, label %bb13 [
+ i32 1, label %bb17
+ i32 4, label %bb9
+ i32 8, label %bb5
+ ]
+
+bb5: ; preds = %entry
+ %0 = icmp eq i32 %signed_flag, 0 ; <i1> [#uses=1]
+ %iftmp.28.0 = select i1 %0, i128 18446744073709551615, i128 9223372036854775807 ; <i128> [#uses=1]
+ ret i128 %iftmp.28.0
+
+bb9: ; preds = %entry
+ ret i128 0
+
+bb13: ; preds = %entry
+ ret i128 0
+
+bb17: ; preds = %entry
+ ret i128 0
+}