https://llvm.org/bugs/show_bug.cgi?id=27421
Bug ID: 27421
Summary: Mips64: Missing sign extension when operand for
truncate instruction is in another basic block.
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: Backend: MIPS
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
Test case for this problem :
define i64 @foo1(i64 zeroext %var) {
entry:
%shr = lshr i64 %var, 32
%cmp = icmp eq i64 %shr, 0
br i1 %cmp, label %if.end6, label %if.then
if.then: ; preds = %entry
%conv = trunc i64 %shr to i32
%cmp2 = icmp slt i32 %conv, 0
br i1 %cmp2, label %if.then4, label %if.else
if.then4: ; preds = %if.then
%add = add i64 %var, 16
br label %if.end6
if.else: ; preds = %if.then
%add5 = add i64 %var, 32
br label %if.end6
if.end6: ; preds = %entry, %if.then4,
%if.else
%var.addr.0 = phi i64 [ %add, %if.then4 ], [ %add5, %if.else ], [ %var,
%entry ]
ret i64 %var.addr.0
}
Command line:
llc < %s -march=mips64el -mcpu=mips64r2 -o test.S
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